Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign
Cold-air outbreaks (CAOs) are characterized by extreme air–sea energy exchanges and low-level convective clouds over large areas in the high-latitude oceans. As such, CAOs are an important component of the Earth's climate system. The CAOs in the Marine Boundary Layer Experiment (COMBLE) deploym...
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ftdoajarticles:oai:doaj.org/article:6e1caa6046ce4721a7ea2728a36f4214 2023-05-15T17:41:53+02:00 Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign Z. Mages P. Kollias Z. Zhu E. P. Luke 2023-03-01T00:00:00Z https://doi.org/10.5194/acp-23-3561-2023 https://doaj.org/article/6e1caa6046ce4721a7ea2728a36f4214 EN eng Copernicus Publications https://acp.copernicus.org/articles/23/3561/2023/acp-23-3561-2023.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-23-3561-2023 1680-7316 1680-7324 https://doaj.org/article/6e1caa6046ce4721a7ea2728a36f4214 Atmospheric Chemistry and Physics, Vol 23, Pp 3561-3574 (2023) Physics QC1-999 Chemistry QD1-999 article 2023 ftdoajarticles https://doi.org/10.5194/acp-23-3561-2023 2023-03-26T01:32:59Z Cold-air outbreaks (CAOs) are characterized by extreme air–sea energy exchanges and low-level convective clouds over large areas in the high-latitude oceans. As such, CAOs are an important component of the Earth's climate system. The CAOs in the Marine Boundary Layer Experiment (COMBLE) deployment of the US Department of Energy Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF) provided the first comprehensive view of CAOs using a suite of ground-based observations at the northern coast of Norway. Here, cloud and precipitation observations from 13 CAO cases during COMBLE are analyzed. A vertical air motion retrieval technique is applied to the Ka-band ARM Zenith-pointing Radar (KAZR) observations. The CAO cumulus clouds are characterized by strong updrafts with magnitudes between 2–8 m s −1 , vertical extents of 1–3 km, and horizontal scales of 0.25–3 km. A strong relationship between our vertical air velocity retrievals and liquid water path (LWP) measurements is found. The LWP measurements exceed 1 kg m −2 in strong updraft areas, and the vertical extent of the updraft correlates well with the LWP values. The CAO cumulus clouds exhibit eddy dissipation rate values between 10 −3 and 10 −2 m 2 s −3 in the lowest 10 km of the atmosphere, and using a radar Doppler spectra technique, evidence of secondary ice production is found during one of the cases. Article in Journal/Newspaper Northern coast of Norway Directory of Open Access Journals: DOAJ Articles Norway Atmospheric Chemistry and Physics 23 6 3561 3574 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 Z. Mages P. Kollias Z. Zhu E. P. Luke Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Cold-air outbreaks (CAOs) are characterized by extreme air–sea energy exchanges and low-level convective clouds over large areas in the high-latitude oceans. As such, CAOs are an important component of the Earth's climate system. The CAOs in the Marine Boundary Layer Experiment (COMBLE) deployment of the US Department of Energy Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF) provided the first comprehensive view of CAOs using a suite of ground-based observations at the northern coast of Norway. Here, cloud and precipitation observations from 13 CAO cases during COMBLE are analyzed. A vertical air motion retrieval technique is applied to the Ka-band ARM Zenith-pointing Radar (KAZR) observations. The CAO cumulus clouds are characterized by strong updrafts with magnitudes between 2–8 m s −1 , vertical extents of 1–3 km, and horizontal scales of 0.25–3 km. A strong relationship between our vertical air velocity retrievals and liquid water path (LWP) measurements is found. The LWP measurements exceed 1 kg m −2 in strong updraft areas, and the vertical extent of the updraft correlates well with the LWP values. The CAO cumulus clouds exhibit eddy dissipation rate values between 10 −3 and 10 −2 m 2 s −3 in the lowest 10 km of the atmosphere, and using a radar Doppler spectra technique, evidence of secondary ice production is found during one of the cases. |
format |
Article in Journal/Newspaper |
author |
Z. Mages P. Kollias Z. Zhu E. P. Luke |
author_facet |
Z. Mages P. Kollias Z. Zhu E. P. Luke |
author_sort |
Z. Mages |
title |
Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign |
title_short |
Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign |
title_full |
Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign |
title_fullStr |
Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign |
title_full_unstemmed |
Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign |
title_sort |
surface-based observations of cold-air outbreak clouds during the comble field campaign |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-23-3561-2023 https://doaj.org/article/6e1caa6046ce4721a7ea2728a36f4214 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern coast of Norway |
genre_facet |
Northern coast of Norway |
op_source |
Atmospheric Chemistry and Physics, Vol 23, Pp 3561-3574 (2023) |
op_relation |
https://acp.copernicus.org/articles/23/3561/2023/acp-23-3561-2023.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-23-3561-2023 1680-7316 1680-7324 https://doaj.org/article/6e1caa6046ce4721a7ea2728a36f4214 |
op_doi |
https://doi.org/10.5194/acp-23-3561-2023 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
23 |
container_issue |
6 |
container_start_page |
3561 |
op_container_end_page |
3574 |
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1766143703611604992 |