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Retrieval of vertical wind profiles during monsoon from satellite observed winds over the Indian ocean using complex EOF analysis

Occurrence of heavy rainfall around the confluence line in monsoon disturbances and its importance in causing floods

Journal of Earth System Science : Volume 109

Journal of Earth System Science : Volume 108

Journal of Earth System Science : Volume 107

Journal of Earth System Science : Volume 106

Retrieval of vertical wind profiles during monsoon from satellite observed winds over the Indian ocean using complex EOF analysis

Content Provider	Springer Nature Link
Author	Kishtawal, C. M. Basu, Sujit Karthikeyan, S.
Copyright Year	2001
Abstract	The aim of this paper is to study the feasibility of deriving vertical wind profiles from current satellite observations. With this aim, we carried out complex empirical orthogonal function (CEOF) analysis of a large number of radiosonde observations of wind profiles over the Indian Ocean during the monsoon months. It has been found that the first two CEOFs explain 67% of the total variance in wind fields. While the first principal component is well correlated with the winds at 850 mb (r = 0:80), the second one is highly correlated with winds at 200 mb (r = 0:89). This analysis formed the basis of a retrieval algorithm which ensures the retrieval of vertical profiles of winds using satellite tracked cloud motion vector winds. Under the assumption that accurate measurements of wind are available at the above mentioned levels, the r.m.s. error of retrieval of each component of wind is estimated to range between 2 ms$^{-1}$ and 6 ms$^{-1}$ at different levels, which is much less than the natural variance of winds at these levels. For a better visualization of retrieval, we have provided retrieved and true wind profiles side by side for four typical synoptic conditions during the monsoon season.
Starting Page	77
Ending Page	86
Page Count	10
File Format	PDF
ISSN	02534126
Journal	Journal of Earth System Science
Volume Number	110
Issue Number	1
e-ISSN	0973774X
Language	English
Publisher	Springer India
Publisher Date	2001-01-01
Publisher Institution	Indian Academy of Sciences
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Complex EOF analysis cloud motion vector winds wind profiles retrieval monsoon Geosciences Extraterrestrial Physics, Space Sciences
Content Type	Text
Resource Type	Article
Subject	1900/1901

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