Cloud Structure of Uranus and Neptune, K. M. Mihalka, S. K. Atreya, P. A. Egeler-Dowd, American Geophysical Union Meeting, San Francisco, CA, December 2009.

The Carbon Budget of Titan and its Effect on the Organic Landscape of Titan's Surface, E. H. Wilson, S. K. Atreya, American Geophysical Union Meeting, San Francisco, CA, December 2009.

Saturn's Bulk Atmosphere above the Homopause, and its Implications for Cassini's End of Mission, S. G. Edgington, S. K. Atreya, D. E. Shemansky, E. A. Manor-Chapman, D. A. Seal, and B. B. Buffington, Division of Planetary Sciences/AAS Meeting, Puerto Rico, October 2009.

Long-Duration Exploration of Venus with High Altitude Balloons, with K. H. Baines, S. Limaye, et al., IAA International Conference on Low Cost Planetary Missions, Goa, India, September 2009.

H2O and H2O2 Mapping on Mars Near Summer Solstice : Further Evidence for Heterogeneous Chemistry, with Th. Encrenaz, et al., International Conference on Comparative Planetology: Venus-Earth-Mars, ESTEC, Noordwijk, The Netherlands, May, 2009.

Titan's Atmosphere: Deuterium and Noble Gases, with T. Owen, et al., European Geosciences Union, Vienna, Austria, April 2009.

The Martian H2O and H2O2 from IR Observations, with T. Encrenaz et al., Mars Atmosphere Workshop, Virginia, Novemebr 2008.

Ground-based Infrared Observations of Water Vapor and Hydrogen Peroxide in the Atmosphere of Mars near Summer Solstice, with Th. Encrenaz et al., Division of Planetary Sciences/AAS Meeting, Ithaca, New York, October 2008.

The Carbon Inventory of Titan's Atmosphere, E. H. Wilson, S. K. Atreya, Titan After Cassini-Huygens Symposium, Corpus Christi, Texas, July 2008.

Water and Ammonia Abundances with the Juno Microwave Radiometer, with S. Gulkis, E. Adams, M. Allison, S. Bolton, A. Ingersoll, M. Janssen, L. Kamp, J. Lunine, F. Oyafuso, European Geosciences Union Meeting, Vienna, Austria, April 2008.

Martian Methane: Faster Destruction, Bigger Source, S. K. Atreya, G. Delory, T. Encrenaz, V. Formisano, W. Farrell, P. Mahaffy, M. Mumma, N. Renno, European Geosciences Union Meeting, Vienna, Austria, April 2008.

Photochemical Origin of N2 on Titan, and Enceladus (?), S. K. Atreya, D. L. Matson, J. Castillo-Rogez, T. V. Johnson, E. Y. Adams, J. I. Lunine, American Geophysical Union Meeting, San Francisco, CA, December 2007.

Endogenic Origin of Titan's N2, D. L. Matson, S. K. Atreya, J. Castillo-Rogez, T. V. Johnson, E. Y. Adams, J. I. Lunine, American Geophysical Union Meeting, San Francisco, CA, December 2007.

The Influence of Atmospheric and Surficial Processes on Titan Organics, E. H. Wilson and S. K. Atreya, American Geophysical Union Meeting, San Francisco, CA, December 2007.

Simultaneous Ground-based Imaging of H2O and H2O2 on Mars, with Th. Encrenaz et al., European Mars Science and Exploration Conference: Mars Express and ExoMars, ESTEC, Netherlands, November 2007.

Jupiter and Earth: What We Learn from Earth Cloud Observations? With E. Y. Adams and W. R. Kuhn, Division of Planetary Sciences (AAS) Meeting, Orlando, Florida, October 2007.

The Structure of Saturn's Poles Determined by Cassini VIMS: Constraints on Winds and Horizontal and Vertical Cloud Distributions, with K. H. Baines et al., Division of Planetary Sciences (AAS) Meeting, Orlando, Florida, October 2007.

Saturn's Hemispherical Asymmetry: Quantitative Constraints on Differences in Mean Cloud Structures Between the Northern and Southern Hemispheres During Southern Summer, with T. W. Momary et al., Division of Planetary Sciences (AAS) Meeting, Orlando, Florida, October 2007.

Venus Exploration Analysis Group (VEXAG) Overview, S. K. Atreya, J. G. Luhman, S. Mackwell, K. Baines, J. Cutts, A. Ocampo, S. Saunders, T. W. Thompson, T. Balint, Discovery at 15, Huntsville, Alabama, September 2007.

The Harsh Electrochemical Environment in Martian Dust Storms, with W. Farrell, G. Delory, 7th International Conference on Mars, Pasadena, California, July 2007.

Kronos - Saturn Exploration with Probes, with B. Marty, T, Guillot, A Coustenis, and the Kronos Team, International Planetary Probe Workshop IPPW5, Bordeaux, France, June, 2007.

Analog Studies to Evaluate the Performance of the Sample Analysis Suite for the Mars Science Laboratory, P. R. Mahaffy, S. K. Atreya, M. Cabane, C. Webster, K. Firstad, H. Franz and O. Botta, International Workshop on Exploring Mars and its Earth Analogs, Trento, Italy, June, 2007.

Early History of Titan, with J. Castillo, D. Matson, T. Johnson, J. Lunine, AGU Spring Meeting, Acapulco, May 2007.

Saturn's Polar Hexagon at Depth: New Images of Stationary Planetary Waves in the Northern Polar Region by Cassini/VIMS, with K. H. Baines, T. Momary, M. Roos-Serote, R. Brown, B. Buratti, R. Clarke, P. Nicholson, European Geosciences Union Meeting, Vienna, Austria, April 2007.

An Ocean of Water-Ammonia on Neptune and Uranus: Clues from Tropospheric Cloud Structure, S. K. Atreya, K. H. Baines, P. A. Egeler, Division of Planetary Sciences/AAS Meeting, Pasadena, California, October 2006.

Formation of a Nitrogen Atmosphere on Titan, E. Y. Adams, S. K. Atreya, E. H. Wilson, W. R. Kuhn, Division of Planetary Sciences/AAS Meeting, Pasadena, California, October 2006.

Photochemical Distribution of the Venusian Sulfur and Halogen Species, with C. D. Parkinson, A. S. Wong, Division of Planetary Sciences/AAS Meeting, Pasadena, California, October 2006.

Methane Drizzle on Titan, with T. Tokano, C. P. McKay, F. M. Neubauer, F. Ferri, M. Fulchignoni, H. B. Niemann, 1st. Europlanet Science Congress (EPSC), Berlin, Germany, September 2006.

Exploring Venus: The Venus Exploration Analysis Group (VEXAG), S. K. Atreya, A. Ocampo, T. Thompson, J. Luhmann, S. Mackwell, K. Baines, J. Cutts, J. Robinson, S. Saunders, COSPAR Meeting, Beijing, China, July 2006.

The New Juno (Jupiter Polar Orbiter) Mission, S.K. Atreya, presented on behalf of S. Bolton and the Juno Science Team, COSPAR Meeting, Beijing, China, July 2006.

A Mapping of Water Vapor and a Study of CO in the Martian Atmosphere using OMEGA/Mars Express, with Th. Encrenaz, et al., COSPAR Meeting, Beijing, China, July 2006.

Organics, Oxidants, and the Disequilibrium Chemistry of Mars, S. K. Atreya and P. R. Mahaffy, Asia Oceana Geosciences Society Meeting, Singapore, July 2006.

