Arctic Clouds Infrared Imaging Field Campaign Report
The Infrared Cloud Imager (ICI), a passive thermal imaging system, was deployed at the North Slope of Alaska site in Barrow, Alaska, from July 2012 to July 2014 for measuring spatial-temporal cloud statistics. Thermal imaging of the sky from the ground provides high radiometric contrast during night...
Main Author: | |
---|---|
Language: | unknown |
Published: |
2016
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1248496 https://www.osti.gov/biblio/1248496 https://doi.org/10.2172/1248496 |
id |
ftosti:oai:osti.gov:1248496 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1248496 2023-07-30T04:01:09+02:00 Arctic Clouds Infrared Imaging Field Campaign Report Shaw, J. A. 2016-05-12 application/pdf http://www.osti.gov/servlets/purl/1248496 https://www.osti.gov/biblio/1248496 https://doi.org/10.2172/1248496 unknown http://www.osti.gov/servlets/purl/1248496 https://www.osti.gov/biblio/1248496 https://doi.org/10.2172/1248496 doi:10.2172/1248496 54 ENVIRONMENTAL SCIENCES 2016 ftosti https://doi.org/10.2172/1248496 2023-07-11T09:05:54Z The Infrared Cloud Imager (ICI), a passive thermal imaging system, was deployed at the North Slope of Alaska site in Barrow, Alaska, from July 2012 to July 2014 for measuring spatial-temporal cloud statistics. Thermal imaging of the sky from the ground provides high radiometric contrast during night and polar winter when visible sensors and downward-viewing thermal sensors experience low contrast. In addition to demonstrating successful operation in the Arctic for an extended period and providing data for Arctic cloud studies, a primary objective of this deployment was to validate novel instrument calibration algorithms that will allow more compact ICI instruments to be deployed without the added expense, weight, size, and operational difficulty of a large-aperture onboard blackbody calibration source. This objective was successfully completed with a comparison of the two-year data set calibrated with and without the onboard blackbody. The two different calibration methods produced daily-average cloud amount data sets with correlation coefficient = 0.99, mean difference = 0.0029 (i.e., 0.29% cloudiness), and a difference standard deviation = 0.054. Finally, the ICI instrument generally detected more thin clouds than reported by other ARM cloud products available as of late 2015. Other/Unknown Material Arctic Barrow north slope Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Shaw, J. A. Arctic Clouds Infrared Imaging Field Campaign Report |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
The Infrared Cloud Imager (ICI), a passive thermal imaging system, was deployed at the North Slope of Alaska site in Barrow, Alaska, from July 2012 to July 2014 for measuring spatial-temporal cloud statistics. Thermal imaging of the sky from the ground provides high radiometric contrast during night and polar winter when visible sensors and downward-viewing thermal sensors experience low contrast. In addition to demonstrating successful operation in the Arctic for an extended period and providing data for Arctic cloud studies, a primary objective of this deployment was to validate novel instrument calibration algorithms that will allow more compact ICI instruments to be deployed without the added expense, weight, size, and operational difficulty of a large-aperture onboard blackbody calibration source. This objective was successfully completed with a comparison of the two-year data set calibrated with and without the onboard blackbody. The two different calibration methods produced daily-average cloud amount data sets with correlation coefficient = 0.99, mean difference = 0.0029 (i.e., 0.29% cloudiness), and a difference standard deviation = 0.054. Finally, the ICI instrument generally detected more thin clouds than reported by other ARM cloud products available as of late 2015. |
author |
Shaw, J. A. |
author_facet |
Shaw, J. A. |
author_sort |
Shaw, J. A. |
title |
Arctic Clouds Infrared Imaging Field Campaign Report |
title_short |
Arctic Clouds Infrared Imaging Field Campaign Report |
title_full |
Arctic Clouds Infrared Imaging Field Campaign Report |
title_fullStr |
Arctic Clouds Infrared Imaging Field Campaign Report |
title_full_unstemmed |
Arctic Clouds Infrared Imaging Field Campaign Report |
title_sort |
arctic clouds infrared imaging field campaign report |
publishDate |
2016 |
url |
http://www.osti.gov/servlets/purl/1248496 https://www.osti.gov/biblio/1248496 https://doi.org/10.2172/1248496 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow north slope Alaska |
genre_facet |
Arctic Barrow north slope Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1248496 https://www.osti.gov/biblio/1248496 https://doi.org/10.2172/1248496 doi:10.2172/1248496 |
op_doi |
https://doi.org/10.2172/1248496 |
_version_ |
1772811912314093568 |