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| Titel |
Melt pond fraction and spectral sea ice albedo retrieval from MERIS data – Part 2: Case studies and trends of sea ice albedo and melt ponds in the Arctic for years 2002–2011 |
| VerfasserIn |
L. Istomina, G. Heygster, M. Huntemann, H. Marks, C. Melsheimer, E. Zege, A. Malinka, A. Prikhach, I. Katsev |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2015-08-12), S.1567-1578 |
| Datensatznummer |
250116834
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| Publikation (Nr.) |
 copernicus.org/tc-9-1567-2015.pdf |
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| Zusammenfassung |
| The spatial and temporal dynamics of melt ponds and sea ice albedo contain
information on the current state and the trend of the climate of the Arctic
region. This publication presents a study on melt pond fraction (MPF) and
sea ice albedo spatial and temporal dynamics obtained with the Melt Pond
Detection (MPD) retrieval scheme for the Medium Resolution Imaging
Spectrometer (MERIS) satellite data. This study compares sea ice albedo and
MPF to surface air temperature reanalysis data, compares MPF retrieved from
the Moderate Resolution Imaging Spectroradiometer (MODIS), and examines
albedo and MPF trends. Weekly averages of MPF for 2007 and 2011 showed
different MPF dynamics while summer sea ice minimum was similar for both
years. The gridded MPF and albedo products compare well to independent
reanalysis temperature data and show melt onset when the temperature gets
above zero; however MPD shows an offset at low MPFs of about 10 % most
probably due to unscreened high clouds. Weekly averaged trends show
pronounced dynamics of both, MPF and albedo: a negative MPF trend in the
East Siberian Sea and a positive MPF trend around the Queen Elizabeth Islands.
The negative MPF trend appears due to a change of the absolute MPF value in
its peak, whereas the positive MPF trend is created by the earlier melt
onset, with the peak MPF values unchanged. The MPF dynamics in the East
Siberian Sea could indicate a temporal change of ice type prevailing in the
region, as opposed to the Queen Elizabeth Islands, where MPF dynamics react
to an earlier seasonal onset of melt. |
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