Organic and Isotope Measurement Protocols under Development for the 2009 Mars Science Laboratory, P. R. Mahaffy and S. K. Atreya, Asia Oceana Geosciences Society Meeting, Singapore, July, 2006.

A study of the Martian Atmosphere Using OMEGA/Mars Express and Ground-Based Measurements, with Th. Encrenaz, et al., Asia Oceana Geosciences Society Meeting, Singapore, July, 2006.

Ground-based High Resolution IR Spectroscopy of Mars: H2O and H2O2 Mapping, and Search for CH4, with Th. Encrenaz, et al, European Geosciences Union Meeting, Vienna, Austria, April 2006.

Shallow Probes to the Giant Planets, with S. Bolton, T. Owen, D. Gautier, T. Guillot, A. P. Ingersoll, European Geosciences Union Meeting, Vienna, Austria, April 2006.

Ground-based IR Spectroscopy of Mars: Ground-based High Resolution IR Spectroscopy of Mars: H2O and H2O2 Mapping, and Search for CH4 and Determination of the CO2 Isotope Ratios, with Th. Encrenaz, et al, Workshop on Mars Atmosphere, Climate, and Dynamics, Granada, Spain, February, 2006.

To the Depths of Venus with Venus Express, with K. H. Baines, et al., The AGU Chapman Conference on Exploring Venus as a Terrestrial Planet, Key Largo, Florida, February 2006.

Venus Exploration Analysis Group Overview, with T. W. Thompson, J. G. Luhmann, S. Mackwell, K. Baines, J. Cutts, A. Ocampo, S. Saunders, ESA Venus Entry Probe Workshop, ESTEC, Noordwijk, January 2006.

Water-Ammonia Ionic Ocean on Uranus and Neptune - A Clue from Hydrogen Sulfide Clouds, S. K. Atreya, P. A. Egeler, A. S. Wong, American Geophysical Union Meeting, San Francisco, CA, 2005.

Martian dust devil and storm electric fields: The formation of an O- plasma and new local chemistry, with W. Farrell, et al., American Geophysical Union Meeting, San Francisco, CA, 2005.

Titan - A Fiercely Frozen Echo of the Early Earth, with. T. Owen, H. Niemann, M. Zolotov, American Geophysical Union Meeting, San Francisco, CA, 2005.

An Endogenic Source of Titan's Methane, with M. Zolotov, T. Owen, H. Niemann, E. L. Shock, American Geophysical Union Meeting, San Francisco, CA, 2005.

Mars Atmospheric Chemistry in Electrified Dust Devils and Storms, with W. M. Farrell, G. T. Delory, A. S. Wong, N. O. Renno, et al., The Martian Dust Devil Workshop, Flagstaff, Arizona, September 2005.

Methane on Titan: Photochemical-Meteorological-Hydrogeochemical Cycle, S. K. Atreya, H. B. Niemann, T. C. Owen, E. Y. Adams, J. E. Demick, GCMS Team, Division of Planetary Sciences/AAS Meeting, Cambridge, England, September 2005.

Titan Photochemistry Based on Early Cassini-Huygens Results, E. H. Wilson and S. K. Atreya, Division of PLanetary Sciences/AAS Meeting, Cambridge, England, September 2005.

Early Titan: Origin of Nitrogen, and Haze Through Evolution of Atmospheric Temperature Structure, E. Y. Adams, S. K. Atreya, W. R. Kuhn, Division of Planetary Sciences/AAS Meeting, Cambridge, England, September 2005.

Comparative Sulfur Chemistry of Venus and Mars, Wong, A. S., Atreya, S. K., Division of PLanetary Sciences/AAS Meeting, Cambridge, England, September 2005.

Methane, Oxides of Hydrogen and Carbon, and their Isotope Ratios: Significance and Measurement on NASAs 2009 Mars Science Lab (MSL) Mission, Webster, C. R., Mahaffy, P. R., Atreya, S. K., Division of PLanetary Sciences/AAS Meeting, Cambridge, England, September 2005.

Possible N2 Emissions Associated with Martian Dust Events, with J. J. Caldwell, et al., Division of Planetary Sciences/AAS Meeting, Cambridge, England, September 2005.

Uranus with Spitzer, with G. Orton, et al., Division of Planetary Sciences/AAS Meeting, Cambridge, England, September 2005.

A New View of Venus: Direct Measurements of Planetary Formation and Evolution, Meteorology, Dynamics, and Chemistry with a Long-Duration In-Situ Aerial Tour of our Sister World, K. H. Baines, S. K. Atreya, D. Crisp, et al., International Probes Workshop, Anavyssos, Attica, Greece, July, 2005.

Radiative Transfer in Primordial Atmosphere of Titan, E. Y. Adams, S. K. Atreya, W. R. Kuhn, American Geophysical Union Spring Meeting, New Orleans, Louisiana, May 2005.

Organics, Methane, Oxidants, and Habitability of Mars, S. K. Atreya, N. O. Renno, A. S. Wong, P.R. Mahaffy, European Geosciences Union Meeting, Vienna, Austria, April 2005.

First Results of the Huygens Aerosol Collector Pyrolyzer at Titan, with G. Israel, and the ACP Team, European Geosciences Union Meeting, Vienna, Austria, April 2005.

Electric Dust Devils and Dust Storms, N. O. Renno, S. K. Atreya, J. Koch, C. Yana, European Geosciences Union Meeting, Vienna, Austria, April 2005.

To the Depths of Venus: Salient Deep Atmospheric and Surface Science with Venus Express, with K. Baines, D. Crisp, R. Carlson, and S. Limaye, European Geosciences Union Meeting, Vienna, Austria, April 2005.

A Search for Local Variations of CH4 in the Martian Atmosphere Using PFS/Mars Express, with T. Encrenaz, et al., European Geosciences Union Meeting, Vienna, Austria, April 2005.

Atmospheric Mapping of Mars from Ground-based IR Imaging, with T. Encrenaz, et al., European Geosciences Union Meeting, Vienna, Austria, April 2005.

Mars Atmospheric Chemistry in Electrified Dust Devils and Storms, with W. M. Farrell, et al., The Lunar and Planetary Institute Conference, Houston, Texas, March 2005.

Oxidant Enhancement in Martian Dust Devils and Storms: Implications for Life and Habitability, S. K. Atreya, A. S. Wong, N. O. Renno, G. T. Delory, W. M. Farrell, et al., Mars Conference, ESTEC, Noordwijk, The Netherlands, February 2005.

Juno - New Frontiers Jupiter Orbiter Mission, with S. Bolton, et al., American Geophysical Union Meeting, San Francisco, CA, 2004.

A Neptune-Triton Vision Mission Using Nuclear Electric Propulsion, with P. Steffes, et al., American Geophysical Union Meeting, San Francisco, CA, December 2004.

Radiative Equilibrium - Photochemical Model of Titan's Atmosphere, E. Y. Adams, S. K. Atreya, W. R. Kuhn, American Geophysical Union Meeting, San Francisco, CA, December 2004.

Clouds of Neptune and Uranus: Implications for Entry Probes , A. S. Wong and S. K. Atreya, American Geophysical Union Meeting, San Francisco, CA, December 2004.

Oxidant Enhancement in Martian Dust Devils and Storms: Storm Electric Fields, with G. T. Delory, et al., American Geophysical Union Meeting, San Francisco, CA, December 2004.

Oxidant Enhancement in Martian Dust Devils and Storms: Electrochemistry and Oxidant Production , S. K. Atreya et al., American Geophysical Union Meeting, San Francisco, CA, December 2004.

