Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int
Microwave measurements have been used in various studies to detect melt based on their sensitivity to liquid water present in snow. To contrast different melt detection methods used with different sensors, six different melt detection method/sensor combinations are compared using data for the summer...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.391.8593 2023-05-15T16:29:12+02:00 Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int Ivan S. Ashcraft David G. Long The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.8593 http://www.mers.byu.edu/long/papers/IJRS2006_Ashcraft.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.8593 http://www.mers.byu.edu/long/papers/IJRS2006_Ashcraft.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.mers.byu.edu/long/papers/IJRS2006_Ashcraft.pdf text 2006 ftciteseerx 2016-01-08T02:17:33Z Microwave measurements have been used in various studies to detect melt based on their sensitivity to liquid water present in snow. To contrast different melt detection methods used with different sensors, six different melt detection method/sensor combinations are compared using data for the summer of 2000. The sensors include the Special Spectral Microwave Imager (SSM/I), SeaWinds on QuikSCAT (QSCAT), and the European Remote Sensing (ERS) Advanced Microwave Instrument (AMI) in scatterometer mode. Existing melt detection methods are compared with melt detection based on a simple physical model. The model relates the moisture content and depth of a surface melt layer of wet snow to a single channel melt detection threshold. The model can be applied to both active and passive sensors and improves the consistency between brightness temperature (Tb) and normalized radar backscatter (su) based detection of melt. Model-based melt estimates from different sensors are highly correlated and do not exhibit the unnatural phenomenon observed with previous methods. Relative merits and limitations of the various methods are discussed. 1. Text Greenland Unknown Greenland |
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description |
Microwave measurements have been used in various studies to detect melt based on their sensitivity to liquid water present in snow. To contrast different melt detection methods used with different sensors, six different melt detection method/sensor combinations are compared using data for the summer of 2000. The sensors include the Special Spectral Microwave Imager (SSM/I), SeaWinds on QuikSCAT (QSCAT), and the European Remote Sensing (ERS) Advanced Microwave Instrument (AMI) in scatterometer mode. Existing melt detection methods are compared with melt detection based on a simple physical model. The model relates the moisture content and depth of a surface melt layer of wet snow to a single channel melt detection threshold. The model can be applied to both active and passive sensors and improves the consistency between brightness temperature (Tb) and normalized radar backscatter (su) based detection of melt. Model-based melt estimates from different sensors are highly correlated and do not exhibit the unnatural phenomenon observed with previous methods. Relative merits and limitations of the various methods are discussed. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Ivan S. Ashcraft David G. Long |
spellingShingle |
Ivan S. Ashcraft David G. Long Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int |
author_facet |
Ivan S. Ashcraft David G. Long |
author_sort |
Ivan S. Ashcraft |
title |
Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int |
title_short |
Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int |
title_full |
Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int |
title_fullStr |
Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int |
title_full_unstemmed |
Comparison of Methods for melt detection over Greenland using active and passive microwave measurements,” to appear, Int |
title_sort |
comparison of methods for melt detection over greenland using active and passive microwave measurements,” to appear, int |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.8593 http://www.mers.byu.edu/long/papers/IJRS2006_Ashcraft.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
http://www.mers.byu.edu/long/papers/IJRS2006_Ashcraft.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.8593 http://www.mers.byu.edu/long/papers/IJRS2006_Ashcraft.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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