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DOI	10.1016/j.atmosres.2020.105218
	Pre-monsoon convective events and thermodynamic features of southwest monsoon onset over Kerala; India – A case study
	Anna Mathew T.; Malap N.; Manoj M.G.; Jayarao Y.; Todekar K.; Rakesh V.; Rebello R.; Mohankumar K.; Prabhakaran T.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	The thermodynamic characteristics of the atmosphere during the pre-monsoon thunderstorm period and the transition phase from pre-monsoon to monsoon period over the gateway of Indian summer monsoon is investigated in this study. The study utilizes Stratosphere-Troposphere (ST) wind profiling Radar, Microwave Radiometer, and GPS radiosonde observations. A sharp increase in the boundary-layer and middle-layer moisture content, abrupt changes in the mixing height, lifting condensation level (LCL), convective available potential energy (CAPE), and other thermodynamic variables are noted. The pre-monsoon period is characterized by intermittent deep convection that moistens the middle layers, while stratiform clouds are observed in the monsoon period and deep moist layer is observed. The dry middle-layers observed before the monsoon onset got moistened consistently as the low-level jet strengthened. The LCL height was lower than the mixing height after the onset of monsoon. The wet-bulb zero level (WBZ) height was reduced to 2 km during the pre-monsoon and shifted gradually to higher altitudes as the onset of monsoon occurs. Variations in WBZ height may help in the predictability of monsoon onset. The study has also investigated the characteristics of a thunderstorm event before the onset and suitable indices for early indication of the storm. © 2020 Elsevier B.V.
英文关键词	Microwave radiometer; Monsoon; Onset; Thermodynamics; VHF Radar
语种	英语
scopus关键词	Boundary layer flow; Boundary layers; Microwave devices; Mixing; Phase transitions; Potential energy; Radiosondes; Thunderstorms; Convective available potential energies; Indian summer monsoon; Lifting condensation levels; Microwave radiometers; Radiosonde observations; Thermodynamic characteristics; Thermodynamic variables; Wind-profiling radar; Atmospheric thermodynamics; atmospheric convection; GPS; monsoon; potential energy; satellite data; satellite imagery; stratosphere-troposphere interaction; thermodynamics; thunderstorm; India; Kerala
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/141687
作者单位	Department of Atmospheric Sciences, Cochin University of Science and Technology, Cochin, 682016, India; Indian Institute of Tropical Meteorology, Dr. Homi Bhabha Road, Pune, 411008, India; Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Cochin, 682022, India
推荐引用方式 GB/T 7714	Anna Mathew T.,Malap N.,Manoj M.G.,等. Pre-monsoon convective events and thermodynamic features of southwest monsoon onset over Kerala; India – A case study[J],2021,248.
APA	Anna Mathew T..,Malap N..,Manoj M.G..,Jayarao Y..,Todekar K..,...&Prabhakaran T..(2021).Pre-monsoon convective events and thermodynamic features of southwest monsoon onset over Kerala; India – A case study.Atmospheric Research,248.
MLA	Anna Mathew T.,et al."Pre-monsoon convective events and thermodynamic features of southwest monsoon onset over Kerala; India – A case study".Atmospheric Research 248(2021).