Methane on Mars - Origin, Loss, Implications for Extinct or Extant Life, S. K. Atreya and A. S. Wong, American Geophysical Union Meeting, San Francisco, CA, December 2004.

A Measurement of the CO2 Isotopic Ratios in the Martian Atmosphere from High Resolution Infrared Ground-based Data, with Th. Encrenaz, et al., Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

A Neptune Vision Mission using Nuclear Electric Propulsion, with B. Bienstock, et al., Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

An HST Search for N2 Emissions on Mars Caused by Electrical Discharges During Dust Storms, with J. J. Caldwell, S. C. Hsu, N. Renno, A. S. Wong, Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

Cloud Structure of Neptune and Uranus , A. S. Wong, S. K. Atreya, Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

On Titan's Primordial Atmospheric Evolution, E. Y. Adams, S. K. Atreya, W. R. Kuhn, Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

Oxidant Enhancement in Martian Dust Devils and Storms: Storm Electric Fields and Electron Dissociative Attachment, with G. T. Delory, et al., Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

Oxidant Enhancement in Martian Dust Devils and Storms, S. K. Atreya, A. S. Wong, N. O. Renno, G. T. Delory, W. M. Farrell, et al., Division of Planetary Sciences Meeting, Louisville, KY, November 2004.

Neptune Orbiter with Probes, with B. Bienstock, D. Atkinson, K. Baines, P. Mahaffy, P. Steffes, A. Stern, International Aeronautical Congress, Invited Paper, Vancouver, Canada, October 2004.

Neptune Orbiter with Probes: A NASA Visions Study Project, with B. Bienstock, D. Atkinson, K. Baines, P. Mahaffy, P. Steffes, A. Stern, Probe Workshop, Ames Research Center, August, 2004.

Neptune's Cloud Structure, A. S. Wong and S. K. Atreya, Probe Workshop, NASA Ames Research Center, August, 2004.

Origin of Giant Planet Atmospheres - Multiple Missions to Multiple Worlds, S. K. Atreya, T. C. Owen, S. Bolton, D. Gautier, COSPAR Meeting, Paris, France, July 2004.

First Results on Trace Gases from Mars Express Planetary Fourier Spectrometer, with D. Titov et al., COSPAR Meeting, Paris, France, July 2004.

Search for Local Variations in CO and H2O with Mars Express/PFS, with E. Lellouch, et al., COSPAR Meeting, Paris, France, July 2004.

Planetary Fourier Spectrometer/Mars Express First Results: Water Vapor and Carbon Monoxide Global Distribution, with N. I. Ignatiev, et al., COSPAR Meeting, Paris, France, July 2004.

First Results of Planetary Fourier Spectrometer at Mars, with V. Formisano, et al., COSPAR Meeting, Paris, France, July 2004.

Multi-Probes to Multi-Worlds, S. K. Atreya. NASA Outer Planets Exploration Forum, Pasadena, California, 21-22 June 2004.

On Titan's Primordial Atmospheric Evolution, E. Y. Adams, S. K. Atreya, W. R. Kuhn, Michigan Geophysical Union Meeting, Ann Arbor, MI, May 2004.

Hydrocarbon Distributions on Neptune, with Th. Encrenaz et al., European Geosciences Union Meeting, Nice, France, April 2004.

Hydrogen Peroxide on Mars- Spatial Distributions and Seasonal Variations, with Th. Encrenaz, et al., European Geosciences Union Meeting, Nice, France, April 2004.

Mars Photochemistry-Hydrogen Peroxide, and other Trace Species, A.-S. Wong , S. K. Atreya, Th. Encrenaz, B. Bezard, European Geosciences Union Meeting, Nice, France, April 2004.

Ammonia Clouds of Jupiter and Saturn-Here Today, Gone Tomorrow? S. K. Atreya and A.-S. Wong, American Geophysical Union Meeting, San Francisco, CA, December 2003.

Composition and Origin of Jupiter's Atmosphere: Follow the Water, S. K. Atreya, Joint Physics and Astronomy and the Earth Sciences Seminar, University of Western Ontario, London, Canada, November 2003.

Hubble Space Telescope Search for Localized Outgassing on Mars, with T. Ouvarova, J. Caldwell, A. S. Wong, N. Renno, P. James, International Mars Polar Conf., Alberta, Canada, October 2003.

Astrobiology Exploration Strategies for the Mars Polar Regions Using Balloon Platforms, with P. R. Mahaffy, et al., International Mars Polar Conference, Alberta, Canada, October 2003.

Are Local Outgassing Sources on Mars Detectable from Earth Using the HST, with J. J. Caldwell, et al., Division of Planetary Sciences Meeting, Monterey, CA, September 2003.

A Polar Orbiter to Probe Jupiter's Deep Atmosphere, Interior, Structure, and Polar Magnetosphere, with S. Bolton, et al., Division of Planetary Sciences Meeting, Monterey, CA, September 2003.

A Photochemically Based Microphysical Study of Titan's Hazes , with E. H. Wilson, R. A. West, S. G. Edgington , Division of Planetary Sciences Meeting, Monterey, CA, September 2003.

In situ Analysis of Organics and Isotopes at Mars , with P. R. Mahaffy, et al., Division of Planetary Sciences Meeting, Monterey, CA, September 2003.

First Detection of CO on Uranus, with Th. Encrenaz, et al., Division of Planetary Sciences Meeting, Monterey, CA, September 2003.

Sample Analysis on Mars, with W. B. Brinkerhoff, P. R. Mahaffy, et al., IAA Conference on Low Cost Planetary Missions, Noordwijk, Netherlands, September 2003.

Sample Analysis at Mars, with W. B. Brinkerhoff, et al., Sixth International Conference on Mars, Pasadena, California, July 2003.

Chemistry Related to Possible Outgassing Sources on Mars, A.-S. Wong, S. K. Atreya, N. Renno, Sixth International Conference on Mars, Pasadena, California, July 2003.

Electrical Discharges in the Martian Dust Devils and Dust Storms, N. Renno, A.-S. Wong, S. K. Atreya, Sixth International Conference on Mars, Pasadena, California, July 2003.

Detectability of Minor Constituents in the Martian Atmosphere from Infrared and Submillimeter Spectroscopy, with Th. Encrenaz, E. Lellouch, A. S. Wong, "The Planet Mars" Workshop at Les Houches, France, May 2003.

Analysis of Organic Molecules and Isotopes from a Mars Lander, with P. Mahaffy, et al., European Geophysical Society-American Geophysical Union Assembly, Nice, France, April 2003.

The 5-micron spectrum of Uranus with the VLT: A Search for CO and PH3, with T. Encrenaz, E. Lellouch, P. Drossart, G. Orton, European Geophysical Society-American Geophysical Union Joint Assembly, Nice, France, April 2003.

Electrical Signature of Martian Dust Activity, A.-S. Wong, N. Renno, S. K. Atreya, European Geophysical Society-American Geophysical Union Joint Assembly, Nice, France, April 2003.

Chemical Identification of Martian Hot Spots, A.-S. Wong, S. K. Atreya, N. Renno, European Geophysical Society-American Geophysical Union Joint Assembly, Nice, France, April 2003.

Jupiter's Ammonia Clouds- Localized or Ubiquitous?, S. K. Atreya, A.-S. Wong, T. C. Owen, M. H. Wong, European Geophysical Society-American Geophysical Union Joint Assembly, Nice, France, April 2003.

