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DOI	10.1016/j.atmosres.2021.105540
	Diurnal variation of deep convective clouds over Indian monsoon region and its association with rainfall
	Kottayil A.; Satheesan K.; John V.O.; Antony R.
发表日期	2021
ISSN	0169-8095
卷号	255
英文摘要	Diurnal cycle of deep convective clouds (DCC) over the Indian Summer Monsoon Region is studied. A harmonic analysis has been applied on the 3 hourly deep convective cloud fraction estimated from satellite observations to derive diurnal and semi-diurnal amplitudes of deep convective clouds. The diurnal cycle of deep convective clouds shows seasonal variations and amplitudes which are stronger during the northern hemispheric summer than winter and exhibits prominence over land as compared to ocean. Irrespective of seasons, deep convection peaks in the late evening hours over land whereas the peak is in the afternoon hours over majority of the oceanic regions considered in our study. The reason for the difference is attributed to the semi-diurnal oscillation which determines the oceanic diurnal cycle of deep convection. Various parameters which represent the tropospheric instability are equally affected by the semi-diurnal oscillation as in deep convective clouds over ocean. These results suggest that diurnal tides could play a key role in governing the daily cycle of deep convective clouds over oceanic regions. The relation between diurnal amplitudes of DCC and rainfall is also explored and it is shown that the strength of the daily cycle of DCC has a strong bearing on the amount of rainfall observed over the Indian summer monsoon region. © 2021 Elsevier B.V.
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236799
作者单位	Advanced Centre for Atmospheric Radar Research, Cochin University of Science And Technology, Kochi, India; Department of Atmospheric Sciences, Cochin University of Science And Technology, Kochi, India; EUMETSAT, Eumetsat Allee 1, Darmstadt, 64295, Germany
推荐引用方式 GB/T 7714	Kottayil A.,Satheesan K.,John V.O.,et al. Diurnal variation of deep convective clouds over Indian monsoon region and its association with rainfall[J],2021,255.
APA	Kottayil A.,Satheesan K.,John V.O.,&Antony R..(2021).Diurnal variation of deep convective clouds over Indian monsoon region and its association with rainfall.Atmospheric Research,255.
MLA	Kottayil A.,et al."Diurnal variation of deep convective clouds over Indian monsoon region and its association with rainfall".Atmospheric Research 255(2021).