Estimating atmospheric boundary layer depth using COSMIC radio occultation data

This study presents an algorithm for estimating atmospheric boundary layer (ABL) depth from Global Positioning System (GPS) radio occultation (RO) data. The algorithm is applied to the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) RO data and validated using high-resolution radiosonde data from the island of St. Helena (16.0°S, 5.7°W), tropical (30°S–30°N) radiosondes collocated with RO, and European Centre for Medium-Range Weather Forecasts (ECMWF) high-resolution global analyses. Spatial and temporal variations of the ABL depth obtained from COSMIC RO data for a 1-yr period over tropical and subtropical oceans are analyzed. The results demonstrate the capability of RO data to resolve geographical and seasonal variations of ABL height. The spatial patterns of the variations are consistent with those derived from ECMWF global analysis. However, the ABL heights derived from ECMWF global analysis, on average, are negatively biased against those estimated from COSMIC GPS RO data. These results indicate that GPS RO data can provide useful information on ABL height, which is an important parameter for weather and climate studies.

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Author Guo, Peng
Kuo, Ying-Hwa
Sokolovskiy, Sergey
Lenschow, Donald
Publisher UCAR/NCAR - Library
Publication Date 2011-08-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T19:06:34.823142
Metadata Record Identifier edu.ucar.opensky::articles:17559
Metadata Language eng; USA
Suggested Citation Guo, Peng, Kuo, Ying-Hwa, Sokolovskiy, Sergey, Lenschow, Donald. (2011). Estimating atmospheric boundary layer depth using COSMIC radio occultation data. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7mg7qv3. Accessed 16 March 2025.

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