Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign
The airborne field campaign HALO–(AC)³ took place from 07 March to 12 April 2022 and was designed to observe the transformation of air masses during their meridional transport in the North Atlantic sector of the Arctic. We evaluate the meteorological and sea ice conditions during the campaign based...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00065897 2023-06-11T04:09:04+02:00 Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign Walbröl, Andreas Michaelis, Janosch Becker, Sebastian Dorff, Henning Gorodetskaya, Irina Kirbus, Benjamin Lauer, Melanie Maherndl, Nina Maturilli, Marion Mayer, Johanna Müller, Hanno Neggers, Roel A. J. Paulus, Fiona M. Röttenbacher, Johannes Rückert, Janna E. Schirmacher, Imke Slättberg, Nils Ehrlich, André Wendisch, Manfred Crewell, Susanne 2023-04 electronic https://doi.org/10.5194/egusphere-2023-668 https://noa.gwlb.de/receive/cop_mods_00065897 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064405/egusphere-2023-668.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-668/egusphere-2023-668.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-668 https://noa.gwlb.de/receive/cop_mods_00065897 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064405/egusphere-2023-668.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-668/egusphere-2023-668.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-668 2023-04-23T23:20:00Z The airborne field campaign HALO–(AC)³ took place from 07 March to 12 April 2022 and was designed to observe the transformation of air masses during their meridional transport in the North Atlantic sector of the Arctic. We evaluate the meteorological and sea ice conditions during the campaign based on the European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis v5 (ERA5), satellite data, and atmospheric soundings with respect to climatology and describe special synoptic events. HALO–(AC)³ started with a warm period (11–20 March) where strong southerly winds prevailed that caused moist and warm air intrusions (MWAIs). Two MWAIs were detected as Atmospheric Rivers (ARs). Compared to the ERA5 climatology (1979–2022), record breaking vertically integrated poleward heat and moisture fluxes averaged over 75.0–81.5° N were found. The related warm and moist air masses reached the central Arctic, causing the highest rainfall rates over the sea ice northwest of Svalbard recorded since the beginning of the ERA5 climatology. Subsequently, the cold period of HALO–(AC)³ started after the passage of a Shapiro–Keyser cyclone on 21 March when the wind regime turned to northerlies, advecting colder air into the Fram Strait. Until 08 April, marine cold air outbreaks (MCAOs) prevailed, including two strong MCAO events on 21–26 March and 01–02 April. In between, aged subpolar warm air was advected to the Fram Strait with northeasterly and easterly winds. On average, the campaign period was warmer than the climatology, especially due to the exceptionally strong ARs during the warm period. In the Fram Strait, the sea ice concentration (SIC) was within the 10–90th percentiles of the climatology over the entire campaign duration. During the warm period, SIC was strongly reduced and an untypically large polynya for this season opened north of Svalbard. During the cold period, the polynya was closed again and above average SICs were found. We describe the environmental conditions of a Polar Low and far north reaching cirrus ... Article in Journal/Newspaper Arctic Fram Strait North Atlantic Sea ice Svalbard Niedersächsisches Online-Archiv NOA Arctic Svalbard |
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Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Walbröl, Andreas Michaelis, Janosch Becker, Sebastian Dorff, Henning Gorodetskaya, Irina Kirbus, Benjamin Lauer, Melanie Maherndl, Nina Maturilli, Marion Mayer, Johanna Müller, Hanno Neggers, Roel A. J. Paulus, Fiona M. Röttenbacher, Johannes Rückert, Janna E. Schirmacher, Imke Slättberg, Nils Ehrlich, André Wendisch, Manfred Crewell, Susanne Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign |
topic_facet |
article Verlagsveröffentlichung |
description |
The airborne field campaign HALO–(AC)³ took place from 07 March to 12 April 2022 and was designed to observe the transformation of air masses during their meridional transport in the North Atlantic sector of the Arctic. We evaluate the meteorological and sea ice conditions during the campaign based on the European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis v5 (ERA5), satellite data, and atmospheric soundings with respect to climatology and describe special synoptic events. HALO–(AC)³ started with a warm period (11–20 March) where strong southerly winds prevailed that caused moist and warm air intrusions (MWAIs). Two MWAIs were detected as Atmospheric Rivers (ARs). Compared to the ERA5 climatology (1979–2022), record breaking vertically integrated poleward heat and moisture fluxes averaged over 75.0–81.5° N were found. The related warm and moist air masses reached the central Arctic, causing the highest rainfall rates over the sea ice northwest of Svalbard recorded since the beginning of the ERA5 climatology. Subsequently, the cold period of HALO–(AC)³ started after the passage of a Shapiro–Keyser cyclone on 21 March when the wind regime turned to northerlies, advecting colder air into the Fram Strait. Until 08 April, marine cold air outbreaks (MCAOs) prevailed, including two strong MCAO events on 21–26 March and 01–02 April. In between, aged subpolar warm air was advected to the Fram Strait with northeasterly and easterly winds. On average, the campaign period was warmer than the climatology, especially due to the exceptionally strong ARs during the warm period. In the Fram Strait, the sea ice concentration (SIC) was within the 10–90th percentiles of the climatology over the entire campaign duration. During the warm period, SIC was strongly reduced and an untypically large polynya for this season opened north of Svalbard. During the cold period, the polynya was closed again and above average SICs were found. We describe the environmental conditions of a Polar Low and far north reaching cirrus ... |
format |
Article in Journal/Newspaper |
author |
Walbröl, Andreas Michaelis, Janosch Becker, Sebastian Dorff, Henning Gorodetskaya, Irina Kirbus, Benjamin Lauer, Melanie Maherndl, Nina Maturilli, Marion Mayer, Johanna Müller, Hanno Neggers, Roel A. J. Paulus, Fiona M. Röttenbacher, Johannes Rückert, Janna E. Schirmacher, Imke Slättberg, Nils Ehrlich, André Wendisch, Manfred Crewell, Susanne |
author_facet |
Walbröl, Andreas Michaelis, Janosch Becker, Sebastian Dorff, Henning Gorodetskaya, Irina Kirbus, Benjamin Lauer, Melanie Maherndl, Nina Maturilli, Marion Mayer, Johanna Müller, Hanno Neggers, Roel A. J. Paulus, Fiona M. Röttenbacher, Johannes Rückert, Janna E. Schirmacher, Imke Slättberg, Nils Ehrlich, André Wendisch, Manfred Crewell, Susanne |
author_sort |
Walbröl, Andreas |
title |
Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign |
title_short |
Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign |
title_full |
Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign |
title_fullStr |
Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign |
title_full_unstemmed |
Environmental conditions in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign |
title_sort |
environmental conditions in the north atlantic sector of the arctic during the halo–(ac)³ campaign |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-668 https://noa.gwlb.de/receive/cop_mods_00065897 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064405/egusphere-2023-668.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-668/egusphere-2023-668.pdf |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Fram Strait North Atlantic Sea ice Svalbard |
genre_facet |
Arctic Fram Strait North Atlantic Sea ice Svalbard |
op_relation |
https://doi.org/10.5194/egusphere-2023-668 https://noa.gwlb.de/receive/cop_mods_00065897 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064405/egusphere-2023-668.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-668/egusphere-2023-668.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-668 |
_version_ |
1768382769927290880 |