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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/amt-2017-219
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
03 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
Retrieval of Total Water Vapour in the Arctic Using Microwave Humidity Sounders
Raul Cristian Scarlat, Christian Melsheimer, and Georg Heygster Institute of Environmental Physics, University of Bremen, Germany
Abstract. Quantitative retrievals of atmospheric water vapour in the Arctic are faced with numerous challenges because of the particular climate characteristics of this area. Here, we attempt to build upon the work of Melsheimer and Heygster (2008) to retrieve total atmospheric water vapour (TWV) in the Arctic from satellite microwave radiometers. While the above mentioned algorithm deals primarily with the ice-covered central Arctic, with this work we are aiming to extend the coverage to low ice cover and ice-free areas. By using modeled values for the microwave emissivity of the ice-free sea surface, we develop two sub-algorithms using different sets of channels that deal solely with open ocean areas. This approach allows us to apply the algorithm to regions where previously no data were available and ensures a more consistent physical analysis of the satellite measurements by taking into account the contribution of the surface emissivity to the measured signal.

Citation: Scarlat, R. C., Melsheimer, C., and Heygster, G.: Retrieval of Total Water Vapour in the Arctic Using Microwave Humidity Sounders, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-219, in review, 2017.
Raul Cristian Scarlat et al.
Raul Cristian Scarlat et al.
Raul Cristian Scarlat et al.

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Short summary
An obstacle in achieving reliable satellite measurements of atmospheric water vapour in the Arctic is the presence of sea ice. Here we have extended on a previous method that achieves consistent atmospheric measurements over sea ice covered regions. The main focus was to adapt the method for better coverage in low ice cover and ice-free areas by accounting for the signal from the open ocean surface. This approach extends the coverage from the central Arctic to the entire Arctic region.
An obstacle in achieving reliable satellite measurements of atmospheric water vapour in the...
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