Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE
A shortwave spectroradiometer was deployed on the West Antarctic Ice Sheet (WAIS) as part of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) program ARM West Antarctic Radiation Experiment (AWARE). This instrument recorded 1-min averages of downwelling hemispheric spectral irra...
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Online Access: | http://www.osti.gov/servlets/purl/1484684 https://www.osti.gov/biblio/1484684 https://doi.org/10.1029/2018JD028347 |
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ftosti:oai:osti.gov:1484684 2023-07-30T03:59:18+02:00 Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE Wilson, A. Scott, R. C. Cadeddu, M. P. Ghate, V. Lubin, D. 2022-01-03 application/pdf http://www.osti.gov/servlets/purl/1484684 https://www.osti.gov/biblio/1484684 https://doi.org/10.1029/2018JD028347 unknown http://www.osti.gov/servlets/purl/1484684 https://www.osti.gov/biblio/1484684 https://doi.org/10.1029/2018JD028347 doi:10.1029/2018JD028347 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1029/2018JD028347 2023-07-11T09:30:19Z A shortwave spectroradiometer was deployed on the West Antarctic Ice Sheet (WAIS) as part of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) program ARM West Antarctic Radiation Experiment (AWARE). This instrument recorded 1-min averages of downwelling hemispheric spectral irradiance covering the wavelength range 350–2,200 nm with spectral resolution 3 and 10 nm for wavelengths shorter and longer than 1,000 nm, respectively. Using simultaneous micropulse lidar data to identify the thermodynamic phase of stratiform clouds, a radiative transfer algorithm is used here to retrieve optical depth and effective droplet (or particle) size for single-phase liquid water and ice water clouds. The AWARE campaign on the WAIS first sampled typical climatological conditions between 7 December 2015 and 9 January 2016 and then a much warmer air mass with more moisture associated with a surface melt event between 10 and 17 January 2016. Before the melt event most liquid cloud effective droplet radii were consistent with pristine polar maritime clouds (mode radius 13.5 μm) but showed a second local maximum in the distribution (at 8 μm) consistent with colder, moisture-limited conditions. Most ice clouds sampled occurred before the melt event (mode optical depth 4 and effective particle size 19 μm). During the melt event liquid water cloud optical depth nearly doubled (mode value increasing from 8 to 14). AWARE therefore sampled on the WAIS two cases relevant to climate model simulations: typical current climatological conditions, followed by warmer meteorology possibly consistent with future increasing surface melt scenarios. Other/Unknown Material Antarc* Antarctic Antarctica Ice Sheet West Antarctica SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic West Antarctica West Antarctic Ice Sheet Journal of Geophysical Research: Atmospheres 123 17 9559 9570 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Wilson, A. Scott, R. C. Cadeddu, M. P. Ghate, V. Lubin, D. Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
A shortwave spectroradiometer was deployed on the West Antarctic Ice Sheet (WAIS) as part of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) program ARM West Antarctic Radiation Experiment (AWARE). This instrument recorded 1-min averages of downwelling hemispheric spectral irradiance covering the wavelength range 350–2,200 nm with spectral resolution 3 and 10 nm for wavelengths shorter and longer than 1,000 nm, respectively. Using simultaneous micropulse lidar data to identify the thermodynamic phase of stratiform clouds, a radiative transfer algorithm is used here to retrieve optical depth and effective droplet (or particle) size for single-phase liquid water and ice water clouds. The AWARE campaign on the WAIS first sampled typical climatological conditions between 7 December 2015 and 9 January 2016 and then a much warmer air mass with more moisture associated with a surface melt event between 10 and 17 January 2016. Before the melt event most liquid cloud effective droplet radii were consistent with pristine polar maritime clouds (mode radius 13.5 μm) but showed a second local maximum in the distribution (at 8 μm) consistent with colder, moisture-limited conditions. Most ice clouds sampled occurred before the melt event (mode optical depth 4 and effective particle size 19 μm). During the melt event liquid water cloud optical depth nearly doubled (mode value increasing from 8 to 14). AWARE therefore sampled on the WAIS two cases relevant to climate model simulations: typical current climatological conditions, followed by warmer meteorology possibly consistent with future increasing surface melt scenarios. |
author |
Wilson, A. Scott, R. C. Cadeddu, M. P. Ghate, V. Lubin, D. |
author_facet |
Wilson, A. Scott, R. C. Cadeddu, M. P. Ghate, V. Lubin, D. |
author_sort |
Wilson, A. |
title |
Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE |
title_short |
Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE |
title_full |
Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE |
title_fullStr |
Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE |
title_full_unstemmed |
Cloud Optical Properties Over West Antarctica From Shortwave Spectroradiometer Measurements During AWARE |
title_sort |
cloud optical properties over west antarctica from shortwave spectroradiometer measurements during aware |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1484684 https://www.osti.gov/biblio/1484684 https://doi.org/10.1029/2018JD028347 |
geographic |
Antarctic West Antarctica West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctica West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet West Antarctica |
op_relation |
http://www.osti.gov/servlets/purl/1484684 https://www.osti.gov/biblio/1484684 https://doi.org/10.1029/2018JD028347 doi:10.1029/2018JD028347 |
op_doi |
https://doi.org/10.1029/2018JD028347 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
17 |
container_start_page |
9559 |
op_container_end_page |
9570 |
_version_ |
1772810044798140416 |