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Validation of UARS Microwave Limb Sounder 183 GHz H2O MeasurementsThe Upper Atmosphere Research Satellite (UARS) microwave limb sounder (MLS) makes measurements of thermal emission at 183.3 GHz which are used to infer the concentration of water vapor over a pressure range of 46-0.2hPa (approximately 20-60 km). We provide a validation of MLS H2O by analyzing the integrity of the measurements, by providing an error characterization, and by comparison with data from other instruments. It is estimated that version 3 MLS H2O retrievals are accurate to within 20-25% in the lower stratosphere and to within 8-13% in the upper stratosphere and lower mesosphere. The precision of a single profile is estimated to be approximately 0.15 parts per million by volume (ppmv) in the midstratosphere and 0.2 ppmv in the lower and upper stratosphere. In the lower mesosphere the estimate of a single profile precision is 0.25-0.45 ppmv. During polar winter conditions, H2O retrievals at 46 hPa can have a substantial contribution from climatology. The vertical resolution of MLS H2O retrievals is approximately 5 km.
Document ID
19990070749
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lahoz, W. A. (Edinburgh Univ. United Kingdom)
Suttie, M. R. (Edinburgh Univ. United Kingdom)
Froidevaux, L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Harwood, R. S. (Edinburgh Univ. United Kingdom)
Lau, C. L. (Heriot-Watt Univ. Edinburgh, United Kingdom)
Lungu, T. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Peckham, G. E. (Heriot-Watt Univ. Edinburgh, United Kingdom)
Pumphrey, H. C. (Edinburgh Univ. United Kingdom)
Read, W. G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Shippony, Z. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Suttie, R. A. (Heriot-Watt Univ. Edinburgh, United Kingdom)
Waters, J. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Nedoluha, G. E. (Naval Research Lab. Washington, DC United States)
Oltmans, S. J. (National Oceanic and Atmospheric Administration Boulder, CO United States)
Russell, J. M. (NASA Langley Research Center Hampton, VA United States)
Traub, W. A. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA United States)
Date Acquired
August 19, 2013
Publication Date
April 30, 1996
Publication Information
Publication: Journal of Geophysical Research
Volume: 101
Issue: D6
ISSN: 0148-0227
Subject Category
Geophysics
Report/Patent Number
Paper-95JD01703
Distribution Limits
Public
Copyright
Other