Prof.Y. Nazeer Ahammed
08562-225486 (Off.),08562-225419 (FAX),9491944454 (M)
nazeer@yogivemanauniversity.ac.in , ynahammed@gmail.com
Qualification :
Ph.D. (1996) Dept of Physics , Sri Krishnadevaraya University, Anantapur (A.P.) .
PDF/Teaching Experience :
October 2015 – till date Professor of Physics, Yogi Vemana University, Kadapa.
Oct 2009 – Till to date Associate Professor, Yogi Vemana University, Kadapa.
Aug 2004 – Oct 2009 Scientist – C, National Physical Laboratory, New Delhi.
May 1998 – Aug 2004 Research Scientist, Sri Krishnadevaraya University, Anantapur.
July1996 – May1998 Senior Research Fellow, Sri Krishnadevaraya University, Anantapur.
Area/s of research interests :
Spectroscopy, Atmospheric Physics.
Number of Ph.Ds awarded under Research Supervision: 01,
Dr. I. Kishore Kumar Reddy on “Radiative forcing due to regional atmospheric aerosols & clouds”.
Research Focus :

Description of Research work:

Aerosols have a direct radiative forcing because they scatter and absorb solar and infrared radiation in the atmosphere. Aerosols also alter the formation and precipitation efficiency of liquid water, ice and mixed-phase clouds, thereby causing an indirect radiative forcing associated with these changes in cloud properties. The quantification of aerosol radiative forcing is more complex than the quantification of radiative forcing by greenhouse gases because aerosol mass and particle number concentrations are highly variable in space and time. This variability is largely due to the much shorter atmospheric lifetime of aerosols compared with the important greenhouse gases.

Spatially and temporally resolved information on the atmospheric burden and radiative properties of aerosols is needed to estimate radiative forcing. Important parameters are size distribution, change in size with relative humidity, complex refractive index, and solubility of aerosol particles. Estimating radiative forcing also requires an ability to distinguish natural and anthropogenic aerosols.

Aerosol Climate effects - Lack of spatial and temporal variation of aerosols is the largest sources of uncertainty in assessments of anthropogenic climate change. Uncertain whether aerosol increase cause a net increase or decrease in average global temperature. For mineral dust and the aerosol indirect effect, no estimates of the forcing, only uncertainty ranges. The dominant effect of atmospheric particles is a negative forcing (cooling)? Uncertainty in aerosol forcing must be reduced at least 3-fold for uncertainty in climate sensitivity to be meaningfully reduced and bounded.

Aerosol Radiative Forcing over India (ARFI) is national project of Indian Space Research Organization under Geosphere Biosphere Programme (ISRO-GBO), implemented through Space Physics Laboratory, Trivandrum. It is aim at evolving accurate regional aerosol characterization, incorporating the heterogeneities in space, time and spectral domains for periodical and accurate estimates of Aerosol Radiative Forcing over India and to assess the impacts on regional and global climate. In 2010, a network station as a part of ARFINET was sanctioned and operational at Yogi Vemana University, Kadapa.

Scientific objectives of ISRO-GBP: ARFI-YVU Project:

To establish aerosol characteristics at a rural semi-arid site Kadapa.

To study short-term and long-term variations in radiative forcing due to regional atmospheric aerosols as well as the physical processes involved.

Projects undertaken :
1. Study of Oceanographic Processes of North Indian Ocean in reference to global change,Sponsored by CSIR Network in 2003-2008 as a Member.
2. Estimates of Indoor Air pollutants emitted from Fuels used in residential sector of northern India,Sponsored by CSIR-External in 2006-2009 as a Co-PI.
3. Study on the effects of Atmospheric dynamical activity (Long and short term) in the tropical tropopause region: Implication on the stratosphere-Troposphere exchange of the minor constituents, Sponsored by ISRO, Bangalore in 2006-2009 as a Co-PI.
4. Snow-pack production of Carbon monoxide and its diurnal variability,Sponsored by NCAOR (Mo ES), Goa in 2007-2010 as a Co-PI.
5. Radiative forcing due to regional atmospheric aerosols at Kadapa, Andhra Pradesh,Sponsored by ISRO, Bangalore in 2010-2013 as a PI.
Ms. G. Reshma Begam - Studies on regional atmospheric aerosols and their effects.
Mr. C. Viswanatha Vachaspati - Radiative forcing due to regional atmospheric aerosols over semi-arid environment.
Mr. Nageswara Rao – Long term studies on Regional atmospheric aerosols over semi-arid station.
Foreign visits:

1) Participated in “Ocean Processes in relation to changing climate in Asia-Oceania Program” of Joint CSIR, India-NSFC, China at Qingdao, China

2) Member of “First Winter Phase Indian Arctic Expedition” at Ny-Alesund, Arctic and conducted Atmospheric Science Experiments.

3) Member of “Second Phase Summer Indian Arctic Expedition” at Ny-Alesund, Arctic and conducted Atmospheric Science Experiments.

