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Delivered Invited Talks in India and Abroad Invited Talks (Abroad) : (Total -17)
1. Anthropogenic impacts on the tropospheric chemical constituents over Indian geographical region DKRZ, Max-Plank Institute for Meteorology, Hamburg, Germany, June 16, 2005.
2. Global Change Signals in the mesospheric Temperature: Model versus Observations DKRZ, Max-Plank Institute for Meteorology, Hamburg, Germany, July 21, 2004
3. Global Change Signals in the Middle Atmosphere Institute for Chemistry and Dynamics of the Geosphere I (ICG-I), Research Center Jülich, Germany, July 2, 2004
4. Trends and Solar Responses in Mesospheric and Mesopause Region Temperatures IIIrd international workshop on Long Term Changes and Trends in the Atmosphere Sozopol, Bulgaria, June 11, 2004.
5. Tropospheric Ozone and Secondary Pollutants over Tropical Indian Ocean Institute of Environmental Physics, Universität Bremen, Bremen, Germany, May 13, 2004.
6. Emission Inventories, Chemical modeling and MTTA -Project Max-Plank Institute for Meteorology, Hamburg, Germany, May 10, 2004
7. Mesospheric Response to Solar and Human Induced Forcing General Assembly of IUGG (International Union of Geodesy and Geophysics), Sapporo, Japan, July 10, 2003.
8. Review of Trends in Mesospheric Temperatures General Assembly of IUGG (International Union of Geodesy and Geophysics), Sapporo, Japan, July 8, 2003.
9. Review of Mesospheric Temperature Trends under MTTA Project and Association of Solar Activity with Temperature over India Heraeus Seminar on Trends in the Upper Atmosphere”, Kühlungsborn, Germany, 14th May 2002.
10. An overview of the long-term trends in temperature and composition of the Mesosphere. IAGA-IASPEI - Scientific Assembly, Hanoi, Vietnam, Aug. 19-30, 2001
11. An overview of the mesospheric temperature trend -state of the art and progress report on assessment (MTTA) –Invited Review IInd international workshop on “Long Term Changes and Trends in the Atmosphere”, Prague, Czech Republic, July 2-6, 2001.
12. Global Change Arrived in the Ionosphere ?, National Center for Atmospheric Research, Boulder, Co, USA, November, 1998.
13. Volcanic effect on ozone and ionic composition : 2-D model simulations National Centre for Atmospheric Research, Boulder, Co., USA, July 1995.
14. A new reference model of stratospheric ion composition : Latitudinal dependence General Assembly of COSPAR, Hamburg, Germany, July 1994.
15. Stratospheric Ionization National Centre for Atmospheric Research, Boulder, Co., USA, July 1991.
16. Measurements of eddy diffusion coefficient in the middle atmosphere University of Stockholm, Stockholm, April 1989.
17. Atmospheric composition measurements at equator and low latitude SABOAC-II, Melbourne, Australia, November 1988.
Invited Talks (India) : (Total -34)
1. Chemical climate change in South East Asia, Winter School on Climate Change & Its Impacts, New Delhi, December 1992.
2. Two dimensional photochemical modelling and future projections, National Symposium on International Geosphere Biosphere Programme, Madras, April, 1993.
3. Atmospheric response to various trace gas scenarios during the last ice age to 21st century, Brain Storming Session on Global Change, Goa, June, 1993.
4. Scenarios, Montreal Protocol and resulting changes in ozone, FASAS - Seminar on Global Environment Chemistry, New Delhi, September, 1993.
5. Solar irradiances, 3rd SERC-School on Chemistry of Atmospheric Environment, New Delhi, April 1996.
6. Chemical Modelling : I – Models, 3rd SERC-School on Chemistry of Atmospheric Environment, New Delhi, April 1996.
7. Chemical Modelling : II - Scenario, Montreal Protocol and Resulting Changes, 3rd SERC-School on Chemistry of Atmospheric Environment, New Delhi, April 1996.
8. Chemical modelling of NOx and Ozone, National Workshop on Indian Ocean Experiment, New Delhi, August 1996.
9. Stratospheric and Tropospheric Modelling :Global change and changing atmospheric composition, PRL - Golden Jubilee Symposium on Perspectives in Atmospheric Chemistry, Ahmedabad, December, 1996.
10. Chemical modelling of NOx and Ozone, National Workshop on INDOEX (Indian Ocean Experiment), NPL, New Delhi, 19-21 August 1996. Also acted as Rapporteur in a Session on “INDOEX Data Management”.
11. Atmospheric Ozone Problem ?, SERC -School at IITM, Pune, India, June, 1997.
12. Chemical Climate Change: Future Projections, In SERC-school at IITM, Pune, India, June 1997.
13. Long term forcing of greenhouse gases and natural events on atmospheric chemical composition, First International workshop on “Long term Changes and trends in the atmosphere”, Pune, India, February 1999
14. Long Term temperature trends in the mesopause region for different seasons and the report of an international workshop on “Cooling and Sinking of the Middle Atmosphere, Moscow-98, First International workshop on “Long term Changes and trends in the atmosphere”, Pune, India, February 1999.
15. Major Greenhouse Cooling and Chemical Changes in the Middle Atmosphere "National Workshop on Atmospheric Chemistry", Pune, India October 12-14, 1999.
