气候变化领域集成服务门户(CCPortal): Assessment of vertical air motion among reanalyses and qualitative comparison with very-high-frequency radar measurements over two tropical stations

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DOI	10.5194/acp-21-2083-2021
	Assessment of vertical air motion among reanalyses and qualitative comparison with very-high-frequency radar measurements over two tropical stations
	Narasimhan Uma K.; Shankar Das S.; Venkat Ratnam M.; Viswanathan Suneeth K.
发表日期	2021
ISSN	1680-7316
起始页码	2083
结束页码	2103
卷号	21 期号:3
英文摘要	Vertical wind (w) is one of the most important meteorological parameters for understanding a range of different atmospheric phenomena. Very few direct measurements of w are available so that most of the time one must depend on reanalysis products. In the present study, assessment of w among selected reanalyses (ERA-Interim, ERAi; ERA fifth generation, ERA5; Modern-Era Retrospective analysis for Research and Applications, version 2, MERRA-2; National Center for Atmospheric Research and Depart- ment of Energy reanalysis, NCEP-DOE (R-2); and Japanese 55- year reanalysis, JRA-55) and qualitative comparison of those datasets with VHF radar measurements over the convectively active regions Gadanki, India (13.5 N, 79.2 E), and Kototabang, Indonesia (0 S, 100.2 E), are presented for the first time in the troposphere and lower stratosphere. The magnitude of w derived from reanalyses is 10 %-50%less than that from the radar observations. Radar measurements of w show downdrafts below 8 and 10 km and updrafts above 8-10 km over both locations. Intercomparison between the ensemble of reanalyses with respect to individual reanalysis shows that ERAi, MERRA-2 and JRA-55 compare well with the ensemble compared to ERA5 and NCEP-DOE (R-2). There is no significant improvement in w due to the effect of different spatial sampling for reanalysis data around the Gadanki station. Directional tendency shows that the percentage of updrafts captured is reasonably good, but downdrafts are not well captured by all reanalyses. Thus, caution is advised when using w from reanalyses. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	comparative study; convective system; data set; qualitative analysis; radar; stratosphere-troposphere interaction; tropical meteorology; wind; Gadanki; India; Indonesia; Kototabang; Tamil Nadu; West Sumatra
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247153
作者单位	Space Physics Laboratory, Vikram Sarabhai Space Centre Isro, Trivandrum, 695022, India; National Atmospheric Research Laboratory, Department of Space, Gadanki, 17112, India; India Meteorological Department, Ministry of Earth Sciences, New Delhi, 110003, India
推荐引用方式 GB/T 7714	Narasimhan Uma K.,Shankar Das S.,Venkat Ratnam M.,et al. Assessment of vertical air motion among reanalyses and qualitative comparison with very-high-frequency radar measurements over two tropical stations[J],2021,21(3).
APA	Narasimhan Uma K.,Shankar Das S.,Venkat Ratnam M.,&Viswanathan Suneeth K..(2021).Assessment of vertical air motion among reanalyses and qualitative comparison with very-high-frequency radar measurements over two tropical stations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(3).
MLA	Narasimhan Uma K.,et al."Assessment of vertical air motion among reanalyses and qualitative comparison with very-high-frequency radar measurements over two tropical stations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.3(2021).