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| Titel |
Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only |
| VerfasserIn |
H.-J. Kang, J.-M. Yoo, M.-J. Jeong, Y.-I. Won |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 10 ; Nr. 8, no. 10 (2015-10-02), S.4025-4041 |
| Datensatznummer |
250116622
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| Publikation (Nr.) |
 copernicus.org/amt-8-4025-2015.pdf |
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| Zusammenfassung |
| Uncertainties in the satellite-derived surface skin temperature (SST) data
in the polar oceans during two periods (16–24 April and 15–23 September)
2003–2014 were investigated and the three data sets were intercompared as
follows: MODerate Resolution Imaging Spectroradiometer Ice Surface
Temperature (MODIS IST), the SST of the Atmospheric Infrared
Sounder/Advanced Microwave Sounding Unit-A (AIRS/AMSU), and AIRS only. The AIRS
only algorithm was developed in preparation for the degradation of the
AMSU-A. MODIS IST was systematically warmer up to 1.65 K at the sea ice
boundary and colder down to −2.04 K in the polar sea ice regions of both the
Arctic and Antarctic than that of the AIRS/AMSU. This difference in the
results could have been caused by the surface classification method. The
spatial correlation coefficient of the AIRS only to the AIRS/AMSU
(0.992–0.999) method was greater than that of the MODIS IST to the AIRS/AMSU
(0.968–0.994). The SST of the AIRS only compared to that of the AIRS/AMSU
had a bias of 0.168 K with a RMSE of 0.590 K over the Northern Hemisphere
high latitudes and a bias of −0.109 K with a RMSE of 0.852 K over the
Southern Hemisphere high latitudes. There was a systematic disagreement
between the AIRS retrievals at the boundary of the sea ice, because the AIRS
only algorithm utilized a less accurate GCM forecast over the
seasonally varying frozen oceans than the microwave data. The three data sets
(MODIS, AIRS/AMSU and AIRS only) showed significant warming rates
(2.3 ± 1.7 ~ 2.8 ± 1.9 K decade−1) in the northern
high regions (70–80° N) as expected from the ice-albedo feedback. The
systematic temperature disagreement associated with surface type
classification had an impact on the resulting temperature trends. |
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