If Mars Had Hot Spots, A.-S. Wong, and S. K. Atreya, COSPAR World Space Congress, Houston, Texas, October 2002.

Did Life Exist on Mars? Search for Organic and Inorganic Signatures, with M. Cabane, et al., COSPAR World Space Congress, Houston, Texas, October 2002.

A Stringent Upper Limit of H2O2 in the Martian Atmosphere, with Th. Encrenaz, et al., Division of Planetary Sciences Meeting, Birmingham, Alabama, October 2002.

Chemical Markers of Possible Hot spots on Mars, A.-S. Wong, S. K. Atreya, Th. Encrenaz, V. Formisano, N. Ignatiev, Division of Planetary Sciences Meeting, Birmingham, Alabama, October 2002.

Oxygen Chemistry in Titan's Atmosphere, E. H. Wilson and S. K. Atreya, Division of Planetary Sciences Meeting, Birmingham, Alabama, October 2002.

The O/H Ratio in Jupiter's Atmosphere, with M. Roos-Serote, M. H. Wong, EuroJove Conference, Lisbon, Portugal, July 2002.

The Jupiter Microwave Sounder Concept, with S. J. Bolton, M. Allison, J. Anderson, D. Gautier, S. Gulkis, T. Guillot, M. Hofstadter, M. Janssen, S. Levin, J. Lunine, T. Owen, EuroJove Conference, Lisbon, Portugal, July 2002.

The Nozomi (Planet B) Neutral Mass Spectrometer, Invited Paper, with H. B. Niemann, et al., Joint Mars Express-Nozomi Session at the Japanese Earth and Planetary Science Meeting, Tokyo, Japan, June 2002.

The Jupiter Microwave Sounder Concept, with S. J. Bolton, M. Allison, J. Anderson, D. Gautier, S. Gulkis, T. Guillot, M. Hofstadter, M. Janssen, S. Levin, J. Lunine, T. Owen, European Geophysical Society Meeting, Nice, France, April 2002.

The H3+ Rotational Temperature of Jupiter and Uranus, , with Th. Encrenaz, et al., European Geophysical Society Meeting, Nice, France, April 2002.

A Search for H2O2 in the Martian Atmosphere, with Th. Encrenaz, et al., European Geophysical Society Meeting, Nice, France, April 2002.

A Case for an Intermediate Homopause Level in the Atmosphere of Titan, E. H. Wilson and S. K. Atreya, European Geophysical Society Meeting, Nice, France, April 2002.

Comparative Understanding of Planetary Atmospheres, with D. L. Huestis, et al., Division of Planetary Sciences Meeting, New Orleans, Louisiana, November 2001.

Understanding Divergent Evolution Among Earth-like Planets, the Case for Venus Exploration, with D. Crisp, et al., Division of Planetary Sciences Meeting, New Orleans, Louisiana, November 2001.

Latitudinal Variations in the Jovian Ultraviolet Spectra, with S. G. Edgington, J. Friedson, R. A. West and M. Vincent, Division of Planetary Sciences Meeting, New Orleans, Louisiana, November 2001.

The 3-5 micron Spectrum of Uranus: Constraints on H3+, CO, and PH3, with Th. Encrenaz, G. S. Orton, P. Drossart, and E. Lellouch, Division of Planetary Sciences Meeting, New Orleans, Louisiana, November 2001.

Formation of Haze in the Atmosphere of Titan, E. H. Wilson and S. K. Atreya, Division of Planetary Sciences Meeting, New Orleans, Louisiana, November 2001.

Jupiter: Atmospheric Sounding and Sensing of the Interior (JASSI), with S. J. Bolton, T. Owen, D. Gautier, et al., The NASA Forum on Innovative Approaches to Outer Planetary Exploration, Lunar and Planetary Institute, Houston, Texas, February 2001.

A 2-D Photochemical Model with Meridional Circulation, with S. G. Edgington, R. A. West, and A. J. Friedson, Division of Planetary Sciences Meeting, Pasadena, California, October, 2000.

15N/14N Isotope Ratio in the Atmosphere of Jupiter, P.R. Mahaffy, H. B. Niemann, S. K. Atreya, M. H. Wong, and T. C. Owen, Division of Planetary Sciences Meeting, Pasadena, California, October, 2000.

Benzene Formation in the Atmosphere of Titan, E. H. Wilson and S. K. Atreya, Division of Planetary Sciences Meeting, Pasadena, California, October, 2000.

Molecular and Higher Precision Isotopic Measurements of the Mars Atmosphere and Subsurface Volatiles, P. R. Mahaffy, S. K. Atreya, T. C. Owen, H. B. Niemann, J. Jones, and S. Gorevan, Mars Exploration Workshop, LPI, Houston, Texas, July, 2000.

On the Significance of Atmospheric Parameters on the Abundances of Hydrocarbons in the Atmosphere of Titan, with E. H. Wilson, European Geophysical Society Meeting, Nice, France, April, 2000.

The ISO Spectrum of Uranus and Neptune Between 2.5 and 5 μm, with Th. Encrenaz et al., ISO Beyond the Peaks-The Second ISO Meeting on Analytical Spectroscopy, Villafranca, Spain, February, 2000.

Icy Planetesimals and Formation of Planets and their Atmospheres, with T. C. Owen, et. al., American Geophysical Union Meeting, San Francisco, California, December 1999.

Error Analysis of Galileo Probe Mass Spectrometer Atmospheric Mixing Ratio Measurements, M. H. Wong, S. K. Atreya and P. R. Mahaffy, Division of Planetary Sciences Meeting, Padova, Italy, October, 1999.

Latitudinal Variations of Jupiter in the UV as seen with the HST/Faint Object Spectrograph, S. G. Edgington, S. K. Atreya, L. M. Trafton, R. A. West, J. J. Caldwell, R. F. Beebe, A. Simon, Division of Planetary Sciences Meeting, Padova, Italy, October, 1999.

MA-MISS: Mars Multispectral Imager for Subsurface Studies, with A. Coradini, et al., Division of Planetary Sciences Meeting, Padova, Italy, October, 1999.

Detection of C2H4 on Neptune from ISO/PHT-S Observations, with Th. Encrenaz, B. Bezard, E. Lellouch, B. Schulz, and P. Romani, Division of Planetary Sciences Meeting, Padova, Italy, October, 1999.

Low Temperature Condensates Brought Heavy Elements to Jupiter, T. C. Owen, , P. Mahaffy,H. Niemann, S. K. Atreya, A. Bar-Nun, T. Donahue and I. de Pater, Division of Planetary Sciences Meeting, Padova, Italy, October, 1999.

Sensitivity Studies of Methane Photolysis and its Impact on Hydrocarbon Chemistry in the Atmosphere of Titan, E. H. Wilson and S. K. Atreya, Division of Planetary Sciences Meeting, Padova, Italy, October, 1999.

Mars Solar Balloon Landed Gas Chromatograph Mass Spectrometer, with P. R. Mahaffy, et al., Mars Exploration Program and Sample Return Missions International Symposium, Paris, France, February 1999.

ISO Observations of C2H2 on Uranus and CH3 on Saturn: Implications for Vertical Mixing in the Voyager and ISO Epochs, and a Call for Improved Laboratory Data, S. K. Atreya, Th. Encrenaz, H. Feuchtgruber and S. G. Edgington, The Universe as Seen by ISO Conference, Paris, France, October, 1998.

Heavy Noble Gases in the Atmosphere of Jupiter, P. R. Mahaffy, H. B. Niemann, A. Alpert, S. K. Atreya, T. M. Donahue, T. C. Owen, Division of Planetary Sciences Meeting, Madison, Wisconsin, October, 1998.

