Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation
Surface radiometer data from Ross Island, Antarctica, collected during the austral summer 2015–2016 by the US Department of Energy Atmospheric Radiation Measurement (ARM) program West Antarctic Radiation Experiment (AWARE), are used to evaluate how shortwave and longwave irradiance respond to changi...
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ftcopernicus:oai:publications.copernicus.org:acp113367 2024-09-15T17:43:46+00:00 Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation Scarci, Kristopher Scott, Ryan C. Ghiz, Madison L. Vogelmann, Andrew M. Lubin, Dan 2024-06-10 application/pdf https://doi.org/10.5194/acp-24-6681-2024 https://acp.copernicus.org/articles/24/6681/2024/ eng eng doi:10.5194/acp-24-6681-2024 https://acp.copernicus.org/articles/24/6681/2024/ eISSN: 1680-7324 Text 2024 ftcopernicus https://doi.org/10.5194/acp-24-6681-2024 2024-08-28T05:24:22Z Surface radiometer data from Ross Island, Antarctica, collected during the austral summer 2015–2016 by the US Department of Energy Atmospheric Radiation Measurement (ARM) program West Antarctic Radiation Experiment (AWARE), are used to evaluate how shortwave and longwave irradiance respond to changing cloud properties as governed by contrasting meteorological regimes. Shortwave atmospheric transmittance is derived from pyranometer measurements, and cloud conservative-scattering optical depth is derived from filter radiometer measurements at 870 nm. With onshore flow associated with marine air masses, clouds contain mostly liquid water. With southerly flow over the Transantarctic Mountains, orographic forcing induces substantial cloud ice water content. These ice and mixed-phase clouds attenuate more surface shortwave irradiance than the maritime-influenced clouds and also emit less longwave irradiance due to colder cloud base temperature. These detected irradiance changes are in a range that can mean onset or inhibition of surface melt over ice shelves. This study demonstrates how basic and relatively low-cost broadband and filter radiometers can be used to detect subtle climatological influences of contrasting cloud microphysical properties at very remote locations. Text Antarc* Antarctic Antarctica Ice Shelves Ross Island Copernicus Publications: E-Journals Atmospheric Chemistry and Physics 24 11 6681 6697 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Surface radiometer data from Ross Island, Antarctica, collected during the austral summer 2015–2016 by the US Department of Energy Atmospheric Radiation Measurement (ARM) program West Antarctic Radiation Experiment (AWARE), are used to evaluate how shortwave and longwave irradiance respond to changing cloud properties as governed by contrasting meteorological regimes. Shortwave atmospheric transmittance is derived from pyranometer measurements, and cloud conservative-scattering optical depth is derived from filter radiometer measurements at 870 nm. With onshore flow associated with marine air masses, clouds contain mostly liquid water. With southerly flow over the Transantarctic Mountains, orographic forcing induces substantial cloud ice water content. These ice and mixed-phase clouds attenuate more surface shortwave irradiance than the maritime-influenced clouds and also emit less longwave irradiance due to colder cloud base temperature. These detected irradiance changes are in a range that can mean onset or inhibition of surface melt over ice shelves. This study demonstrates how basic and relatively low-cost broadband and filter radiometers can be used to detect subtle climatological influences of contrasting cloud microphysical properties at very remote locations. |
format |
Text |
author |
Scarci, Kristopher Scott, Ryan C. Ghiz, Madison L. Vogelmann, Andrew M. Lubin, Dan |
spellingShingle |
Scarci, Kristopher Scott, Ryan C. Ghiz, Madison L. Vogelmann, Andrew M. Lubin, Dan Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
author_facet |
Scarci, Kristopher Scott, Ryan C. Ghiz, Madison L. Vogelmann, Andrew M. Lubin, Dan |
author_sort |
Scarci, Kristopher |
title |
Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
title_short |
Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
title_full |
Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
title_fullStr |
Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
title_full_unstemmed |
Broadband and filter radiometers at Ross Island, Antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
title_sort |
broadband and filter radiometers at ross island, antarctica: detection of cloud ice phase versus liquid water influences on shortwave and longwave radiation |
publishDate |
2024 |
url |
https://doi.org/10.5194/acp-24-6681-2024 https://acp.copernicus.org/articles/24/6681/2024/ |
genre |
Antarc* Antarctic Antarctica Ice Shelves Ross Island |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelves Ross Island |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-24-6681-2024 https://acp.copernicus.org/articles/24/6681/2024/ |
op_doi |
https://doi.org/10.5194/acp-24-6681-2024 |
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Atmospheric Chemistry and Physics |
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24 |
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11 |
container_start_page |
6681 |
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6697 |
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1810490927608758272 |