1. Patra, P. K., Air-sea interaction: Connecting the ocean and atmosphere (Invited talk), International Workshop on Perspectives in Atmospheric Chemistry, Ahmedabad, 1996.
2. Patra, P. K., V. Sheel, R. Borchers, P. Fabian, Chlorine and bromine partitioning in the stratosphere, 79th Annual Meeting of American Meteorological Society, Dallas, Jan. 1999.
3. Patra, P. K., S. Lal, Measurements of nitrous oxide and methane in the Indian subcontinent, Conference on Chemistry-Climate Interactions, Trieste, June 2-16, 2000.
4. Patra, P. K., S. Maksyutov, and TransCom-3 modelers, O2 observation network design from inverse model prospective, Eleventh WMO/IAEA Meeting of Experts on Carbon Dioxide Concentration and Related Tracer Measurement Techniques, Tokyo, September, 2001.
5. Patra, P. K., S. Maksyutov, and TransCom-3 modelers, Optimal network design for CO2 observations maximizing the inversion performance, Sixth International Carbon Dioxide Conference, Sendai, October 1-5, 2001.
6. Patra, P. K., M. S. Santhanam, On the distributions and EOFs of HALOE/UARS Ozone and Methane, American Geophysical Union - Fall Meeting, San Francisco, 2001.
7. Patra, P. K., S. Lal, comparison of HALOE/UARS derived methane profiles with balloon measurements, American Geophysical Union - Fall Meeting, San Francisco, 2001.
8. Patra, P. K., S. Maksyutov, M. S. Santhanam, Derived trends of CH4 in the lower stratosphere from HALOE measurements, Non-CO2 Greenhouse Gases (NCGG-3) Scientific understanding, control options nd policy aspects, Masstricht, January, 2002.
9. Patra, P. K., S. Maksyutov, Y. Sasano, T. Nakazawa, Comparing optimal extension of the CO2 observations: surface vs. satellite, Atmospheric Chemistry within the Earth System: From Regional Pollution to Global Climate Change, Crete, September 2002.
10. Patra, P. K., S. Maksyutov, G. Inoue, T. Nakazawa, Network Design for CO2 Observation With High Resolution Inversions, American Geophysical Union - Fall Meeting, San Francisco, 2002.
11. Patra, P. K., S. Maksyutov, and TransCom-3 modelers, Using inverse model to evaluate future CO2 observations: What have we learnt from multimodel transport, EGS-AGU-EUG general assembly, Nice, April 2003.
12. Patra, P. K., S. Maksyutov, A. Ito, and TransCom-3 modelers, An evaluation of an ecosystem model for studying CO2 seasonal cycle and TransCom-3 related activities Transport using multimodel simulations, The TransCom-3 Meeting, Max-Planck Institute, Jena, May 2003.
13. S. Maksyutov, P. K. Patra, and M. Ishizawa, TDI experiment with NIES model and interannually varying NCEP winds, The TransCom-3 Meeting, Max-Planck Institute, Jena, May 2003.
14. S. Maksyutov, P. K. Patra, and G. Inoue, High resolution inverse model application to study utility of satellite CO2 data, International Workshop on Monitoring and Modeling of Global Environmental Change, Kyoto, 21-22 October 2003.
15. Patra, P. K., S. Maksyutov, M. Ishizawa, and T. Nakazawa, Interannual variability in ocean and land CO2 fluxes derived using Time Dependent Inverse model, Eos. Trans. AGU, 84(46), Fall Meet. Suppl., Abstract A52B-0792, December 2003.
16. Patra, P. K., S. Maksyutov, T. Nakazawa, and G. Inoue, Interannual variability of CO2 fluxes from Indian Ocean region derived from atmospheric CO2 data by inverse model, International Workshop on Role of Indian Ocean in Climate Variability over India, Pune, February 2004.
17. Patra, P. K., S. Maksyutov, M. Ishizawa, and T. Nakazawa, Study of Interannual Variability in CO2 Fluxes Using Inverse Modelling of Atmospheric CO2 Observations, 8th International Global Atmospheric Chemistry Conference, Christchurch, September 2004.