Ammonia and Eddy Mixing on Jupiter: Results from UV Spectra and Comparison to IR Results, S. G. Edgington, S. K. Atreya, L. M. Trafton, J. J. Caldwell, R. F. Beebe, A. A. Simon, and R. A. West, Division of Planetary Sciences Meeting, Madison, Wisconsin, October, 1998.

Entrainment in the Galileo Probe Site Downdraft, M. H. Wong, S. K. Atreya, and P. N. Romani, Division of Planetary Sciences Meeting, Madison, Wisconsin, October, 1998.

The D/H Ratio at Jupiter Measured by the Galileo Probe Mass Spectrometer, P. R. Mahaffy, S. K. Atreya, T. M. Donahue, T. C. Owen and H. B. Niemann, COSPAR Meeting, Nagoya, Japan, July 1998.

Molecular and Isotopic Measurements at the Surface of Mars, P. R. Mahaffy, H. B. Niemann,S. K. Atreya and T. C. Owen, JPL-CNES Mars Micromission Workshop, Pasadena, CA, May, 1998.

ISO Observations of Uranus: The Stratospheric Distribution of C2H2 and the Eddy Diffusion Coefficient, S. K. Atreya, Th. Encrenaz, B. Bezard, H. Feuchtgruber, E. Lellouch, J. Bishop, S. Edgington, Th. de Graauw, G. Davis, M. Kessler, European Geophysical Society Meeting, Nice, France, April, 1998.

The Composition of Jupiter's Atmosphere: Noble Gases and Planetesimals, T.C. Owen, S.K. Atreya, P.R. Mahaffy and H.B. Niemann, American Geophysical Union Meeting, San Francisco, December, 1997.

ISO-SWS Observations of Neptune, with B. Bezard et al, Division of Planetary Sciences Meeting, Boston, MA, July 1997.

ISO-SWS Observations of Uranus: The Stratospheric Distribution of C2H2, with Th. Encrenaz et al, Division of Planetary Sciences Meeting, Boston, MA, July, 1997.

Post SL9 Impact Model of Jupiter's Albedo Below 200nm Wavelength, with I. Dashevsky, J. Caldwell et al, Division of Planetary Sciences Meeting, Boston, MA, July 1997.

Phosphine Mixing Ratios and Eddy Diffusion Coefficients in the Troposphere of Saturn, S. G. Edgington, S. K. Atreya, L. M. Trafton, J. J. Caldwell, R. F. Beebe, A. Simon, R. A. West, C. Barnet, Division of Planetary Sciences Meeting, Boston, MA, July, 1997.

Condensible Volatiles and Clouds: A Case for Local Meteorology in the Galileo Probe Entry Region, S. K. Atreya, Colloquium at Goddard Space Flight Center, Greenbelt, Maryland, May, 1997.

The Cassini-Huygens Gas Chromatograph Mass Spectrometer Investigation of Titan's Atmosphere and Surface, S. K. Atreya, European Geophysical Society Meeting, Vienna, Austria, April 1997.

The Composition of Jupiter's Atmosphere: Implications for Origin, T. C. Owen, S. K. Atreya, H. B. Niemann and P. Mahaffy, American Geophysical Union Meeting, San Francisco, December 1996.

Cassini Measurements of Saturn's Atmosphere and Recommendations for Future Missions: Saturn Probe and Giant Planet Multiprobes, S. K. Atreya, Round Table Discussion, Cassini-Huygens International Conference on Saturn and Titan, Bologna, Italy, November, 1996.

Condensible Volatiles, Clouds, and Implications for Meteorology in the Galileo Probe Entry Region: Jupiter is Not Dry! S. K. Atreya, T. C. Owen, M. Wong, H. B. Niemann and P. Mahaffy, Division of Planetary Sciences Meeting, Tucson, Arizona, October, 1996.

Latitudinal Distribution of Ammonia and Upper Limits of Acetylene and Phosphine in Jupiter's Upper Troposphere and Lower Stratosphere, S. G. Edgington, S. K. Atreya, L. M. Trafton, J. J. Caldwell, R. F. Beebe, A. Simon, R. A. West, C. Barnet, Division of Planetary Sciences Meeting, Tucson, Arizona, October, 1996.

Galileo Probe Mass Spectrometer Measurements of the Composition of Jupiter's Atmosphere I:, T.C. Owen, H.B. Niemann, S.K. Atreya, G.R. Carignan, T.M. Donahue, R.E. Hartle, D.M. Hunten, N.W. Spencer, J. Haberman, D. Harpold, W. Kasprzak, P. Mahaffy, European Geophysical Society Meeting, The Hague, Netherlands, May, 1996.

Galileo Mass Spectrometer Measurements of the Chemical Composition of Jupiter's Atmosphere, H. B. Niemann, S. K. Atreya, G. R. Carignan, T. M. Donahue, R. E. Hartle, D. M. Hunten, T. C. Owen, N. W. Spencer, J. Haberman, D. Harpold, W. Kasprzak, P. Mahaffy, American Geophysical Union Meeting, Baltimore, May, 1996.

Chemical Composition of Jupiter's Atmosphere with the Galileo Probe Mass Spectrometer, H. B. Niemann, S . K. Atreya, G. R. Carignan, T. M. Donahue, R. Hartle, D. M. Hunten, T. C. Owen, N. W. Spencer, J. Haberman, D. Harpold, P. Mahaffy, Lunar and Planetary Society Conference, Houston, March, 1996.

HCN and N2 in the Atmosphere of Jupiter , S. K. Atreya and T.C. Owen Division of Planetary Sciences Meeting, Kona, HI, October, 1995.

Upper Limits of SiO, H2S and H2O on Jupiter from SL-9, with J. J. Caldwell, M. Martyn, D. Delrizzo, S. Edgington, C. Barnet, K. Noll, H. Weaver, L. Trafton and S. Yost, Division of Planetary Sciences Meeting, Kona, HI, October, 1995.

HST Spectroscopic Observations of Jupiter in 1992 and 1993: The Latitudinal Variations of NH3 and C2H2 Gas, and UV-Absorbing Aerosols, L. M. Trafton, S. K. Atreya, S. G. Edgington, R. A. West, R. F. Beebe and J. J. Caldwell, IAMAS/IUGG Meeting, Boulder, Colorado, July, 1995.

FUV Spectra of SL9 Impact site G with HST/GHRS, with L. M. Trafton et al., IAU Colloquium on the Impact of Comet Shoemaker-Levy 9 into Jupiter, Space Telescope Science Institute, Baltimore, and May 1995.

Abundances of NH3 and CS2 and Upper Limits of H2S, PH3, C2H2 and C6H6 Above the SL9/G impact site, S. Edgington, S. K. Atreya, L. Trafton, J. Caldwell, K. Noll and H. Weaver, IAU Colloquium on the Impact of Comet Shoemaker-Levy 9 into Jupiter, Space Telescope Science Institute, Baltimore, May, 1995.

The Collision of Comet Shoemaker-Levy 9 with Jupiter: Detection and Evolution of HCN in the Stratosphere of the Planet, with D. Gautier and the JCMT/SL9 Team, Paper presented at the European SL9 Workshop, Garching, Germany, February, 1995.

Modifications of Jupiter's Atmosphere Probed by 3 and 5 μm Spectroscopy at the Canada-France-Hawaii Telescope During the Collision of SL9, with J. P. Maillard and others on the CFHT/SL9 Team, Paper presented at the European SL9 Workshop, Garching, Germany, February, 1995.

