Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet
Surface radiative cooling in polar regions can generate persistent stability in the atmospheric boundary layer. Stable layers below clouds can decouple the cloud layer from the near-surface environment. Under these conditions, surface aerosol measurements are not necessarily representative of the ne...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00072404 2024-04-21T08:03:16+00:00 Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet Guy, Heather Martin, Andrew S. Olson, Erik Brooks, Ian M. Neely III, Ryan R. 2024-03 electronic https://doi.org/10.5194/egusphere-2024-733 https://noa.gwlb.de/receive/cop_mods_00072404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070619/egusphere-2024-733.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-733/egusphere-2024-733.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2024-733 https://noa.gwlb.de/receive/cop_mods_00072404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070619/egusphere-2024-733.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-733/egusphere-2024-733.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2024-733 2024-03-26T15:13:22Z Surface radiative cooling in polar regions can generate persistent stability in the atmospheric boundary layer. Stable layers below clouds can decouple the cloud layer from the near-surface environment. Under these conditions, surface aerosol measurements are not necessarily representative of the near-cloud or intra-cloud aerosol populations. To better understand the variability in the vertical structure of aerosol properties over the central Greenland Ice Sheet, in-situ measurements of aerosol particle size distributions up to cloud base were made at Summit Station in July and August 2023. These measurements identified distinct vertical aerosol layers between the surface and cloud base associated thermodynamic decoupling layers. Such decoupling layers occur 49 % of the time during the summer in central Greenland, suggesting that surface aerosol measurements are insufficient to describe the cloud-relevant aerosol population half of the time. Experience during this first measurement season demonstrated the ability of a tethered balloon platform to operate effectively under icing conditions and at low surface pressure (< 680 hPa). The results presented here illustrate the value of vertically resolved in-situ measurements of aerosol properties to develop a nuanced understanding of the aerosol effects on cloud properties in polar regions. Article in Journal/Newspaper Greenland Ice Sheet Niedersächsisches Online-Archiv NOA |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Guy, Heather Martin, Andrew S. Olson, Erik Brooks, Ian M. Neely III, Ryan R. Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet |
topic_facet |
article Verlagsveröffentlichung |
description |
Surface radiative cooling in polar regions can generate persistent stability in the atmospheric boundary layer. Stable layers below clouds can decouple the cloud layer from the near-surface environment. Under these conditions, surface aerosol measurements are not necessarily representative of the near-cloud or intra-cloud aerosol populations. To better understand the variability in the vertical structure of aerosol properties over the central Greenland Ice Sheet, in-situ measurements of aerosol particle size distributions up to cloud base were made at Summit Station in July and August 2023. These measurements identified distinct vertical aerosol layers between the surface and cloud base associated thermodynamic decoupling layers. Such decoupling layers occur 49 % of the time during the summer in central Greenland, suggesting that surface aerosol measurements are insufficient to describe the cloud-relevant aerosol population half of the time. Experience during this first measurement season demonstrated the ability of a tethered balloon platform to operate effectively under icing conditions and at low surface pressure (< 680 hPa). The results presented here illustrate the value of vertically resolved in-situ measurements of aerosol properties to develop a nuanced understanding of the aerosol effects on cloud properties in polar regions. |
format |
Article in Journal/Newspaper |
author |
Guy, Heather Martin, Andrew S. Olson, Erik Brooks, Ian M. Neely III, Ryan R. |
author_facet |
Guy, Heather Martin, Andrew S. Olson, Erik Brooks, Ian M. Neely III, Ryan R. |
author_sort |
Guy, Heather |
title |
Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet |
title_short |
Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet |
title_full |
Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet |
title_fullStr |
Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet |
title_full_unstemmed |
Measurement report: In-situ vertical profiles of below-cloud aerosol over the central Greenland Ice Sheet |
title_sort |
measurement report: in-situ vertical profiles of below-cloud aerosol over the central greenland ice sheet |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-733 https://noa.gwlb.de/receive/cop_mods_00072404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070619/egusphere-2024-733.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-733/egusphere-2024-733.pdf |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://doi.org/10.5194/egusphere-2024-733 https://noa.gwlb.de/receive/cop_mods_00072404 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070619/egusphere-2024-733.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-733/egusphere-2024-733.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2024-733 |
_version_ |
1796943193388875776 |