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Differentiating between first-year and multiyear sea ice in the Arctic using microwave-retrieved ice emissivities

Cited 18 time in wos
Cited 20 time in scopus
Title
Differentiating between first-year and multiyear sea ice in the Arctic using microwave-retrieved ice emissivities
Other Titles
마이크로파로 분석된 북극 해빙의 다년빙과 1년빙의 구분 방법
Authors
Lee, Sang-Moo
Sohn, Byung-Ju
Kim, Seong-Joong
Subject
Meteorology & Atmospheric Sciences
Keywords
AMSR-E DATAPASSIVE MICROWAVESNOW DEPTHTEMPERATUREVARIABILITYALGORITHMSSURFACESUMMERWINTERCOVER
Issue Date
2017-05-27
Citation
Lee, Sang-Moo, Sohn, Byung-Ju, Kim, Seong-Joong. 2017. "Differentiating between first-year and multiyear sea ice in the Arctic using microwave-retrieved ice emissivities". JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 122(10): 5097-5112.
Abstract
Polarized emissivities of the sea ice over the Arctic were retrieved at Advanced Microwave Scanning RadiometerEOS 10.65, 18.7, 23.8, and 36.5 GHz channel frequencies. Results indicate that retrieved emissivities are consistent with other emissivity estimates. However, errors in the retrieved emissivity for multiyear sea ice at 23.8 and 36.5 GHz can be large up to 8% and 20%, respectively, because of ignoring the freeboard ice scattering and the use of the same emission layer as in 6.925 GHz. It is shown that the emissivity slope for first-year ice between 10.65 and 18.7 GHz is opposite to that for multiyear sea ice, enabling a distinction between first-year ice and multiyear ice. Using these differences in spectral features with ice types, an emissivity difference (vertically polarized emissivity difference between 10.65 and 18.7 GHz) was devised to differentiate between first-year sea ice and multiyear sea ice. A comparison with the ice status information obtained from Cold Regions Research and Engineering Laboratory buoy measurements demonstrates that the method can separate first-year ice from multiyear ice, implying that this technique enables us to obtain instantaneous and pixel-level ice-type information from space-based passive microwave measurements.
URI
https://repository.kopri.re.kr/handle/201206/13020
DOI
http://dx.doi.org/10.1002/2016JD026275
Type
Article
Indexed
SCI
Appears in Collections  
2015 Polar Academic Program (PD15010)
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