气候变化领域集成服务门户(CCPortal): Effect of monsoon dynamics and deep convection on the upper troposphere lower stratosphere water vapour over Indian monsoon region

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DOI	10.1016/j.atmosres.2020.105336
	Effect of monsoon dynamics and deep convection on the upper troposphere lower stratosphere water vapour over Indian monsoon region
	Emmanuel M.; Sunilkumar S.V.; Muhsin M.; Satheesh Chandran P.R.; Parameswaran K.; Kumar B.S.; Maitra A.; Satyanarayana A.N.V.; Nagendra N.
发表日期	2021
ISSN	0169-8095
卷号	249
英文摘要	Balloon-borne cryogenic frost-point hygrometer (CFH) observations conducted over three stations Trivandrum, Hyderabad and Kolkata in the Indian region during the period 2014–2017 are used to study the influence of deep convection and monsoon dynamics on the distribution of water vapour in the upper troposphere and lower stratosphere (UTLS) and to quantify the amount of water vapour transported to the lower stratosphere (LS) during summer-monsoon (June to September). In summer monsoon season, CFH observations show a water vapour enhancement of ~40–250% in the upper troposphere (UT) and 0.5–1 ppmv (10–40%) in the LS compared to pre-monsoon. In this season, the spatial pattern of Microwave Limb Sounder (MLS) derived water vapour mixing ratio (WVMR) at 100 hPa peaks north of the deep convection core over the head Bay of Bengal (BoB). In the LS, the water vapour maximum shows a south westward shift with altitude in accordance with the anticyclonic circulation flow. The maximum altitude of deep convective cloud top increases north eastward in accordance with the peak in tropical easterly jet (TEJ) causing the altitudinal shift in water vapour enhancement in the UT. The probability of dehydration (WVMR<3 ppmv) maximizes west of the deep convective core over Head BoB. During summer-monsoon, the day-to-day variability of water vapour in the tropical tropopause layer (TTL) is mainly controlled by the dehydration of air due to freeze drying (temperature dependent) and rehydration due to recurrent overshooting deep convections. Direct injection of water vapour into the LS region is probable when the tropopause is relatively warm (>192 K). © 2020 Elsevier B.V.
英文关键词	CFH; Deep convection; Monsoon dynamics; UTLS; Water vapour
语种	英语
scopus关键词	Atmospheric thermodynamics; Clouds; Dehydration; Direct injection; Natural convection; Tropics; Troposphere; Anticyclonic circulation; Day-to-day variability; Deep convective clouds; Distribution of water; Microwave limb sounder; Temperature dependent; Tropical easterly jets; Tropical tropopause layers; Water vapor; anticyclone; atmospheric convection; atmospheric dynamics; microwave limb sounder; mixing ratio; monsoon; stratosphere; troposphere; water vapor; Bay of Bengal; Hyderabad [Telangana]; India; Indian Ocean; Kerala; Telangana; Thiruvananthapuram
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/145206
作者单位	Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, 695022, India; Department of Physics, National Institute of Technology, Calicut, 673601, India; 106, Vinayak Nagar, Pappanamcode, Trivandrum, 695018, India; Tata Institute of Fundamental Research Balloon Facility, Hyderabad, 500062, India; Institute of Radio Physics and Electronics, University of Calcutta, Kolkata, 700009, India; IIT Kharagpur, Kharagpur, 721302, India; Department of Physics, University of Kerala, Trivandrum, 695034, India
推荐引用方式 GB/T 7714	Emmanuel M.,Sunilkumar S.V.,Muhsin M.,et al. Effect of monsoon dynamics and deep convection on the upper troposphere lower stratosphere water vapour over Indian monsoon region[J],2021,249.
APA	Emmanuel M..,Sunilkumar S.V..,Muhsin M..,Satheesh Chandran P.R..,Parameswaran K..,...&Nagendra N..(2021).Effect of monsoon dynamics and deep convection on the upper troposphere lower stratosphere water vapour over Indian monsoon region.Atmospheric Research,249.
MLA	Emmanuel M.,et al."Effect of monsoon dynamics and deep convection on the upper troposphere lower stratosphere water vapour over Indian monsoon region".Atmospheric Research 249(2021).