18. Patra, P. K., S. K. Behera, J. R. Herman, H. Akimoto, and T. Yamagata, Effects of atmospheric composition on radiation balance, cloud microphysics and Indian summer monsoon rainfall, 85th Annual Meeting of American Meteorological Society, San Diego, January 2005.
19. Patra, P. K., S. Maksyutov, T. Nakazawa, T. Yokota, G. Inuoe, Estimation of Regional CO2 Fluxes, Interannual Flux Variability, and Future Scopes, AGU Chapman Conference on The Science and Technology of Carbon Sequestration, San Diego, January 2005.
19. Patra, P. K., K. Ishijima, T. Nakazawa, S. Maksyutov, T. Takahashi, Subcontinental scale source/sink inversion of atmospheric CO2 and interannual variability in CO2 growth rates, 7th International Carbon Dioxide Conference, Boulder, September 2005.
20. Venevsky, S., Patra, P. K. (jointly with S.V.), S. Maksyutov, G. Inoue, Interannual variability in terrestrial carbon exchange using an ecosystem-fire model and inverse model results, 7th International Carbon Dioxide Conference, Boulder, September 2005.
21. Patra, P. K., K. Ishijima, T. Nakazawa, H. Akimoto, Effect aerosols on the Indian summer monsoon and oceanic biogeochemistry, Asian Aerosol Conference, Mumbai, December 2005.
22. Patra, P. K., S. Venevsky, M. Ishizawa, S. Maksyutov, G. Inoue, T. Nakazawa, Effects of drought and fire on interannual variability in CO2 fluxes as derived using atmospheric-CO2 inversion, Vulnerability of Carbon to Drought and Fire, Canberra, June 2006.
23. Patra, P. K., J. K. Moore, N. Mahowald, M. Uematsu, S. Doney, T. Nakazawa, Biogeochemical processes of carbon exchange at the ocean-atmosphere interface, Joint CACGP/IGAC and WMO conference, Cape Town, September, 2006.
24. Patra, P. K., M. S. Santhanam, M. Takigawa, T. Nakazawa, Power-law scaling in atmospheric-CO2 time series - implications for forward and inverse modelling, Eos. Trans. AGU, 87(52), Fall Meet. Suppl., Abstract A31A-0859, December 2006.
25. Patra, P. K., M. Dileep Kumar, N. Mahowald, V.V.S.S. Sarma, On the contrasting chlorophyll abundances in the Arabian Sea and Bay of Bengal, SOLAS Science 2007, Xiamen, March 2007.
26. Patra, P. K., M. Takigawa, and K. Ishijima, An AGCM transport and multi-tracer based analysis of atmospheric CO2, JPGU Annual Meeting, Chiba city, May 2007.
27. Patra, P. K., R. F. Keeling, S. Piper, M. Takigawa, T. Nakazawa, Analysis of seasonal cycles in 50-year records of atmospheric CO2 using an AGCM based transport model, IUGG, Perugia, July 2007.
28. Patra, P. K., H. Akimoto, The good and bad aerosols: interactions during Indian summer monsoon, IUGG, Perugia, July 2007.
29. Patra, P. K. (Invited), S. Maksyutov, T. Nakazawa, Estimation, validation and understanding of atmospheric-CO2 source/sink variability, Int. Symp. Aerosol-Chem.-Clim. Interactions, November 2007.
30. Patra, P. K., Land and ocean biospheres coupling inferred from observations and modelling - implications for future predictions, Eos. Trans. AGU, 88(52), Fall Meet. Suppl., Abstract B41F-02, December 2007.
31. Patra, P. K., S. Maksyutov, T. Yokota, Global transport model simulation of atmospheric tracers and possible usage of regional weather model, The 2nd East Asia WRF Workshop and Tutorial, Seoul, April 2008.
32. Patra, P. K., K. Miyazaki, M. Takigawa, Global, regional and local scale transport of SF6 and CO2 in the troposphere, TransCom meeting, Utrecht, June 2008.
33. Patra, P. K., R. M. Law, W. Peters, C. Rodenbeck, Simulating synoptic variations in atmospheric CO2: a model intercomparison, 10th IGAC Conference, Annecy, September 2008.