The Changed Composition of Jupiter's Atmosphere Following the Impact of Comet S-L 9, with K. S. Noll and others on the HST/SL9 Spectroscopy Team. American Geophysical Union Meeting, San Francisco, California, December 1994.

Photochemical Modeling of Voyager UVS Solar Occultation Light curves Acquired at Neptune, with J. Bishop and P. N. Romani. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

Broadband Submillimeter Observations of the Collision of Comet Shoemaker-Levy 9 with Jupiter from JCMT, with D.A. Naylor and others on the JCMT/SL9 Team. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

JCMT Observations of the Collision of Comet Shoemaker-Levy 9 with Jupiter, with T.C. Owen and others on the JCMT/SL9 Team. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

FTS/CFHT Spectroscopy of the S-L 9 Impact Sites on Jupiter, with J.P. Maillard and others on the CFHT-FTS/SL9 Team. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

Comet S-L 9 Jupiter Impact Events: HST Search for Enhanced Stratospheric CO and H2S, with L. Trafton and others on the HST/SL9 Spectroscopy Team. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

HST/HRS Spectra of Jupiter from 1610 to 1830"H during the S-L 9 Encounter, with J.J. Caldwell and others on the HST/SL9 Spectroscopy Team. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

HST Spectroscopic Observations of Jupiter After the Impact of Comet Shoemaker-Levy 9, with K. S. Noll and others on the HST/SL9 Spectroscopy Team. Division of Planetary Sciences/AAS Meeting, Bethesda, Maryland, October-November, 1994.

Origin of the Atmospheres of the Major Planets -- Clues from Trace Gases, S. K. Atreya, S. G. Edgington, D. Gautier and T. C. Owen, International Conference on Comparative Planetology, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, June, 1994.

Molecular and Isotopic Sampling of the Mars Atmosphere and of Volatiles in Near Surface Solid Phase Material, with P. Mahaffy and H.B. Niemann, Mars Surveyor Workshop, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, May, 1994.

HST Observations of the Spatial Variation of Gases and Aerosols in Jupiter's Atmosphere, with L.M. Trafton, R.A. West, R.F. Beebe, J.J. Caldwell and T.C. Owen, Division of Planetary Sciences Meeting, Boulder, Colorado, October, 1993.

The Far Infrared Spectra of Martian Ices, B.R. Johnson and S.K. Atreya, Division of Planetary Sciences Meeting, Boulder, Colorado, October, 1993.

Stability of the Martian Atmosphere: Is Heterogeneous Catalysis Essential? S.K. Atreya and Z. Gu, Division of Planetary Sciences Meeting, Boulder, Colorado, October 1993.

Methane Photochemistry on Neptune: Ethane and Acetylene Mixing Ratios and Haze Production, with P.N. Romani, J. Bishop and B. Bezard, Division of Planetary Sciences Meeting, Boulder, Colorado, October, 1993.

From Trace Gases to Three Families of Planets, S.K. Atreya, Guest Seminar Series, Solar System Exploration Division, NASA Headquarters, Washington, D.C., August, 1993.

A Model for the Infrared Auroral Hydrocarbon Emission of Jupiter, with P. Drossart, B. Bezard, J. Bishop and J. Waite, Division of Planetary Sciences/AAS Meeting, Munich, Germany, October, 1992.

Hubble Space Telescope Observations of Jupiter's Stratospheric Haze, with R. A. West, E. Karkoschka, M. Tomasko, L. Trafton, R. Beebe and L. Huber, Division of Planetary Sciences/AAS Meeting, Munich, Germany, October, 1992.

HCN and CO on Neptune: An Intrinsic Origin, S. K. Atreya, T. C. Owen, D. Gautier and A. Marten, Division of Planetary Sciences/AAS Meeting, Munich, Germany, October, 1992.

A Non-LTE Model for the Infrared Auroral Hydrocarbon Emission at Jupiter, with P. Drossart, et al., International Workshop on Time Variable Phenomena in the Jovian System, Annapolis, Maryland, July 1992.

Laboratory Studies of Planetary Ices at Far Infrared Wavelengths, with B.R. Johnson, American Geophysical Union Meeting, Montreal, May, 1992.

Origin of CO and HCN in the Atmosphere of Neptune, S. K. Atreya, Neptune Colloquium, Tucson, Arizona, January, 1992.

New Analysis of Voyager UVS Solar Occultations at Neptune--Results on Atmospheric Vertical Mixing and Hydrocarbon Abundances, S. K. Atreya, J. Bishop, P. Romani, American Geophysical Union Meeting, Baltimore, Maryland, June, 1991.

Photochemistry of Water on Mars, E. Chassefiere and S. K. Atreya, "Physico-Chimie Liee Aux Missions Spatiales" Symposium of French Chemical Society and the French Physical Society, Paris-Meudon, October 1990.

H2S Microwave Absorption in the Atmospheres of Uranus and Neptune, with I. De Pater and P. Romani, Division of Planetary Sciences Meeting, Charlottesville, Virginia, October, 1990.

Hydrocarbon Abundances in the Neptune Stratosphere from the Voyager UVS Ingress Solar Occultation, with J. E. Bishop, F. Herbert, B. Sandel and P. Romani, Division of Planetary Sciences Meeting, Charlottesville, Virginia, October, 1990.

Vertical Profiles of the Size and Density of Water Ice Particles in the High Martian Clouds from the Phobos/Solar Occultation Experiment, with E. Chassefiere, J. Blamont and V. Krasnopolsky, Division of Planetary Sciences Meeting, Charlottesville, Virginia, October, 1990.

Kinetic Modeling of Terrestrial H-Alpha Emissions, J. E. Bishop, S. K. Atreya and R. B. Kerr, American Geophysical Society Meeting, Baltimore, June, 1990.

Cloud Structure and Upper Limits on the Ozone Concentration in the High Martian Atmosphere deduced from Phobos/Auguste Solar Occultation Experiment, with E. Chassefiere, et al., European Geophysical Society Meeting, Copenhagen, Denmark, April 1990.

Stability of Carbon Dioxide on Mars: Role of Aerosols, S. K. Atreya and J. E. Blamont, American Geophysical Union Meeting, San Francisco, December, 1989.

Exospheric H-alpha Line Profiles for Low Shadow Heights, with J. Bishop and R. Kerr, American Geophysical Union Meeting, San Francisco, December, 1989.

Resultats sur l'atmosphére de Mars obtenus Resultats sur l'atmosphére de Mars obtenus partir d'occultations solaire dans les domaines de l'ultraviolet et du visible, with J. E. Blamont, CNES/IKI International Colloquium on the Results of the Soviet Phobos Mission, Paris, France, October, 1989.

Reanalysis of Voyager 2 UVS Solar Occultation Data: Uranian Hydrocarbon and Eddy Mixing Distributions, with J. E. Bishop and F. Herbert, Division of Planetary Sciences Meeting, Providence, Rhode Island, October, 1989.

Triton's Ionosphere, S. K. Atreya, American Geophysical Union Meeting, Baltimore, May 1989.

Neptune Aerosol Production, with P. N. Romani, American Geophysical Union Meeting, Baltimore, May 1989.

Exospheric Profiles, with J. Bishop and R. B. Kerr, American Geophysical Union Meeting, San Francisco, California, December 1988.

Two Micron High Resolution Spectra of the Jovian Auroral Zone, with P. Drossart, et al., Division of Planetary Sciences Meeting, Austin, Texas, November, 1988.

