@article { ISI:000282830500007,
	title = {Unusual central indian drought of summer monsoon 2008: role of southern tropical indian ocean warming},
	journal = {Journal of Climate},
	volume = {23},
	number = {19},
	year = {2010},
	month = {OCT},
	pages = {5163-5174},
	publisher = {AMER METEOROLOGICAL SOC},
	address = {45 BEACON ST, BOSTON, MA 02108-3693 USA},
	abstract = {<p>While many of the previous positive Indian Ocean dipole (IOD) years were associated with above (below)normal monsoon rainfall over central (southern) India during summer monsoon months [June-September (JJAS)], the IOD event in 2008 is associated with below (above)-normal rainfall in many parts of central (southern peninsular) India. Because understanding such regional organization is a key for success in regional prediction, using different datasets and atmospheric model simulations, the reasons for this abnormal behavior of the monsoon in 2008 are explored. Compared to normal positive IOD events, sea surface temperature (SST) and rainfall in the southern tropical Indian Ocean (STIO) in JJAS 2008 were abnormally high. Downwelling Rossby waves and oceanic heat advection played an important role in warming SST abnormally in the STIO. It was also found that the combined influence of a linear warming trend in the tropical Indian Ocean and warming associated with the IOD have resulted in abnormal warming of the STIO. This abnormal SST warming resulted in enhancement of convection in the southwest tropical Indian Ocean and forced anticyclonic circulation anomalies over the Bay of Bengal and central India, leading to suppressed rainfall over this region in JJAS 2008. The above mechanism is tested by conducting several model sensitivity experiments with an atmospheric general circulation model (AGCM). These experiments confirmed that the subsidence over central India and the Bay of Bengal was forced mainly by the anomalous warming in the STIO region driven by coupled ocean-atmosphere processes. This study provides the first evidence of combined Indian Ocean warming, associated with global warming, and IOD-related warming influence on Indian summer monsoon rainfall. The combined influence may force below-normal rainfall over central India by inducing strong convection in the STIO region. The conventional seesaw in convection between the Indian subcontinent and the eastern equatorial Indian Ocean may shift to the central equatorial Indian Ocean and the Bay of Bengal if the central Indian Ocean consistently warms in the global warming scenario.</p>},
	issn = {0894-8755},
	doi = {10.1175/2010JCLI3257.1},
	author = {Rao, Suryachandra A. and Chaudhari, Hemantkumar S. and Pokhrel, Samir and Goswami, B. N.}
}
@article { ISI:000327053200023,
	title = {High-resolution outgoing longwave radiation dataset from Kalpana-1 satellite during 2004-2012},
	journal = {Current Science},
	volume = {105},
	number = {8},
	year = {2013},
	month = {OCT},
	pages = {1124-1133},
	publisher = {INDIAN ACAD SCIENCES},
	address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA},
	abstract = {<p>Long record of high-resolution quality-controlled outgoing longwave radiation (OLR) from geostationary platforms like Kalpana-1 has the potential not only to provide detailed information of cloud types contributing to the measure of rain, but also helps unravel convective cloud organization in the tropics from small scale to meso- and synoptic scales. A research quality product of three hourly OLR for the period May 2004 June 2012 is produced from Kalpana-1 very high resolution radiometer (VHRR) radiances over the Indian region (40 degrees S-40 degrees N, 25-125 degrees E) in a regular grid of 0.25 x 0.25 degrees. The quality and usefulness of the dataset is demonstrated here using some illustrative examples. Although these data are available for a relatively short-period, it is shown that they will be potentially more useful than the widely used OLR from NOAA satellites in representing the annual cycles, particularly over the desert and humid oceans, due to their frequent sampling and quality. The active-break periods in the Indian summer monsoon picked up by both the OLR match well. This three hourly OLR estimated from Kalpana-1 VHRR is able to describe the fine-scale structure of the diurnal variation over the region.</p>},
	keywords = {Active break periods, diurnal variation, geostationary platforms, outgoing longwave radiation},
	issn = {0011-3891},
	author = {Mahakur, M. and Prabhu, A. and Sharma, A. K. and Rao, V. R. and Senroy, S. and Singh, Randhir and Goswami, B. N.}
}