16. Photo-Chemical Modelling of the Middle Atmosphere, In SERC-school held at IITM, Pune, India, June-July, 2000.
17. Global Change and the Middle Atmosphere, In SERC-school held at IITM, Pune, India, June-July, 2000.
18. Modelling of O3, NOx and CO over INDOEX region, INDOEX Workshop on Tropical Environmental Problems, Palampur, October 9-13, 2000.
19. A new approach to the global electric circuit conception and its application to ozone problem, IInd SERC school Proceeding book- "Cloud Physics and Atmospheric Electricity -Frontiers", Pune, India, June-July, 2001.
20. Long Term Trends in Temperature of the Middle Atmosphere over the Tropics, National Space Science Symposium (NSSS-2002), Bhopal, MP, March 25-28, 2002.
21. Chemical-climate change scenario over India with special reference to Himalayan region 22. Brain Storming Session on Mountain Environment and Climate Change, Shimla, H.P., March 14-15, 2003.
23. The Solar Response to the Middle Atmosphere, Workshop /Brain Storming Session on Climate and Weather of Sun-Earth System (CAWSES), Trivandrum, 29-30, October2003
24. Acid Rain and Atmospheric Pollution Modeling, Environmental Information Systems (ENVIS) Workshop, Bhubneshawar, November 8-9, 2003
25. Gridding CO Emissions Over India Using GIS Techniques and modelling ozone pollutants, INDO-US Workshop on modeling the transport of Pollutants, Nagpur, November 11-13, 2003
26. Responses of Global Change in Atmospheric Chemical in Climate, Workshop on “Tropical Atmospheric Chemistry and Aerosols”, PRL, Ahmedabad, March 25, 2004.
27. Chemical Modeling for middle and lower atmosphere using Mozart Model, ADCOS Brain Storming meeting on “Chemical Modeling for Climate Change and Air Pollution Studies”, Bangalore, September 30, 2004.
28. Greenhouse Cooling of the Atmosphere, India Meteorological Society, IITM, Pune, Nov. 2, 2004.
29. Ozone Pollution: Indian Scenario, IASTA meeting and international conference on Aerosols, Clouds and Indian Monsoon, Kanpur, November 16, 2004.
30. Greenhouse effect in the upper atmosphere, Physical Research Laboratory, Ahmedabad, 11, Nov. 2005.
31. Acid rain and atmospheric pollutants, Evaluation workshop of the Western region, Center for Environmental Education, Ahmedabad, 25-26 Nov. 2005.
32. Ion chemistry in the troposphere and stratosphere, Atmospheric chemistry workshop of DST-PAMC, University of Rajasthan, Jaipur, Sep. 28, 2005
33. Atmospheric trace gases and their environmental and climatic impacts, XIV National Space Science Symposium, Visakhapatnam, 9-12 February, 2006.
34. Atmospheric chemistry and global change, International Geosphere Biosphere Program (IGBP) workshop on Global Change, IITM, Pune, 3 March 2006. (b) Chaired scientific International Conference /Symposium
(c) Scientific International Conference /Symposium Organized
(1) Convener Workshop: IGBP Workshop on Global Change Sponsors: Indian National Science Academy, New Delhi and IGBP, Sweden Venue: IITM, Pune, India Date: March 3, 2006
(2) Co-ordinator Meeting: 21st session of the Scientific Committee of International Geosphere-Biosphere Programme Sponsors: International Geosphere-Biosphere Programme , Sweden Venue: IITM, Pune, India Date: March 4-7, 2006 (3) Convener Symposium: JSMA03 “Short-term variability and long-term changes in the lower and middle atmosphere” in the IAGA Scientific Assembly Sponsors: International Association of Geomagnetism and Aeronomy (IAGA) Venue: Toulouse, France Date:July 18-29, 2005
(4) International Scientific Program Committee Member Symposium “Climatological Variations in the Upper Atmosphere and Ionosphere” of Spring Joint Assembly of the American Geophysical Union (AGU) Sponsors: American Geophysical Union (AGU) Venue: New Orleans, Louisiana, USA Date: 23-27 May 2005.
(5) Convener Title of Symposium: Challenges of Global Change in Forcing from Below and Above Sponsor: International Union of Geodesy and Geophysics Venue: Sapporo, Japan Date: June 30- July 12, 2003
(6) International Scientific Program Committee Member Title of Symposium: 3rd International Workshop on "Long Term Changes and Trends in the Atmosphere”. Sponsor: Trend Working Group of IAGA (IUGG) Venue: Sozopol, Bulgaria Date: 9-14 June 2004
(7) Chairman, International scientific programme committee; Convener and Scientific Secretary for LOC and NOC for the First International workshop on "Long Term Changes and Trends in the Atmosphere" Venue: Indian Institute of Tropical Meteorology, Pune, India Date: February 16-19, 1999
(8) Convener Symposium: Long term Trends in the Mesosphere Thermosphere Ionosphere System" Venue: Honoi, Vietnam Sponsor: IAGA‑IASPEI joint scientific Assembly Date: 18-30 August, 2001.
(9) Member of Organizing Committee Title of the Workshop: The Second International workshop on "Long Term Changes and Trends in the Atmosphere" Venue: Prague, Czech Republic Date: July 6-10, 2001
(10) Joint Convener Title of Symposium: Permanent Changes in the Atmosphere Venue: Hamburg, Germany Sponsor: 31St COSPAR Scientific Assembly Date: 15-22 July, 1994.
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