Last Gasp pre-Voyager Neptune Encounter Methane Photochemistry and Stratospheric Haze Production, with P. N. Romani, Division of Planetary Sciences Meeting, Austin, Texas, November 1988.

Deep Atmosphere of Uranus, with I. De Pater, P. Romani and S. Gulkis, Uranus Symposium, Pasadena, California, June 1988.

Comets Halley and Wilson: Hydrogen and Oxygen Emissions, with R. B. Kerr, et al., American Geophysical Meeting, Baltimore, May, 1988.

Balmer-Alpha Observations as Suggested by Radiative Transport Theory: First Order Altitude Profiles of Atomic Hydrogen Density, with R. B Kerr and C. A. Tepley, American Geophysical Union Meeting, San Francisco, December, 1987.

Stratospheric Haze Production from Methane Photochemistry on Neptune, P. N. Romani and S. K. Atreya, Division of Planetary Sciences Meeting, Pasadena, California, November, 1987.

Hydrocarbon Hazes on Uranus, S. K. Atreya and P. N. Romani, IUGG Union Symposium, Vancouver, Canada, August, 1987.

Time Variable Structure and Chemical Disequilibrium in Jupiter's Atmosphere, with P. Drossart, R. Courtin and A. Tokunaga, International Workshop on Time Variable Phenomena in the Jovian System, Flagstaff, Arizona, August, 1987.

Deep Atmospheres of the Major Planets, I. de Pater, S. K. Atreya, S. Gulkis and P. N. Romani, Origin and Evolution of Planetary Atmospheres Conference, Tucson, March, 1987.

EUV Occultation Observations by Voyager 2, with B. R. Sandel, et al., American Geophysical Union Meeting, San Francisco, December, 1986.

A Seasonal Variation of Energetic Atomic Hydrogen from Charge Exchange at Arecibo, R. B. Kerr, S. K. Atreya and C. A. Tepley, American Geophysical Union Meeting, San Francisco, December, 1986.

Post Perihelion Observations of Comet Halley at 6300"H and Balmer-Alpha, S. K. Atreya, R. B. Kerr, T. M. Donahue, R. P. Cageo, I. M. Cherchneff and C. A. Tepley, American Geophysical Union Meeting, San Francisco, December, 1986.

A Detection of Acetylene on Uranus using IUE, with Th. Encrenaz, et al., Division of Planetary Sciences Meeting, Paris, France, November, 1986.

Polyacetylene Photochemistry and Condensation on Uranus, P. N. Romani and S. K. Atreya, Division of Planetary Sciences Meeting, Paris, France, November, 1986.

Structure of the Upper Atmosphere of Uranus, with B. R. Sandel, et al., Division of Planetary Sciences Meeting, Paris, France, November, 1986.

Voyager/Uranus UV Occultations -- Atmospheric Vertical Mixing and Photochemistry, S. K. Atreya, P. N. Romani, B. R. Sandel, F. Herbert, A. L. Broadfoot and R. Yelle, Division of Planetary Sciences Meeting, Paris, France, November, 1986.

High Spectral Resolution Fabry-Perot Interferometer Measurements of Comet Halley at H-Alpha and OI 6300"H, with R. B. Kerr, et al., COSPAR/ICSU Plenary Meeting, Toulouse, France, July, 1986.

Fabry-Perot Observations of Hydrogen Balmer-Alpha and Atomic Oxygen (6300"H) Profiles of Comet Halley, with R. B. Kerr, et al., American Geophysical Union Meeting, Baltimore, May, 1986.

A Fourier Deconvolution Technique for the Analysis of Asymmetric, High Resolution Fabry-Perot Profiles: An Application to the Geocoronal Balmer-Alpha Emission. S. K. Atreya, R. B. Kerr, J. W. Meriwether and C. A. Tepley, American Geophysical Union Meeting, San Francisco, December, 1985.

Seasonal and Diurnal Variations of the Geocoronal Balmer-Alpha Emission Profile Width Measured at Arecibo During Low Solar Activity, R. B. Kerr, S. K. Atreya, J. W. Meriwether and C. A. Tepley, American Geophysical Union Meeting, San Francisco, December, 1985.

Four Years of Observations of the H Lyman-alpha Emission from Uranus and Tests for Correlation with the Solar Wind Density, with J. T. Clarke, et al., Division of Planetary Science Meeting, Baltimore, Maryland, October, 1985.

Acetylene, Ethane and Polar Infrared Brightening on Jupiter, with P. Drossart, et al., Division of Planetary Science Meeting, Baltimore, Maryland, October, 1985.

Clouds in the Atmosphere of Uranus, P. N. Romani and S. K. Atreya, Division of Planetary Science Meeting, Baltimore, Maryland, October, 1985.

Exospheric Hydrogen Velocity Distribution and the Topside Ion Temperatures, with R. B. Kerr and J. W. Meriwether, International Association of Geomagnetism and Aeronomy Meeting, Prague, Czechoslovakia, August, 1985.

Observations of the Geocoronal Balmer-Alpha Profiles; Comparison of Exospheric Hydrogen Temperature to the F-Region Ion Temperature at Arecibo, with R. B. Kerr, American Geophysical Union Meeting, San Francisco, December, 1984.

Photochemistry of Methane in the Atmosphere of Neptune, with P. N. Romani, Division of Planetary Sciences/American Astronomical Society Meeting, Kona, Hawaii, October 1984.

Geocoronal Balmer Alpha and the F-Region Oxygen Temperatures, R. B. Kerr, S. K. Atreya, J. W. Meriwether and C. A. Tepley, American Geophysical Union Spring Meeting, Cincinnati, May, 1984.

Uranus: Photochemistry and Hazes, S. K. Atreya, Division of Planetary Sciences, American Astronomical Society Meeting, Cornell University, Ithaca, New York, October, 1983.

Jovian and Saturnian Lyman-Alpha Albedo, and the Atmospheric Vertical Mixing, S. K. Atreya and R. B. Kerr, American Association for the Advancement of Science Meeting, Detroit, Michigan, and May 1983.

Clouds of Jupiter and Saturn, P. N. Romani and S. K. Atreya, American Association for the Advancement of Science Meeting, Detroit, Michigan, May, 1983.

Search for Hydrogen Atoms in Comet Schwassmann Wachmann I, M. C. Festou and S. K. Atreya, International Conference on Cometary Exploration, sponsored by European Physical Society, Budapest, Hungary, November 1982.

Interaction of Saturn's Magnetosphere with Titan's Ionosphere with R. E. Hartle, et al., Saturn International Conference, Tucson, Arizona, May, 1982.

Jovian Cloud Physics, S. K. Atreya, Fourth Meeting of Planetary Atmospheres Principal Investigators, University of Michigan, Ann Arbor, April 1982.

Composition and Structure of Planetary Atmospheres and Ionospheres, S. K. Atreya, Fourth Meeting of Planetary Atmospheres Principal Investigators, University of Michigan, Ann Arbor, April 1982.

Etude des Emissions Lyman-Alpha de Jupiter et de Saturne entre 1967 et 1981, M. C. Festou and S. K. Atreya, Workshop on Planetology, Institut National d'Astronomie et Geophysique Paris, France, February, 1982.

Ultraviolet Spectroscopy on Voyager 2: Extended Saturnian System, with A. L. Broadfoot, et al., Annual Meeting of the American Geophysical Union, San Francisco, December 1981.

