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DOI10.1007/s00382-019-04857-3
Statistical characteristics of the cloud cells in the categories of pre-convective, convective-initiation and convective-enhancement in the contrasting monsoon seasons over the rain-shadow region of peninsular India
Morwal, S. B.1; Padmakumari, B.1; Narkhedkar, S. G.1; Reddy, Y. K.2; Maheskumar, R. S.3; Pandithurai, G.1; Kulkarni, J. R.1
2019-08-01
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
卷号53页码:2355-2374
文章类型Article
语种英语
国家India
英文摘要

The cloud cells are categorized into six categories based on the radar reflectivity data obtained from Hyderabad S-band radar for the excess (2013) and deficient (2014) summer monsoon seasons. Among these, three categories (pre-convective, PC:19-27.5 dBZ, convective-initiation, CI: 28-36.5 dBZ and convective-enhancement, CE:37-45.5 dBZ) constitute about 59-64% of the total cloud population and play a vital role in the total rainfall. The monsoons are classified into excess/deficient if the seasonal rainfalls are more/less by 10% from the climatological mean. The study showed that on the daily scale, occurrence of these cells is ubiquitous feature of this rain-shadow region. Persistent formation of cells is due to large scale monsoon circulation and solar heating. On the intraseasonal scale monsoon conditions are classified into active/break conditions based on rainfall activity. Prevalence of high moisture (>80%) and upward vertical velocity (up to 200hPa) are responsible for high occurrence of cells in the active conditions. The solar heating is conducive for formation of cells in the break monsoon conditions and in the afternoon hours. Mean rate of transition from lower to higher level of convection intensity is -0.72. The clouds in the states of PC, CI and CE show maximum/minimum values in the local afternoon/morning hours. The linkages established using multivariate regression analysis between VL category cells and the large-scale dynamic parameters and solar heating showed dominant role of these processes in the statistical prediction of number of these cells. The spatio-temporal variability of these cells will be useful for understanding the evolution of convection and modeling studies.


英文关键词Convection using radar Rain-shadow region Pre-convective Convective-initiation Convective-enhancement Dynamical processes Thermodynamical processes Bowen ratio
领域气候变化
收录类别SCI-E
WOS记录号WOS:000475558800065
WOS关键词SEEDING EXPERIMENTS ; PRECIPITATION ; CUMULUS ; EVOLUTION ; SHEAR ; RATIO ; ASIA
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/185459
专题气候变化
作者单位1.Indian Inst Trop Meteorol, Pune 411008, Maharashtra, India;
2.Indian Meteorol Dept, Hyderabad, India;
3.Minist Earth Sci, Lodhi Rd, New Delhi, India
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Morwal, S. B.,Padmakumari, B.,Narkhedkar, S. G.,et al. Statistical characteristics of the cloud cells in the categories of pre-convective, convective-initiation and convective-enhancement in the contrasting monsoon seasons over the rain-shadow region of peninsular India[J]. CLIMATE DYNAMICS,2019,53:2355-2374.
APA Morwal, S. B..,Padmakumari, B..,Narkhedkar, S. G..,Reddy, Y. K..,Maheskumar, R. S..,...&Kulkarni, J. R..(2019).Statistical characteristics of the cloud cells in the categories of pre-convective, convective-initiation and convective-enhancement in the contrasting monsoon seasons over the rain-shadow region of peninsular India.CLIMATE DYNAMICS,53,2355-2374.
MLA Morwal, S. B.,et al."Statistical characteristics of the cloud cells in the categories of pre-convective, convective-initiation and convective-enhancement in the contrasting monsoon seasons over the rain-shadow region of peninsular India".CLIMATE DYNAMICS 53(2019):2355-2374.
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