A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet
We are developing a climate-data record (CDR of daily "clear-sky" ice-surface temperature (IST) of the Greenland Ice Sheet, from 1982 to the present using Advanced Very High Resolution Radiometer (AVHRR) (1982 - present) and Moderate-Resolution Imaging Spectroradiometer (MODIS) data (2000...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20100033348 2023-05-15T15:02:20+02:00 A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet Stock, L. V. Shuman, C. A. Hall, D. K. Comiso, J. C. Riggs, G. A. Digirolamo, N. E. Unclassified, Unlimited, Publicly available December 16, 2009 application/pdf http://hdl.handle.net/2060/20100033348 unknown Document ID: 20100033348 http://hdl.handle.net/2060/20100033348 Copyright, Distribution as joint owner in the copyright CASI Meteorology and Climatology 2009 AGU Fall Meeting; 14?18 Dec. 2009; San Francisco, CA; United States 2009 ftnasantrs 2019-07-21T06:32:30Z We are developing a climate-data record (CDR of daily "clear-sky" ice-surface temperature (IST) of the Greenland Ice Sheet, from 1982 to the present using Advanced Very High Resolution Radiometer (AVHRR) (1982 - present) and Moderate-Resolution Imaging Spectroradiometer (MODIS) data (2000 - present) at a resolution of approximately 5 km. The CDR will be continued in the National Polar-orbiting Operational Environmental Satellite System Visible/Infrared Imager Radiometer Suite era. Two algorithms remain under consideration. One algorithm under consideration is based on the split-window technique used in the Polar Pathfinder dataset (Fowler et al., 2000 & 21007). Another algorithm under consideration, developed by Comiso (2006), uses a single channel of AVHRR data (channel 4) in conjunction with meteorological-station data to account for atmospheric effects and drift between AVHRR instruments. Known issues being addressed in the production of the CDR are: tune-series bias caused by cloud cover (surface temperatures can be different under clouds vs. clear areas) and cross-calibration in the overlap period between AVHRR instruments, and between AVHRR and MODIS instruments. Because of uncertainties, mainly due to clouds (Stroeve & Steffen, 1998; Wang and Key, 2005; Hall et al., 2008 and Koenig and Hall, submitted), time-series of satellite 1S'1" do not necessarily correspond to actual surface temperatures. The CDR will be validated by comparing results with automatic-,",eather station (AWS) data and with satellite-derived surface-temperature products. Regional "clear-sky" surface temperature increases in the Arctic, measured from AVHRR infrared data, range from 0.57+/-0.02 deg C (Wang and Key, 2005) to 0.72+/-0.10 deg C (Comiso, 2006) per decade since the early 1980s. Arctic warming has important implications for ice-sheet mass balance because much of the periphery of the Greenland Ice Sheet is already near 0 deg C during the melt season, and is thus vulnerable to rapid melting if temperatures continue to increase. References Other/Unknown Material Arctic Greenland Ice Sheet NASA Technical Reports Server (NTRS) Arctic Greenland Eather ENVELOPE(65.833,65.833,-70.483,-70.483) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Meteorology and Climatology |
spellingShingle |
Meteorology and Climatology Stock, L. V. Shuman, C. A. Hall, D. K. Comiso, J. C. Riggs, G. A. Digirolamo, N. E. A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet |
topic_facet |
Meteorology and Climatology |
description |
We are developing a climate-data record (CDR of daily "clear-sky" ice-surface temperature (IST) of the Greenland Ice Sheet, from 1982 to the present using Advanced Very High Resolution Radiometer (AVHRR) (1982 - present) and Moderate-Resolution Imaging Spectroradiometer (MODIS) data (2000 - present) at a resolution of approximately 5 km. The CDR will be continued in the National Polar-orbiting Operational Environmental Satellite System Visible/Infrared Imager Radiometer Suite era. Two algorithms remain under consideration. One algorithm under consideration is based on the split-window technique used in the Polar Pathfinder dataset (Fowler et al., 2000 & 21007). Another algorithm under consideration, developed by Comiso (2006), uses a single channel of AVHRR data (channel 4) in conjunction with meteorological-station data to account for atmospheric effects and drift between AVHRR instruments. Known issues being addressed in the production of the CDR are: tune-series bias caused by cloud cover (surface temperatures can be different under clouds vs. clear areas) and cross-calibration in the overlap period between AVHRR instruments, and between AVHRR and MODIS instruments. Because of uncertainties, mainly due to clouds (Stroeve & Steffen, 1998; Wang and Key, 2005; Hall et al., 2008 and Koenig and Hall, submitted), time-series of satellite 1S'1" do not necessarily correspond to actual surface temperatures. The CDR will be validated by comparing results with automatic-,",eather station (AWS) data and with satellite-derived surface-temperature products. Regional "clear-sky" surface temperature increases in the Arctic, measured from AVHRR infrared data, range from 0.57+/-0.02 deg C (Wang and Key, 2005) to 0.72+/-0.10 deg C (Comiso, 2006) per decade since the early 1980s. Arctic warming has important implications for ice-sheet mass balance because much of the periphery of the Greenland Ice Sheet is already near 0 deg C during the melt season, and is thus vulnerable to rapid melting if temperatures continue to increase. References |
format |
Other/Unknown Material |
author |
Stock, L. V. Shuman, C. A. Hall, D. K. Comiso, J. C. Riggs, G. A. Digirolamo, N. E. |
author_facet |
Stock, L. V. Shuman, C. A. Hall, D. K. Comiso, J. C. Riggs, G. A. Digirolamo, N. E. |
author_sort |
Stock, L. V. |
title |
A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet |
title_short |
A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet |
title_full |
A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet |
title_fullStr |
A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet |
title_full_unstemmed |
A Climate-Data Record of the "Clear-Sky" Surface Temperature of the Greenland Ice Sheet |
title_sort |
climate-data record of the "clear-sky" surface temperature of the greenland ice sheet |
publishDate |
2009 |
url |
http://hdl.handle.net/2060/20100033348 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(65.833,65.833,-70.483,-70.483) |
geographic |
Arctic Greenland Eather |
geographic_facet |
Arctic Greenland Eather |
genre |
Arctic Greenland Ice Sheet |
genre_facet |
Arctic Greenland Ice Sheet |
op_source |
CASI |
op_relation |
Document ID: 20100033348 http://hdl.handle.net/2060/20100033348 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766334301374251008 |