dorsal/arxiv
View SchemaGlobal monitoring of tropospheric water vapor with GPS radio occultation aboard CHAMP
| Authors | S. Heise, J. Wickert, G. Beyerle, T. Schmidt, C. Reigber |
|---|---|
| Categories | |
| ArXiv ID | physics/0502085 |
| URL | https://arxiv.org/abs/physics/0502085 |
| DOI | 10.1016/j.asr.2005.06.066 |
Abstract
The paper deals with application of GPS radio occultation (RO) measurements aboard CHAMP for the retrieval of tropospheric water vapor profiles. The GPS RO technique provides a powerful tool for atmospheric sounding which requires no calibration, is not affected by clouds, aerosols or precipitation, and provides an almost uniform global coverage. We briefly overview data processing and retrieval of vertical refractivity, temperature and water vapor profiles from GPS RO observations. CHAMP RO data are available since 2001 with up to 200 high resolution atmospheric profiles per day. Global validation of CHAMP water vapor profiles with radiosonde data reveals a bias of about 0.2 g/kg and a standard deviation of less than 1 g/kg specific humidity in the lower troposphere. We demonstrate potentials of CHAMP RO retrievals for monitoring the mean tropospheric water vapor distribution on a global scale.
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"abstract": "The paper deals with application of GPS radio occultation (RO) measurements\naboard CHAMP for the retrieval of tropospheric water vapor profiles. The GPS RO\ntechnique provides a powerful tool for atmospheric sounding which requires no\ncalibration, is not affected by clouds, aerosols or precipitation, and provides\nan almost uniform global coverage. We briefly overview data processing and\nretrieval of vertical refractivity, temperature and water vapor profiles from\nGPS RO observations. CHAMP RO data are available since 2001 with up to 200 high\nresolution atmospheric profiles per day. Global validation of CHAMP water vapor\nprofiles with radiosonde data reveals a bias of about 0.2 g/kg and a standard\ndeviation of less than 1 g/kg specific humidity in the lower troposphere. We\ndemonstrate potentials of CHAMP RO retrievals for monitoring the mean\ntropospheric water vapor distribution on a global scale.",
"arxiv_id": "physics/0502085",
"authors": [
"S. Heise",
"J. Wickert",
"G. Beyerle",
"T. Schmidt",
"C. Reigber"
],
"categories": [
"physics.ao-ph"
],
"doi": "10.1016/j.asr.2005.06.066",
"title": "Global monitoring of tropospheric water vapor with GPS radio occultation aboard CHAMP",
"url": "https://arxiv.org/abs/physics/0502085"
},
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