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| Titel |
Weekly gridded Aquarius L-band radiometer/scatterometer observations and salinity retrievals over the polar regions – Part 1: Product description |
| VerfasserIn |
L. Brucker, E. P. Dinnat, L. S. Koenig |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 8, no. 3 ; Nr. 8, no. 3 (2014-05-16), S.905-913 |
| Datensatznummer |
250116155
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| Publikation (Nr.) |
 copernicus.org/tc-8-905-2014.pdf |
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| Zusammenfassung |
| Passive and active observations at L band (frequency ~1.4 GHz) from the
Aquarius/SAC-D mission offer new capabilities to study the polar regions. Due
to the lack of polar-gridded products, however, applications over the
cryosphere have been limited. We present three weekly polar-gridded products
of Aquarius data to improve our understanding of L-band observations of ice
sheets, sea ice, permafrost, and the polar oceans. Additionally, these
products intend to facilitate access to L-band data, and can be used to
assist in algorithm developments. Aquarius data at latitudes higher than
50° are averaged and gridded into weekly products of brightness
temperature (TB), normalized radar cross section (NRCS), and sea surface
salinity (SSS). Each grid cell also contains sea ice fraction, the standard
deviation of TB, NRCS, and SSS, and the number of footprint observations
collected during the seven-day cycle. The largest 3 dB footprint dimensions
are 97 km × 156 km and 74 km × 122 km (along × across
track) for the radiometers and scatterometer, respectively. The data is
gridded to the Equal-Area Scalable Earth version 2.0 (EASE2.0) grid, with a
grid cell resolution of 36 km. The data sets start in August 2011, with the
first Aquarius observations and will be updated on a monthly basis following
the release schedule of the Aquarius Level 2 data sets. The weekly gridded
products are distributed by the US National Snow and Ice Data Center at http://nsidc.org/data/aquarius/index.html . |
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