Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only
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 Temperatur...
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Copernicus Publications
2015-10-01
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Series: | Atmospheric Measurement Techniques |
Online Access: | http://www.atmos-meas-tech.net/8/4025/2015/amt-8-4025-2015.pdf |
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author | H.-J. Kang J.-M. Yoo M.-J. Jeong Y.-I. Won |
author_facet | H.-J. Kang J.-M. Yoo M.-J. Jeong Y.-I. Won |
author_sort | H.-J. Kang |
collection | DOAJ |
description | 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<sup>−1</sup>) 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. |
first_indexed | 2024-04-12T23:09:53Z |
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id | doaj.art-e42081539f6347e39f32072680f15a49 |
institution | Directory Open Access Journal |
issn | 1867-1381 1867-8548 |
language | English |
last_indexed | 2024-04-12T23:09:53Z |
publishDate | 2015-10-01 |
publisher | Copernicus Publications |
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series | Atmospheric Measurement Techniques |
spelling | doaj.art-e42081539f6347e39f32072680f15a492022-12-22T03:12:50ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482015-10-018104025404110.5194/amt-8-4025-2015Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS onlyH.-J. Kang0J.-M. Yoo1M.-J. Jeong2Y.-I. Won3Department of Atmospheric Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of KoreaDepartment of Science Education, Ewha Womans University, Seoul 120-750, Republic of KoreaDepartment of Atmospheric and Environmental Sciences, Gangneung-Wonju National University, Gangneung 210-702, Republic of KoreaWyle ST&E, NASA/GSFC, Maryland, USAUncertainties 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<sup>−1</sup>) 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.http://www.atmos-meas-tech.net/8/4025/2015/amt-8-4025-2015.pdf |
spellingShingle | H.-J. Kang J.-M. Yoo M.-J. Jeong Y.-I. Won Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only Atmospheric Measurement Techniques |
title | Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only |
title_full | Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only |
title_fullStr | Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only |
title_full_unstemmed | Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only |
title_short | Uncertainties of satellite-derived surface skin temperatures in the polar oceans: MODIS, AIRS/AMSU, and AIRS only |
title_sort | uncertainties of satellite derived surface skin temperatures in the polar oceans modis airs amsu and airs only |
url | http://www.atmos-meas-tech.net/8/4025/2015/amt-8-4025-2015.pdf |
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