17TH Conference on Hydrology
12th Symposium on Meteorological Observations and Instrumentation


Detection of water vapor profiles and thin moisture layers from atmospheric radio occultations

Manuel de la Torre Juárez, JPL/Caltech, Pasadena, CA; and P. M. Nilsson

GPS radio occultations provide high-resolution vertical profiles of the atmospheric refraction index that can be used to extract vertical profiles of tropospheric moisture content. A physical method to extract water abundances from refraction index profiles without using ancillary data nor model input is described and the results are compared with other current approaches. The ability to capture sharp water structures is illustrated by comparisons with radiosonde measurements and global circulation analyses from NCEP and ECMWF. It is shown that the method described is able to detect thin layers of water, and allows retrieving atmospheric water profiles in cases where the ancillary data are not optimal.

Joint Session 9, Satellite Measurements: Hydrological Impact and Land Surface Data Assimilation (Joint with the 17th Conference on Hydrology and the 12th Symposium on Meteorological Observations and Instrumentation
Thursday, 13 February 2003, 8:30 AM-12:15 PM

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