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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
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, Volume 73, No. 13, Year 2011
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Description
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. © 2011 Elsevier Ltd.
Authors & Co-Authors
Kishore, Pangaluru
United States, Irvine
University of California, Irvine
Venkat Ratnam, M.
India, Tirupati
National Atmospheric Research Laboratory
Namboothiri, S. P.
India, Thanjavur
Sastra Deemed University
Velicogna, Isabella
United States, Irvine
University of California, Irvine
Basha, Ghouse
India, Tirupati
National Atmospheric Research Laboratory
Jiang, Jonathan H.
United States, Pasadena
Jet Propulsion Laboratory
Igarashi, Kiyoshi
Japan, Tokyo
Assoc of Radio Industries and
Rao, S. Vijaya Bhaskara
India, Tirupati
Sri Venkateswara University
Sivakumar, Venkataraman
South Africa, Pretoria
The Council for Scientific and Industrial Research
Statistics
Citations: 69
Authors: 9
Affiliations: 7
Identifiers
Doi:
10.1016/j.jastp.2011.04.017
ISSN:
13646826
Research Areas
Environmental