Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers
Abstract—Ku-band dual-polarization radar backscatter measurements from the SeaWinds-on-QuikSCAT scatterometer are used to determine periods of surface freeze and melt in the Antarctic ice shelves. The normalized horizontal-polarization radar backscatter (σ o) and backscatter polarization ratio are u...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.391.6079 2023-05-15T13:48:10+02:00 Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers Lukas B. Kunz David G. Long Senior Member The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.6079 http://www.mers.byu.edu/long/papers/TGARS2006SepKunz.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.6079 http://www.mers.byu.edu/long/papers/TGARS2006SepKunz.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.mers.byu.edu/long/papers/TGARS2006SepKunz.pdf refreeze SeaWinds Special Sensor Microwave/Imager (SSM/I text ftciteseerx 2016-01-08T02:16:54Z Abstract—Ku-band dual-polarization radar backscatter measurements from the SeaWinds-on-QuikSCAT scatterometer are used to determine periods of surface freeze and melt in the Antarctic ice shelves. The normalized horizontal-polarization radar backscatter (σ o) and backscatter polarization ratio are used in maximum-likelihood estimation of the ice state. This method is used to infer the daily ice-surface conditions for 25 study locations located on the Ronne, Ross, Larsen, Amery, Shackleton, and other ice shelves. The temporal and spatial variations of the radar response are observed for various neighborhood sizes surrounding each given location during the study period. Criteria for determining the dates of melt onset and freeze-up for each Austral summer are presented. Validation of the ice-state and melt-onset date estimates is performed by analyzing the corresponding brightness temperature (Tb) measurements from Special Sensor Microwave/Imager (SSM/I) radiometers. QuikSCAT σ o measurements from 1999 to 2003 are analyzed and found to be effective in determining periods of melt in Antarctic ice sheets at high temporal and spatial resolutions. These estimates can be used in studies of the climatic effects of the seasonal and interannual melting of the Antarctic ice sheets. Index Terms—Antarctic, ice, ice shelves, melt onset, QuikSCAT Text Antarc* Antarctic Ice Shelves Unknown Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Antarctic Austral Shackleton The Antarctic |
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Open Polar |
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ftciteseerx |
language |
English |
topic |
refreeze SeaWinds Special Sensor Microwave/Imager (SSM/I |
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refreeze SeaWinds Special Sensor Microwave/Imager (SSM/I Lukas B. Kunz David G. Long Senior Member Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers |
topic_facet |
refreeze SeaWinds Special Sensor Microwave/Imager (SSM/I |
description |
Abstract—Ku-band dual-polarization radar backscatter measurements from the SeaWinds-on-QuikSCAT scatterometer are used to determine periods of surface freeze and melt in the Antarctic ice shelves. The normalized horizontal-polarization radar backscatter (σ o) and backscatter polarization ratio are used in maximum-likelihood estimation of the ice state. This method is used to infer the daily ice-surface conditions for 25 study locations located on the Ronne, Ross, Larsen, Amery, Shackleton, and other ice shelves. The temporal and spatial variations of the radar response are observed for various neighborhood sizes surrounding each given location during the study period. Criteria for determining the dates of melt onset and freeze-up for each Austral summer are presented. Validation of the ice-state and melt-onset date estimates is performed by analyzing the corresponding brightness temperature (Tb) measurements from Special Sensor Microwave/Imager (SSM/I) radiometers. QuikSCAT σ o measurements from 1999 to 2003 are analyzed and found to be effective in determining periods of melt in Antarctic ice sheets at high temporal and spatial resolutions. These estimates can be used in studies of the climatic effects of the seasonal and interannual melting of the Antarctic ice sheets. Index Terms—Antarctic, ice, ice shelves, melt onset, QuikSCAT |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Lukas B. Kunz David G. Long Senior Member |
author_facet |
Lukas B. Kunz David G. Long Senior Member |
author_sort |
Lukas B. Kunz |
title |
Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers |
title_short |
Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers |
title_full |
Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers |
title_fullStr |
Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers |
title_full_unstemmed |
Melt Detection in Antarctic Ice Shelves Using Scatterometers and Microwave Radiometers |
title_sort |
melt detection in antarctic ice shelves using scatterometers and microwave radiometers |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.6079 http://www.mers.byu.edu/long/papers/TGARS2006SepKunz.pdf |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) |
geographic |
Amery Antarctic Austral Shackleton The Antarctic |
geographic_facet |
Amery Antarctic Austral Shackleton The Antarctic |
genre |
Antarc* Antarctic Ice Shelves |
genre_facet |
Antarc* Antarctic Ice Shelves |
op_source |
http://www.mers.byu.edu/long/papers/TGARS2006SepKunz.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.6079 http://www.mers.byu.edu/long/papers/TGARS2006SepKunz.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766248819256721408 |