AMSU retrieval precision for mean UTH
نویسندگان
چکیده
A practical demonstration on AMSU retrieval precision for upper tropospheric humidity by a non-linear multi-channel regression method C. Jiménez, P. Eriksson, V. O. John, and S. A. Buehler Institute of Atmospheric and Environmental Science, The University of Edinburgh, Edinburgh, UK Department of Radio and Space Science, Chalmers University of Technology, Gothenburg, Sweden Institute of Environmental Physics, University of Bremen, Bremen, Germany Received: 17 July 2004 – Accepted: 1 October 2004 – Published: 11 November 2004 Correspondence to: C. Jiménez ([email protected])
منابع مشابه
Comparison of AIRS and AMSU-B monthly mean estimates of upper tropospheric humidity
Satellite-borne measurements provide valuable information on the global distribution of upper tropospheric humidity (UTH), which represents the mean relative humidity in a layer approximately enclosed by the atmospheric pressure levels 500 and 200 hPa. Monthly mean distributions of microwave observations of UTH obtained from the Advanced Microwave Sounding Unit-B (AMSU-B) and the Humidity Sound...
متن کاملA practical demonstration on AMSU retrieval precision for upper tropospheric humidity by a non-linear multi-channel regression method
A neural network algorithm inverting selected channels from the Advance Microwave Sounding Unit instruments AMSU-A and AMSU-B was applied to retrieve layer averaged relative humidity. The neural network was trained with a global synthetic dataset representing clear-sky conditions. A precision of around 6% was obtained when retrieving global simulated radiances, the precision deteriorated less t...
متن کاملEffect of cold clouds on satellite measurements near 183 GHz
[1] Near-global analysis of 183 GHz measurements from the NOAA-15 advanced microwave sounding unit (AMSU) B was conducted to investigate the impact of cold (< 240 K at 11 mm) clouds on upper tropospheric humidity (UTH) observations and in assessing the potential for deriving cloud microphysical properties. Collocated advanced very high resolution radiometer (AVHRR) data aided in identifying clo...
متن کاملNear-Surface Air Temperature Retrieval Derived from AMSU-A and Sea Surface Temperature Observations
A 10-m air temperature (Ta) retrieval using Advanced Microwave Sounding Unit A (AMSU-A) and satellite-derived sea surface temperature (Ts) observations is presented. The multivariable linear regression retrieval uses AMSU-A brightness temperatures from the 52.8and 53.6-GHz channels and satellite-derived daily sea surface temperatures to determine Ta. A regression error of 0.838C using 841 match...
متن کاملComparison of microwave satellite humidity data and radiosonde profiles: A survey of European stations
A method to compare upper tropospheric humidity (UTH) from satellite and radiosonde data has been applied to the European radiosonde stations. The method uses microwave data as a benchmark for monitoring the performance of the stations. The present study utilizes three years (2001–2003) of data from channel 18 (183.31±1.00 GHz) of the Advanced Microwave Sounding Unit-B (AMSU-B) aboard the satel...
متن کامل