Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis
Following the development and availability of Aquarius weekly polar-gridded products, this study presents the spatial and temporal radiometer and scatterometer observations at L band (frequency ~1.4 GHz) over the cryosphere including the Greenland and Antarctic ice sheets, sea ice in both hemisphere...
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ftdoajarticles:oai:doaj.org/article:a95c2fa49f1d45d6bd507e3fc74ee425 2023-05-15T14:04:23+02:00 Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis L. Brucker E. P. Dinnat L. S. Koenig 2014-05-01T00:00:00Z https://doi.org/10.5194/tc-8-915-2014 https://doaj.org/article/a95c2fa49f1d45d6bd507e3fc74ee425 EN eng Copernicus Publications http://www.the-cryosphere.net/8/915/2014/tc-8-915-2014.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-8-915-2014 https://doaj.org/article/a95c2fa49f1d45d6bd507e3fc74ee425 The Cryosphere, Vol 8, Iss 3, Pp 915-930 (2014) Environmental sciences GE1-350 Geology QE1-996.5 article 2014 ftdoajarticles https://doi.org/10.5194/tc-8-915-2014 2022-12-31T02:27:34Z Following the development and availability of Aquarius weekly polar-gridded products, this study presents the spatial and temporal radiometer and scatterometer observations at L band (frequency ~1.4 GHz) over the cryosphere including the Greenland and Antarctic ice sheets, sea ice in both hemispheres, and over sub-Arctic land for monitoring the soil freeze/thaw state. We provide multiple examples of scientific applications for the L-band data over the cryosphere. For example, we show that over the Greenland Ice Sheet, the unusual 2012 melt event lead to an L-band brightness temperature (TB) sustained decrease of ~5 K at horizontal polarization. Over the Antarctic ice sheet, normalized radar cross section (NRCS) observations recorded during ascending and descending orbits are significantly different, highlighting the anisotropy of the ice cover. Over sub-Arctic land, both passive and active observations show distinct values depending on the soil physical state (freeze/thaw). Aquarius sea surface salinity (SSS) retrievals in the polar waters are also presented. SSS variations could serve as an indicator of fresh water input to the ocean from the cryosphere, however the presence of sea ice often contaminates the SSS retrievals, hindering the analysis. The weekly grided Aquarius L-band products used are distributed by the US Snow and Ice Data Center at http://nsidc.org/data/aquarius/index.html , and show potential for cryospheric studies. Article in Journal/Newspaper Antarc* Antarctic Arctic Greenland Ice Sheet Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Antarctic The Antarctic Greenland The Cryosphere 8 3 915 930 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 L. Brucker E. P. Dinnat L. S. Koenig Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Following the development and availability of Aquarius weekly polar-gridded products, this study presents the spatial and temporal radiometer and scatterometer observations at L band (frequency ~1.4 GHz) over the cryosphere including the Greenland and Antarctic ice sheets, sea ice in both hemispheres, and over sub-Arctic land for monitoring the soil freeze/thaw state. We provide multiple examples of scientific applications for the L-band data over the cryosphere. For example, we show that over the Greenland Ice Sheet, the unusual 2012 melt event lead to an L-band brightness temperature (TB) sustained decrease of ~5 K at horizontal polarization. Over the Antarctic ice sheet, normalized radar cross section (NRCS) observations recorded during ascending and descending orbits are significantly different, highlighting the anisotropy of the ice cover. Over sub-Arctic land, both passive and active observations show distinct values depending on the soil physical state (freeze/thaw). Aquarius sea surface salinity (SSS) retrievals in the polar waters are also presented. SSS variations could serve as an indicator of fresh water input to the ocean from the cryosphere, however the presence of sea ice often contaminates the SSS retrievals, hindering the analysis. The weekly grided Aquarius L-band products used are distributed by the US Snow and Ice Data Center at http://nsidc.org/data/aquarius/index.html , and show potential for cryospheric studies. |
format |
Article in Journal/Newspaper |
author |
L. Brucker E. P. Dinnat L. S. Koenig |
author_facet |
L. Brucker E. P. Dinnat L. S. Koenig |
author_sort |
L. Brucker |
title |
Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis |
title_short |
Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis |
title_full |
Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis |
title_fullStr |
Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis |
title_full_unstemmed |
Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 2: Initial product analysis |
title_sort |
weekly gridded aquarius l-band radiometer/scatterometer observations and salinity retrievals over the polar regions – part 2: initial product analysis |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-915-2014 https://doaj.org/article/a95c2fa49f1d45d6bd507e3fc74ee425 |
geographic |
Arctic Antarctic The Antarctic Greenland |
geographic_facet |
Arctic Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Arctic Greenland Ice Sheet Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctic Arctic Greenland Ice Sheet Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 8, Iss 3, Pp 915-930 (2014) |
op_relation |
http://www.the-cryosphere.net/8/915/2014/tc-8-915-2014.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-8-915-2014 https://doaj.org/article/a95c2fa49f1d45d6bd507e3fc74ee425 |
op_doi |
https://doi.org/10.5194/tc-8-915-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
3 |
container_start_page |
915 |
op_container_end_page |
930 |
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1766275426408202240 |