Ultraviolet Spectroscopy on Voyager 2: Saturn Atmosphere, with A. L. Broadfoot, et al., Annual Meeting of the American Geophysical Union, San Francisco, December 1981.

Titan's Plasma Wake, with R. E. Hartle, Symposium of Physics of the Jovian and Saturnian Magnetospheres, Applied Physics Laboratory, The Johns Hopkins University, Laurel, Maryland, October, 1981.

Profile Measurements of Geocoronal Hydrogen Balmer Alpha, S. K. Atreya and J. W. Meriwether, International Association of Geomagnetism and Aeronomy, Scientific Assembly, Edinburgh, Scotland, August, 1981.

Saturn Upper Atmosphere and Ionosphere, J. H. Waite Jr., S. K. Atreya, A. F. Nagy, T. M. Donahue, and T. E. Cravens, International Association of Geomagnetism and Aeronomy, Scientific Assembly, Edinburgh, Scotland, August, 1981.

Titan's Ion Exosphere Observed from Voyager 1, R. E. Hartle, E. C. Sittler, J. D. Scudder, and S. K. Atreya, American Geophysical Union Meeting, Baltimore, Maryland, May, 1981.

Planetary Aeronomy Research, S. K. Atreya, NASA Planetary Atmospheres Principal Investigators Third Meeting, Baltimore, Maryland, February 1981.

Ultraviolet Spectroscopy: The Saturnian System, with A. L. Broadfoot, et al., Annual Meeting of the American Geophysical Union, San Francisco, December, 1980.

Ultraviolet Spectroscopy: The Atmospheres of Saturn and Titan, with A. L. Broadfoot, et al., Annual Meeting of the American Geophysical Union, San Francisco, December, 1980.

A Model of the Jovian Aurora, J. H. Waite Jr, T. E. Cravens, S. K. Atreya, J. Kozyra, and A. F. Nagy, Annual Meeting of the American Geophysical Union, San Francisco, December, 1980.

UV Results through Voyager Jupiter Encounter, Poster Talk with A. L. Broadfoot, et al., Meeting of the Division of Planetary Sciences, American Astronomical Society, Tucson, October 1980.

A Spectroscopic Search for N2+ Emissions in the Polar Regions of Saturn and on the Nightside of Venus, E. S. Barker, L. Trafton, and S. K. Atreya, Meeting of the Division of Planetary Sciences, American Astronomical Society, Tucson, October 1980.

IUE Observations of Saturn, J. T. Clarke, H. W. Moos, S. K. Atreya, and A. L. Lane, Meeting of the Division of Planetary Sciences, American Astronomical Society, Tucson, October, 1980.

Creation of Jovian Hydrogen Bulge by Co-Rotating Magnetospheric Convection, A. J. Dessler, B. R. Sandel, and S. K. Atreya, Meeting of the Division of Planetary Sciences, American Astronomical Society, Tucson, October, 1980.

Structure and Composition of the Upper Atmosphere of Jupiter by Voyager 2 Stellar Occultation Experiment, S. K. Atreya, T. M. Donahue, B. R. Sandel, D. E. Shemansky, and A. L. Broadfoot, Meeting of the Division of Planetary Sciences, American Astronomical Society, Tucson, October, 1980.

Energetics of Saturn Ionosphere, J. H. Waite Jr., S. K. Atreya, A. F. Nagy, and T. E. Cravens, Spring Meeting of the American Geophysical Union, Toronto, May, 1980.

Study of the Jovian Upper Atmosphere by a Voyager 2 Ultraviolet Stellar Occultation Experiment, M. C. Festou, S. K. Atreya, and T. M. Donahue, Spring Meeting of the American Geophysical Union, Toronto, May, 1980.

Measurement of Balmer Alpha Geocoronal Profile During Solar Maximum, J. W. Meriwether, S. K. Atreya, and T. M. Donahue, Spring Meeting of the American Geophysical Union, Toronto, May, 1980.

Observations of Io-Plasma Torus, H. W. Moos, J. T. Clarke, S. K. Atreya, and A. L. Lane, IUE Symposium, Goddard Space Flight Center, May, 1980.

Observations of Polar Aurora on Jupiter, with J. T. Clarke, IUE Symposium, Goddard Space Flight Center, May, 1980.

The Effect of Ozone on the Martian Temperature Structure, W. R. Kuhn, S. K. Atreya, and S. E. Postawko, Annual Meeting of the American Geophysical Union, San Francisco, California, December, 1979.

The Ionosphere of Saturn J. H. Waite Jr., S. K. Atreya, and A. F. Nagy, Annual Meeting of the American Geophysical Union, San Francisco, California, December, 1979.

Planetary Aeronomy, S. K. Atreya, NASA Planetary Atmospheres Principal Investigators Second Meeting, Boulder, Colorado, November 1979.

Ultraviolet Studies of Saturn, Jupiter and Venus using IUE, with H. W. Moos, et al., Meeting of the Division of Planetary Sciences, American Astronomical Society, St. Louis, October, 1979.

Voyager 1 Encounter with Jupiter: The Satellites and Magnetosphere by Ultraviolet Spectrometer, with A. L. Broadfoot, et al., Spring Meeting of the American Geophysical Union, Washington, D.C., May 1979.

Voyager 1 Encounter with Jupiter: The Atmosphere by Ultraviolet Spectrometer, with A. L. Broadfoot, et al., Spring Meeting of the American Geophysical Union, Washington, D.C., May 1979.

Ammonia Greenhouse Effect in the Primitive Atmosphere, W. R. Kuhn, and S. K. Atreya, Annual Meeting of the American Geophysical Union, San Francisco, California, December, 1978.

Does Titan Possess a Thick Atmosphere of Nitrogen? S. K. Atreya, T. M. Donahue, and W. R. Kuhn, Meeting of the Division of Planetary Sciences, American Astronomical Society, Pasadena, California, October-November, 1978.

A Program for Research in Planetary Atmospheres at the University of Michigan, S. K. Atreya, NASA Planetary Atmospheres Principal Investigators First Meeting, Pasadena, California, October, 1978.

Methylamine Formation in the Jovian Atmosphere, W. R. Kuhn, S. K. Atreya, and S. Chang, Meeting of the Division of Planetary Sciences, American Astronomical Society, Honolulu, Hawaii, January, 1977.

The Distribution of Ammonia, Hydrazine and Nitrogen in the Atmosphere of Jupiter, S. K. Atreya, T. M. Donahue, and W. R. Kuhn, Meeting of the Division of Planetary Sciences, American Astronomical Society, Honolulu, Hawaii, January, 1977.

Photolysis of Ammonia in the Jovian Atmosphere, S. K. Atreya, National Astronomy and Ionosphere Center, Arecibo Observatory, Puerto Rico, Summer Lecture Series, May, 1976.

Ozone Measurements at High Altitudes, G. R. Riegler, S. K. Atreya, R. J. Cicerone, S. C. Liu, and J. F. Drake, Annual Meeting of the American Geophysical Union, San Francisco, California December, 1976.

Electron Temperature of the Jovian Ionosphere, A. F. Nagy, W. Chameides, R. Chen, and S. K. Atreya, Spring Meeting of the American Geophysical Union, Washington, D. C., April, 1976.

Stellar Occultation Measurements of Nighttime Equatorial Ozone Between 42 km and 114 km Altitude, G. R. Riegler, and S. K. Atreya, Joint Symposium on Atmospheric Ozone of the International Association of Meteorology and Atmospheric Physics, and World Meteorological Organization, Dresden, Germany, 1976.