Arctic ice surface temperature retrieval from AVHRR thermal channels
The relationship between AVHRR thermal radiances and the surface (skin) temperature of Arctic snow-covered sea ice is examined through forward calculations of the radiative transfer equation, providing an ice/snow surface temperature retrieval algorithm for the central Arctic Basin. Temperature and...
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1992
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ftnasantrs:oai:casi.ntrs.nasa.gov:19920053482 2023-05-15T14:29:13+02:00 Arctic ice surface temperature retrieval from AVHRR thermal channels Key, J. Haeflinger, M. Unclassified, Unlimited, Publicly available Apr 20, 1992 http://ntrs.nasa.gov/search.jsp?R=19920053482 unknown http://ntrs.nasa.gov/search.jsp?R=19920053482 Accession ID: 92A36106 Copyright Other Sources 48 Journal of Geophysical Research; 97; D5, A; 5885-589 1992 ftnasantrs 2012-02-15T19:33:15Z The relationship between AVHRR thermal radiances and the surface (skin) temperature of Arctic snow-covered sea ice is examined through forward calculations of the radiative transfer equation, providing an ice/snow surface temperature retrieval algorithm for the central Arctic Basin. Temperature and humidity profiles with cloud observations collected on an ice island during 1986-1987 are used. Coefficients that correct for atmospheric attenuation are given for three Arctic clear sky 'seasons', as defined through statistical analysis of the daily profiles, for the NOAA 7, 9, and 11 satellites. Modeled directional snow emissivities, different in the two split-window (11 and 12 micron) channels, are used. While the sensor scan angle is included explicitly in the correction equation, its effect in the dry Arctic atmosphere is small, generally less than 0.1 K. Using the split-window channels and scan angle, the rms error in the estimated ice surface temperature is less than 0.1 K in all seasons. Inclusion channel 3(3.7 microns) during the winter decreases the rms error by less than 0.003 Other/Unknown Material Arctic Basin Arctic Sea ice NASA Technical Reports Server (NTRS) Arctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
48 |
spellingShingle |
48 Key, J. Haeflinger, M. Arctic ice surface temperature retrieval from AVHRR thermal channels |
topic_facet |
48 |
description |
The relationship between AVHRR thermal radiances and the surface (skin) temperature of Arctic snow-covered sea ice is examined through forward calculations of the radiative transfer equation, providing an ice/snow surface temperature retrieval algorithm for the central Arctic Basin. Temperature and humidity profiles with cloud observations collected on an ice island during 1986-1987 are used. Coefficients that correct for atmospheric attenuation are given for three Arctic clear sky 'seasons', as defined through statistical analysis of the daily profiles, for the NOAA 7, 9, and 11 satellites. Modeled directional snow emissivities, different in the two split-window (11 and 12 micron) channels, are used. While the sensor scan angle is included explicitly in the correction equation, its effect in the dry Arctic atmosphere is small, generally less than 0.1 K. Using the split-window channels and scan angle, the rms error in the estimated ice surface temperature is less than 0.1 K in all seasons. Inclusion channel 3(3.7 microns) during the winter decreases the rms error by less than 0.003 |
format |
Other/Unknown Material |
author |
Key, J. Haeflinger, M. |
author_facet |
Key, J. Haeflinger, M. |
author_sort |
Key, J. |
title |
Arctic ice surface temperature retrieval from AVHRR thermal channels |
title_short |
Arctic ice surface temperature retrieval from AVHRR thermal channels |
title_full |
Arctic ice surface temperature retrieval from AVHRR thermal channels |
title_fullStr |
Arctic ice surface temperature retrieval from AVHRR thermal channels |
title_full_unstemmed |
Arctic ice surface temperature retrieval from AVHRR thermal channels |
title_sort |
arctic ice surface temperature retrieval from avhrr thermal channels |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19920053482 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Basin Arctic Sea ice |
genre_facet |
Arctic Basin Arctic Sea ice |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19920053482 Accession ID: 92A36106 |
op_rights |
Copyright |
_version_ |
1766303284018020352 |