34. Patra, P. K., Transport model simulation of atmospheric CH4 - implications for surface flux estimation, Eos. Trans. AGU, 89(53), Fall Meet. Suppl., Abstract B33B-0431, December 2008.
35. Patra, P. K., X. Xiong, C. Barnet, E. J. Dlugokencky, U. Karin, K. Tsuboi, and D. Worthy, Validation of CH4 surface emission using forward chemistry-transport model, US EPA Intl. Emission Inventory Conference Comprehensive Inventories - Leveraging Technology and Resources, Baltimore, April 2009.
35. Patra, P. K., Y. Niwa, Y. Sawa, M. Takigawa, M. Ikegami, R. Imasu, T. Machida, T. Maki, S. Maksyutov, H. Matsueda, T. Oda, S. Taguchi, CONTRAIL Transport Model Intercomparison: Simulation of CO2 concentration in the UT/LS region, Meteorol. Soc. Jpn. Spring Meeting, Tsukuba, May 2009.
36. Patra, P. K., Role of atmospheric dynamics on interannual variability in methane concentration, Non-CO2 Greenhouse Gases (NCGG-5), Wageningen, July 2009.
37. Patra, P. K., Global warming and air pollution - a brief overview, Indian Meteorol. Soc./Calcutta University, Kolkata, July 2009.
39. Patra, P. K., R. J. Andres, R. F. Keeling, Effect of presubtracted fossil fuel emission on inverse model derived CO2 fluxes for the period 1986-2005, 8th Intl. Carbon Dioxide Conf., Jena, September 2009.
40. Patra, P. K., Y. Niwa, Y. Sawa, D. Belikov, M. Ikegami, R. Imasu, T. Maki, T. Machida, S. Maksyutov, H. Matsueda, T. Nakazawa, T. Oda, M. Takigawa, CONTRAIL-Transport Model Intercomparison (TMI): analysis of CO2 concentrations in the UT/LS region, 8th Intl. Carbon Dioxide Conf., Jena, September 2009.
41. Patra, P. K., M. Krol, D. Cunnold, P. Fraser, S. O'Doherty, R. G. Prinn, P. Simmonds, P. Steele, R. Weiss, S. Lal, S. Toyoda, M. Takigawa, K. Ishijima, T. Nakazawa, Simulation of maturity and decay of methyl chloroform (CH3CCl3) in the atmosphere, AGU Fall Meeting, Abstract A52A-08, December 2009.
42. P. K. Patra, M. Krol, M. Takigawa, T. Arnold, R. Weiss, J. Elkins, S. Montzka, P. Fraser, P. Krummel, S. Lal, S. O'Doherty, P. Simmonds, R. Prinn, Hydroxyl radical (OH) in the troposphere: lessons learned from methyl chloroform simulations, 11th IGAC/12th CACGP Conference, Halifax, July 2010.
43. P. K. Patra (Seminar), Hydroxyl radical (OH) abundance and interhemispheric ratio derived from methyl chloroform simulations, Massachusetts Institute of Technology, July 2010.
44. P. K. Patra (Seminar), Recent activities in GHG modeling work with the ACTM, Harvard University, July 2010
45. P. K. Patra (Invited), J.G. Canadell, R. Boer, P. Ciais, A. Hooijer, R. Houghton, S. Piao, F. Siegert, H. Simbolon, G. van der Werf, Y. Yamagata, TransCom inverse modellers and Terrestrial ecosystem modelers, RECCAP: South and Southeast Asia, 1st RECCAP Meeting, Viterbo, October 2010
46. P. K. Patra (Oral and Session Chair), Transport using SF6, Radon & link transport features with CH4 budgets, TransCom meeting, Berkeley, December 2010.
47. P. K. Patra (Invited), J. Canadell, Towards the establishment of the Southeast Asia carbon budget, B34C-01, AGU Fall Meeting, San Francisco, December 2010.
48. P. K. Patra (Invited), Overview of greenhouse gases research (TransCom and RECCAP), ISRO-Geosphere Biosphere Programme Annual Meeting, Hyderabad, 2011.
49. P. K. Patra (Invited), Carbon balance of South Asia constrained by CARIBIC & CONTRAIL: towards development of Indian observation network, ISRO-Geosphere Biosphere Programme Annual Meeting, Hyderabad, 2011.