OVERVIEW ON VALIDATION OF MIPAS H_2O VAPOUR BY COMPARISON WITH INDEPENDENT SATELLITE MEASUREMENTS

摘要

The water vapour operational data products fromrnMIPAS (V4.61) have been validated by comparisonrnwith independent satellite measurements from HALOErn(Version 19), SAGE II (Version 6.2), and POAM IIIrn(V2). Availability of MIPAS data were limited to thernvalidation reference data set from July 2002 tornDecember 2002. Between 100 hPa and 10 hPa (15-30rnkm) good agreement between MIPAS and the threernsatellite instruments to within the combined error of 15rn(POAM III) to 25(HALOE) has been found. Above 30rnkm (below 10 hPa) a positive bias of up to 20% withrnrespect to the other satellites has been observed. In thernlowermost stratosphere root-mean-squared scatter ofrnthe observed differences increases dramatically (abovern100 hPa with HALOE and POAM, and above 50 hParnwith SAGE II).