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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5166

Title: Global (50°S–50°N) distribution of water vapor observed by COSMIC GPS RO: Comparison with GPS radiosonde, NCEP, ERA-Interim, and JRA-25 reanalysis data sets
Authors: Kishore, P
Venkat Ratnam, M
Namboothiri, SP
Velicogna, I
Basha, G
Jiang, JH
Igarashi, K
Rao, SVB
Sivakumar, V
Keywords: Water vapor
Radiosonde
GPS RO
Atmosphere
Solar terrestrial physics
COSMIC GPS RO
Issue Date: Aug-2011
Publisher: Elsevier
Citation: Kishore, P, Venkat Ratnam, M, Namboothiri, SP et al. 2011. Global (50°S–50°N) distribution of water vapor observed by COSMIC GPS RO: Comparison with GPS radiosonde, NCEP, ERA-Interim, and JRA-25 reanalysis data sets. Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 73, pp 1849–1860
Series/Report no.: Workflow request;7115
Abstract: In this study, global (50°S–50°N) distribution of water vapor is investigated using COSMIC GPS RO measurements. Detailed comparisons have been made between COSMIC and high resolution GPS radiosonde measurements across 13 tropical stations and model outputs (ERA-Interim, NCEP, and JRA-25 reanalyses data sets). In comparison with independent techniques like radiosonde (Väisälä), it is found that COSMIC GPS RO wet profiles are accurate up to 7–8 km (assuming radiosonde as standard technique). In general, comparisons with corresponding seasonal means of model outputs are qualitatively in good agreement, although they differ quantitatively especially over convective regions of South America, Africa, and Indonesia. In tropical latitudes, the COSMIC specific humidity values are higher than the model outputs. Among various model outputs, ERA-Interim data set show near realistic features to that observed by COSMIC GPS RO measurements. Large asymmetry in the specific humidity distribution is observed between northern and southern hemispheres.
Description: Copyright: Elsevier 2011. This is a post print version of the work. The definitive version is published the Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 73, pp 1849–1860
URI: http://www.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271871&_user=958262&_pii=S1364682611001283&_check=y&_origin=&_coverDate=31-Aug-2011&view=c&wchp=dGLzVlk-zSkzk&md5=1b0bd1fa538de24fc8249c9fcfc578b1/1-s2.0-S1364682611001283-main.pdf
http://hdl.handle.net/10204/5166
ISSN: 1364-6826
Appears in Collections:Sensor science and technology
Climate change
Earth observation
General science, engineering & technology

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