Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13)
The stability of the Moderate Resolution Imaging Spectroradiometer (MODIS) ice-surface temperature (IST) product from Terra was investigated for use as a climate-quality data record. The availability of climate-quality air temperature data T(sub A) from a NOAA observatory at Greenland's Summit...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20150014247 2023-05-15T16:29:57+02:00 Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) Shuman, Christopher A. Hall, Dorothy K. Schnaubelt, Michael J. Mefford, Thomas K. DiGirolamo, Nicolo E. Unclassified, Unlimited, Publicly available September 2014 application/pdf http://hdl.handle.net/2060/20150014247 unknown Document ID: 20150014247 http://hdl.handle.net/2060/20150014247 Copyright, Distribution as joint owner in the copyright CASI Meteorology and Climatology GSFC-E-DAA-TN22000 Journal of Applied Meteorology and Climatology(ISSN 1558-8424 ); Volume 53; Issue 9; 2171–2180 2014 ftnasantrs 2016-03-12T23:55:02Z The stability of the Moderate Resolution Imaging Spectroradiometer (MODIS) ice-surface temperature (IST) product from Terra was investigated for use as a climate-quality data record. The availability of climate-quality air temperature data T(sub A) from a NOAA observatory at Greenland's Summit Station has enabled this high-temporal-resolution study of MODIS ISTs. During a 5-yr period (July 2008-August 2013), more than 2500 IST values were compared with plus or minus 3--min-average T(sub A) values from NOAA's primary 2-m temperature sensor. This enabled an expected small offset between air and ice-sheet surface temperatures (T(sub A) greater than IST) to be investigated over multiple annual cycles. The principal findings of this study show 1) that IST values are slightly colder than the T(sub A) values near freezing but that this offset increases as temperature decreases and 2) that there is a pattern in IST-T(sub A) differences as the solar zenith angle (SoZA) varies annually. This latter result largely explains the progressive offset from the in situ data at colder temperatures but also indicates that the MODIS cloudmask is less accurate approaching and during the polar night. The consistency of the results over each year in this study indicates that MODIS provides a platform for remotely deriving surface temperature data, with the resulting IST data being most compatible with in situ T(sub A) data when the sky is clear and the SoZA is less than approximately 85 degrees. The ongoing development of the IST dataset should benefit from improved cloud filtering as well as algorithm modifications to account for the progressive offset from T(sub A) at colder temperatures. Other/Unknown Material Greenland Ice Sheet polar night NASA Technical Reports Server (NTRS) Greenland |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Meteorology and Climatology |
spellingShingle |
Meteorology and Climatology Shuman, Christopher A. Hall, Dorothy K. Schnaubelt, Michael J. Mefford, Thomas K. DiGirolamo, Nicolo E. Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) |
topic_facet |
Meteorology and Climatology |
description |
The stability of the Moderate Resolution Imaging Spectroradiometer (MODIS) ice-surface temperature (IST) product from Terra was investigated for use as a climate-quality data record. The availability of climate-quality air temperature data T(sub A) from a NOAA observatory at Greenland's Summit Station has enabled this high-temporal-resolution study of MODIS ISTs. During a 5-yr period (July 2008-August 2013), more than 2500 IST values were compared with plus or minus 3--min-average T(sub A) values from NOAA's primary 2-m temperature sensor. This enabled an expected small offset between air and ice-sheet surface temperatures (T(sub A) greater than IST) to be investigated over multiple annual cycles. The principal findings of this study show 1) that IST values are slightly colder than the T(sub A) values near freezing but that this offset increases as temperature decreases and 2) that there is a pattern in IST-T(sub A) differences as the solar zenith angle (SoZA) varies annually. This latter result largely explains the progressive offset from the in situ data at colder temperatures but also indicates that the MODIS cloudmask is less accurate approaching and during the polar night. The consistency of the results over each year in this study indicates that MODIS provides a platform for remotely deriving surface temperature data, with the resulting IST data being most compatible with in situ T(sub A) data when the sky is clear and the SoZA is less than approximately 85 degrees. The ongoing development of the IST dataset should benefit from improved cloud filtering as well as algorithm modifications to account for the progressive offset from T(sub A) at colder temperatures. |
format |
Other/Unknown Material |
author |
Shuman, Christopher A. Hall, Dorothy K. Schnaubelt, Michael J. Mefford, Thomas K. DiGirolamo, Nicolo E. |
author_facet |
Shuman, Christopher A. Hall, Dorothy K. Schnaubelt, Michael J. Mefford, Thomas K. DiGirolamo, Nicolo E. |
author_sort |
Shuman, Christopher A. |
title |
Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) |
title_short |
Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) |
title_full |
Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) |
title_fullStr |
Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) |
title_full_unstemmed |
Comparison of Near-Surface Air Temperatures and MODIS Ice-Surface Temperatures at Summit, Greenland (2008-13) |
title_sort |
comparison of near-surface air temperatures and modis ice-surface temperatures at summit, greenland (2008-13) |
publishDate |
2014 |
url |
http://hdl.handle.net/2060/20150014247 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet polar night |
genre_facet |
Greenland Ice Sheet polar night |
op_source |
CASI |
op_relation |
Document ID: 20150014247 http://hdl.handle.net/2060/20150014247 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766019654931709952 |