IJCRR - 5(6), March, 2013
PERSISTANCE ANALYSIS OF AEROSOLS AND ITS IMPACT ON RAINFALL QUANTITY AT CHENNAI
Author: K. Padma, R. Samuel Selvaraj, B. Milton Boaz
Category: General Sciences
Aerosol plays an important role in the radiation budget of Earth’s atmospheric system. They serve as cloud condensation nuclei and have a substantial effect on cloud properties. Large concentrations of human made aerosol have been reported to decrease the rainfall as a result of their radioactive and Cloud condensation Nucleus (CCN) activities. On the other hand, heavily polluted clouds evaporate much of their water before precipitation could occur. This paper concentrates at Chennai (13o 04’ N 80o 17’ E), situated in the north east of Tamil Nadu on the coast of Bay of Bengal. Aerosol generated in urban areas can act to suppress rainfall which inhibits the collision and coalescence process. Moreover, increased, decreased trend of rainfall quantity recorded during the years 1987 - 2009 on this coastal urban area had been analyzed. Correlation Coefficient between aerosol and rainfall quantity were found using Spearman Rank Correlation technique. Hurst exponent had also found to study the behavior of aerosol concentration on the 262 days time series data observed over the year 2010.
Keywords: Aerosol, rainfall quantity
K. Padma, R. Samuel Selvaraj, B. Milton Boaz. PERSISTANCE ANALYSIS OF AEROSOLS AND ITS IMPACT ON RAINFALL QUANTITY AT CHENNAI International Journal of Current Research and Review. 5(6), March, 01-06
1. Madhavi Latha. K., Krishna Prasad. V and Badarinath.K.V.S. 2003. Aerosol characteristic and radiative forcing over industrial areas of urban environment – A case study from Hyderabad and its environs. J. Ind. Geophy. Union (2003), Vol.7. No, pp.25-29.
2. Deepti saxena, R.Yadav, Adarsh kumar and Jagdish Rai, 2010. Measurement of atmospheric aerosol during monsoon and winter seasons at Roorkee, India, Indian journal of Radio & space physics, Vol.39.
3. Cheng, y., Lohmann, U, Zhang, J., Liu, Y. and Lesins. G, 2005. Contribution of changes in sea temperature and aerosol loading to the decreasing precipitation trend in southern China, Jr. Climate, 18, 1381-1390.
4. Gong, D.Y.and C.H.Ho, 2007. Shift in the summer rainfall over the Yangtze aaariver valley in the late 1970s, Geophy. Res. Lett. 29, 1436.
5. Yong-Sang Choi and Chang-Hoi Ho, Jinwon Kim, Dao-Yi Gong, Rokjin J.Park 2007. The impact of Aerosols on the summer rainfall frequency in China, Journal of Applied meteorology and climatology, Vol.47, pp. 1802-1813.
6. Ramanathan, Crutyzen V.P.J, Kieh J. Tl., and Rosenfield.D. 2001. Aerosols, climate, and the hydrological cycle, Science, 294, 2119- 2124.
7. Kaufman, Koren Y. J. I, Remer, D. Rosenfeld L. A., and Rudich.Y. 2005. The effect of smoke, dust and pollution aerosol on shallow cloud development over the Atlantic Ocean. Pro. Natl. Acad. Sci. USA, 102, 11207- 11312.
8. Johnson et al. B.T., 2003. The semi–direct effect: Impact of absorbing aerosol on marine stratocumulus, Q. J. R. Meteorol. Soc. 130, 1407 – 1422
9. Penner J.E., QWuaas J., Storelvma T.,Takemura.,T.,.Boucher Kirkevag .K, Kristijansson J.E., and Seland O..2006. Model intercomparison of indirect aerosol ffects.,A tmos.Chem.Phys,Vol.6.3391-3405.
10. Twomey. S., 1974. Pollution and the planetary albedo, Atmos, Environ. 8, 1251- 1256.
11. Ackerman, A. S., Kirkpatrick, M. P., Stevens, D. E., and Toon, O. B, 2004. The impact of humidity above sraitiform clouds on indirect aerosol climate forcing, Nature, 1014-1017.
12. Amir Givati and Daniel Rosenfield, 2004. Quantifying precipitation suppression due to Air Pollution, AMS Journals online, Vol. 43, issue7.
13. Mark Z. Jacobson and Yoram J, Kaufman. November 2006. Wind reduction by aerosol particle. Geo Physical letters, Vol. 33.