干旱区生态环境知识资源中心(Arid): Validation of estimated cloud fraction from MERRA-2 and AIRS data using ground based observation over IAO, Hanle

Arid

DOI	10.1016/j.asr.2020.05.001
	Validation of estimated cloud fraction from MERRA-2 and AIRS data using ground based observation over IAO, Hanle
	Ningombam, Shantikumar S.; Narendra, Aditya; Bhatt, B. C.; Prabhu, T. P.; Anupama, G. C.; Angchuk, Dorje; Jorphail, Sonam
通讯作者	Ningombam, SS
来源期刊	ADVANCES IN SPACE RESEARCH
ISSN	0273-1177
EISSN	1879-1948
出版年	2020
卷号	66 期号:4 页码:826-843
英文摘要	We report for validation of cloud fraction estimated from high-resolution (hourly) data from MERRA-2 and AIRS instrument aboard NASA's Aqua satellite during its ascending and descending orbits with hourly ground-based visual observation taken at Indian Astronomical Observatory (IAO), Hanle during 1997-2018. The study reveals 70% useful nights, equivalent to 254 spectroscopic nights in a year. A comparative study of cloud fraction was performed using homogeneous and continuous data spanning six years (2013-2018) from MERRA-2 and AIRS over IAO, Hanle and Merak sites in the Himalayan region, and several astronomical observatories located in Atacama desert in Chile, Canary islands in Spain, National Astronomical Observatory (NAO), Mexico, and Mauna Loa in Hawaii. The study reveals cloud fractions of 0.07-0.11 at 25% (1st Quartile) and 0.32-0.40 at 50% (median) at the Himalayan sites. On the other hand, the median cloud fractions are 0.06-0.13 at the Chilean sites, 0.16 at NAO, and 0.29 at Canary islands. The observed 25% of the cloud fraction at the Himalayan sites during the lowest three cloud-fractional months (October-December) are comparable with other sites located in Chile and Canary islands. The median cloud fraction at Hanle is slightly lower than Mauna Loa. The study further concluded that the percentage of useful nights obtained from the visual observation (70%) at IAO-Hanle is very close to the percentage of clear sky (68%) estimated from the MERRA-2 data. (C) 2020 COSPAR. Published by Elsevier Ltd. All rights reserved.
英文关键词	Cloud fraction AIRS MERRA-2 Satellite IAO-Hanle
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000546695400007
WOS类目	Engineering, Aerospace ; Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Engineering ; Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324977
作者单位	[Ningombam, Shantikumar S.; Bhatt, B. C.; Prabhu, T. P.; Anupama, G. C.] Indian Inst Astrophys, Bangalore, Karnataka, India; [Angchuk, Dorje; Jorphail, Sonam] Indian Inst Astrophys, Indian Astron Observ, Leh, Ladakh, India
推荐引用方式 GB/T 7714	Ningombam, Shantikumar S.,Narendra, Aditya,Bhatt, B. C.,et al. Validation of estimated cloud fraction from MERRA-2 and AIRS data using ground based observation over IAO, Hanle[J],2020,66(4):826-843.
APA	Ningombam, Shantikumar S..,Narendra, Aditya.,Bhatt, B. C..,Prabhu, T. P..,Anupama, G. C..,...&Jorphail, Sonam.(2020).Validation of estimated cloud fraction from MERRA-2 and AIRS data using ground based observation over IAO, Hanle.ADVANCES IN SPACE RESEARCH,66(4),826-843.
MLA	Ningombam, Shantikumar S.,et al."Validation of estimated cloud fraction from MERRA-2 and AIRS data using ground based observation over IAO, Hanle".ADVANCES IN SPACE RESEARCH 66.4(2020):826-843.