Validation of total water vapor retrieval with an airborne millimeter wave radiometer over Arctic sea ice

2001 were used to validate a total water vapor (TWV) algorithm. This is a modified version of an algorithm developed by Miao et al. [2001] using SSM/T2 data in the Antarctic. Data from a passive microwave radiometer with channels at 157, 183 � 7, 183 � 3, and 183 � 1 GHz have been used. Dropsondes w...

Full description

Bibliographic Details
Main Authors: Nathalie Selbach, Tim J. Hewison, Georg Heygster, Jungang Miao, Andrew J. Mcgrath, Jonathan P. Taylor
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
water vapor
microwave radiometry
remote sensing
polar atmosphere
Antarctic
Arctic
The Antarctic
Antarc*
Sea ice
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.182.1647
http://www.aao.gov.au/local/www/ajm/radiosci.pdf
Description
Summary:2001 were used to validate a total water vapor (TWV) algorithm. This is a modified version of an algorithm developed by Miao et al. [2001] using SSM/T2 data in the Antarctic. Data from a passive microwave radiometer with channels at 157, 183 � 7, 183 � 3, and 183 � 1 GHz have been used. Dropsondes were launched from the aircraft during the flights to provide ground truth for the validation of the algorithm. The surface emissivity is assumed to be the same for the frequencies used. In general, there is a good agreement with TWV derived from dropsondes using the 183 GHz data only. This assumption leads to systematic errors in the estimation of TWV if the 157 GHz data are used in combination with measurements at 183 GHz. The high surface emissivity in regions of new ice is shown to lead to errors as a result of the strong influence of the surface. The difference in emissivity between 157 GHz and 183 GHz is larger over open water than over the sea ice, and therefore the error in TWV using the lower frequencies

Similar Items