The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice
In the polar regions, the atmospheric boundary layer (ABL) characteristics are strongly influenced by convection over leads, which are elongated channels in the sea ice covered ocean. The effects on the ABL depend on meteorological forcing and lead geometry. In non-convection-resolving models, in wh...
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Online Access: | https://epic.awi.de/id/eprint/55519/ https://epic.awi.de/id/eprint/55519/1/atmosphere-13-00148-v3.pdf https://www.mdpi.com/2073-4433/13/1/148 https://hdl.handle.net/10013/epic.4e819e91-1100-4b3a-b2b9-dfb897934242 https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:55519 2023-05-15T18:16:56+02:00 The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice Michaelis, Janosch Lüpkes, Christof 2022-01-17 application/pdf https://epic.awi.de/id/eprint/55519/ https://epic.awi.de/id/eprint/55519/1/atmosphere-13-00148-v3.pdf https://www.mdpi.com/2073-4433/13/1/148 https://hdl.handle.net/10013/epic.4e819e91-1100-4b3a-b2b9-dfb897934242 https://hdl.handle.net/ unknown MDPI https://epic.awi.de/id/eprint/55519/1/atmosphere-13-00148-v3.pdf https://hdl.handle.net/ Michaelis, J. orcid:0000-0002-0564-2083 and Lüpkes, C. orcid:0000-0001-6518-0717 (2022) The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice , Atmosphere, 13 (1) . doi:10.3390/atmos13010148 <https://doi.org/10.3390/atmos13010148> , hdl:10013/epic.4e819e91-1100-4b3a-b2b9-dfb897934242 EPIC3Atmosphere, MDPI, 13(1) Article isiRev 2022 ftawi https://doi.org/10.3390/atmos13010148 2022-01-31T00:10:13Z In the polar regions, the atmospheric boundary layer (ABL) characteristics are strongly influenced by convection over leads, which are elongated channels in the sea ice covered ocean. The effects on the ABL depend on meteorological forcing and lead geometry. In non-convection-resolving models, in which several leads of potentially different characteristics might be present in a single grid cell, such surface characteristics and the corresponding ABL patterns are not resolved. Our main goal is to investigate potential implications for such models when these subgrid-scale patterns are not considered appropriately. We performed non-eddy-resolving microscale simulations over five different domains with leads of different widths separated by 100% sea ice. We also performed coarser-resolved simulations over a domain representing a few grid cells of a regional climate model, wherein leads were not resolved but accounted for via a fractional sea ice cover of 91% in each cell. Domain size and mean sea ice concentration were the same in all simulations. Differences in the domain-averaged ABL profiles and patterns of wind, temperature, and turbulent fluxes indicate a strong impact of both the leads and their geometry. Additional evaluations of different turbulence parameterizations show large effects by both gradient-independent heat transport and vertical entrainment. Article in Journal/Newspaper Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Atmosphere 13 1 148 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In the polar regions, the atmospheric boundary layer (ABL) characteristics are strongly influenced by convection over leads, which are elongated channels in the sea ice covered ocean. The effects on the ABL depend on meteorological forcing and lead geometry. In non-convection-resolving models, in which several leads of potentially different characteristics might be present in a single grid cell, such surface characteristics and the corresponding ABL patterns are not resolved. Our main goal is to investigate potential implications for such models when these subgrid-scale patterns are not considered appropriately. We performed non-eddy-resolving microscale simulations over five different domains with leads of different widths separated by 100% sea ice. We also performed coarser-resolved simulations over a domain representing a few grid cells of a regional climate model, wherein leads were not resolved but accounted for via a fractional sea ice cover of 91% in each cell. Domain size and mean sea ice concentration were the same in all simulations. Differences in the domain-averaged ABL profiles and patterns of wind, temperature, and turbulent fluxes indicate a strong impact of both the leads and their geometry. Additional evaluations of different turbulence parameterizations show large effects by both gradient-independent heat transport and vertical entrainment. |
format |
Article in Journal/Newspaper |
author |
Michaelis, Janosch Lüpkes, Christof |
spellingShingle |
Michaelis, Janosch Lüpkes, Christof The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice |
author_facet |
Michaelis, Janosch Lüpkes, Christof |
author_sort |
Michaelis, Janosch |
title |
The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice |
title_short |
The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice |
title_full |
The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice |
title_fullStr |
The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice |
title_full_unstemmed |
The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice |
title_sort |
impact of lead patterns on mean profiles of wind, temperature, and turbulent fluxes in the atmospheric boundary layer over sea ice |
publisher |
MDPI |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/55519/ https://epic.awi.de/id/eprint/55519/1/atmosphere-13-00148-v3.pdf https://www.mdpi.com/2073-4433/13/1/148 https://hdl.handle.net/10013/epic.4e819e91-1100-4b3a-b2b9-dfb897934242 https://hdl.handle.net/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
EPIC3Atmosphere, MDPI, 13(1) |
op_relation |
https://epic.awi.de/id/eprint/55519/1/atmosphere-13-00148-v3.pdf https://hdl.handle.net/ Michaelis, J. orcid:0000-0002-0564-2083 and Lüpkes, C. orcid:0000-0001-6518-0717 (2022) The Impact of Lead Patterns on Mean Profiles of Wind, Temperature, and Turbulent Fluxes in the Atmospheric Boundary Layer over Sea Ice , Atmosphere, 13 (1) . doi:10.3390/atmos13010148 <https://doi.org/10.3390/atmos13010148> , hdl:10013/epic.4e819e91-1100-4b3a-b2b9-dfb897934242 |
op_doi |
https://doi.org/10.3390/atmos13010148 |
container_title |
Atmosphere |
container_volume |
13 |
container_issue |
1 |
container_start_page |
148 |
_version_ |
1766190894856273920 |