Membership in prestigious academic bodies:

Life member of Indian Aerosol Science and Technology Association, India

Achievements/Awards :
1) Member of ORV Sagar Kanya Cruise (SK-193) as a part of ARMEX Programme.
2) Member of National level Land Campaign under ISRO–Geosphere Biosphere Programme.
3) Member of ORV Sagar Kanya Cruise (SK-212) as a part of CSIR Network Programme.
4) Member of ISRO-GBP Special Aerosol Land Campaign.
5) Member of Biomass burning experiment at Arunachal Pradesh under CSIR Programme.
6) Member of ORV Sagar Kanya Cruise (SK223) under ISRO-GBP:ICARB Programme.
7) Member of “First Winter Phase Indian Arctic Expedition” at Ny-Alesund, Arctic.
8) Member of “Second Phase Summer Indian Arctic Expedition” at Ny-Alesund, Arctic.
Countries visited :
China, Norway
Research Publications in National & International SCI Journals : 95
(For more details please visit the link below)
Research papers presented at National and International Seminar/Symposium/Workshop :
Details of significant paper publications :
1. Winter time Spatial characteristics of Boundary layer aerosols over Peninsular India; K.Krishna Moorthy, S.V.Sunilkumar, Preetha S. Pillai, K. Parameswaran, Prabha R. Nair, Y. Nazeer Ahammed, K. Rama Gopal, K. Narasimhulu, R. Ramakrishna Reddy, V. Vinod, S. K. Satheesh, K.Niranjan, B. Malleswara Rao, P.S.Brahmanandam, Auromeet Seha, K.V.S. Badarinath and K. Madhavi Latha, Journal of Geophysical Research, 110, D08207, doi: 10.1029/2004JD005520 (2005).
2. Seasonal variation of the surface ozone and its precursor gases during 2001-2003, measured at Anantapur (14.62ON), a semi-arid site in India; Y. Nazeer Ahammed, R.R.Reddy, K. Rama Gopal, K. Narasimhulu, D. Baba Basha, L. Siva Sanakara Reddy, T.V.R.Rao, Atmospheric Research, 80, 151 (2006).
3. Temporal and Spatial Variability of Surface Ozone at Delhi and Antarctica; Sachin D. Ghude, S. L. Jain, B. C. Arya, P. S. Kulkarni, Ashok Kumar and Y. Nazeer Ahammed, International Journal of Climatology, 26, 2227-2242 (2006).
4. Latitudinal distribution of aerosol black carbon and its mass fraction to composite aerosols over peninsular India during winter season; K. Krishna Moorthy, S. Suresh Babu, K.V.S. Badrinath, S.V. Sunilkumar, T.R. Kiranchand and Y. Nazeer Ahammed, Geophysical Research Letters, 34, L08802, doi:10.1029/2006GL029150 (2007).
5. Ozone in ambient air at a tropical megacity, Delhi: characteristics, trends and cumulative ozone exposure indices, Sachin D. Ghude, S. L. Jain, B. C. Arya, G. Beig, Y. N. Ahammed, Arun Kumar and B. Tyagi, Journal of Atmospheric Chemistry, DOI 10.1007/s10874-009-9119-4 (2009).
6. Indigenous design and development of a micro-pulse lidar for atmospheric studies, P.K. Dubey, S.L. Jain, B.C. Arya, Y.N. Ahammed, Arun Kumar, D.K. Shukla and Pavan Kulakarni, International Journal of Remote Sensing, TRES-PAP-2009-0065.R2 (2009).
7. Quasi-biennial oscillations in spectral aerosol optical depth, S. Naseema Beegum, K. Krishna Moorthy, S. Suresh Babu, R. Ramakrishna Reddy, K. Rama Gopal and Y. Nazeer Ahammed, Atmospheric Science Letters, DOI: 10.1002/asl.243 (2009).
8. Seasonal variability of ambient NH3, NO, NO2 and SO2 over Delhi, S.K. Sharma, A. Datta, T. Saud, M. Saxena, T.K. Mandal, Y.N. Ahammed and B.C. Arya, Journal of Environmental Sciences, 22(7), 1023-1028 (2010).
9. Observational studies on the variations in surface ozone concentration at Anantapur in southernIndia, B. Suresh Kumar Reddy, K. Raghavendra Kumar, G. Balakrishnaiah, K. Rama Gopal, R. R. Reddy, Y. Nazeer Ahammed, K. Narasimhulu, L. Siva Sankara Reddy and Shyam Lal, Atmospheric Research, 98, 125-139 (2010).
10. Variations in Mixing Ratios of Ambient Ammonia, Nitric Oxide and Nitrogen Dioxide in Different Environments of India, S.K. Sharma, M. Saxena, T.K. Mandal, Y.N. Ahammed, H. Pathak, A. Datta, T. Saud and B.C. Arya, J Earth Sci Climate Change 2010, 1:1, http://dx.doi.org/10.4172/2157-7617.1000102.

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