Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions
This study evaluates methods to derive the surface mixing layer (SML) height of the Arctic atmospheric boundary layer (ABL) using in situ measurements inside the Arctic ABL during winter and the transition period to spring. An instrumental payload carried by a tethered balloon was used for the measu...
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ftdoajarticles:oai:doaj.org/article:a53a00efe31d4385aabb371554899f1a 2024-01-21T10:03:07+01:00 Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions E. F. Akansu S. Dahlke H. Siebert M. Wendisch 2023-12-01T00:00:00Z https://doi.org/10.5194/acp-23-15473-2023 https://doaj.org/article/a53a00efe31d4385aabb371554899f1a EN eng Copernicus Publications https://acp.copernicus.org/articles/23/15473/2023/acp-23-15473-2023.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-23-15473-2023 1680-7316 1680-7324 https://doaj.org/article/a53a00efe31d4385aabb371554899f1a Atmospheric Chemistry and Physics, Vol 23, Pp 15473-15489 (2023) Physics QC1-999 Chemistry QD1-999 article 2023 ftdoajarticles https://doi.org/10.5194/acp-23-15473-2023 2023-12-24T01:45:20Z This study evaluates methods to derive the surface mixing layer (SML) height of the Arctic atmospheric boundary layer (ABL) using in situ measurements inside the Arctic ABL during winter and the transition period to spring. An instrumental payload carried by a tethered balloon was used for the measurements between December 2019 and May 2020 during the year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. Vertically highly resolved (centimeter scale) in situ profile measurements of mean and turbulent parameters were obtained, reaching from the sea ice to several hundred meters above ground. Two typical conditions of the Arctic ABL over sea ice were identified: cloudless situations with a shallow surface-based inversion and cloudy conditions with an elevated inversion. Both conditions are associated with significantly different SML heights whose determination as accurately as possible is of great importance for many applications. We used the measured turbulence profile data to define a reference of the SML height. With this reference, a more precise critical bulk Richardson number of 0.12 was derived, which allows an extension of the SML height determination to regular radiosoundings. Furthermore, we have tested the applicability of the Monin–Obukhov similarity theory to derive SML heights based on measured turbulent surface fluxes. The application of the different approaches and their advantages and disadvantages are discussed. Article in Journal/Newspaper Arctic polar night Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Chemistry and Physics 23 24 15473 15489 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 E. F. Akansu S. Dahlke H. Siebert M. Wendisch Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
This study evaluates methods to derive the surface mixing layer (SML) height of the Arctic atmospheric boundary layer (ABL) using in situ measurements inside the Arctic ABL during winter and the transition period to spring. An instrumental payload carried by a tethered balloon was used for the measurements between December 2019 and May 2020 during the year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. Vertically highly resolved (centimeter scale) in situ profile measurements of mean and turbulent parameters were obtained, reaching from the sea ice to several hundred meters above ground. Two typical conditions of the Arctic ABL over sea ice were identified: cloudless situations with a shallow surface-based inversion and cloudy conditions with an elevated inversion. Both conditions are associated with significantly different SML heights whose determination as accurately as possible is of great importance for many applications. We used the measured turbulence profile data to define a reference of the SML height. With this reference, a more precise critical bulk Richardson number of 0.12 was derived, which allows an extension of the SML height determination to regular radiosoundings. Furthermore, we have tested the applicability of the Monin–Obukhov similarity theory to derive SML heights based on measured turbulent surface fluxes. The application of the different approaches and their advantages and disadvantages are discussed. |
format |
Article in Journal/Newspaper |
author |
E. F. Akansu S. Dahlke H. Siebert M. Wendisch |
author_facet |
E. F. Akansu S. Dahlke H. Siebert M. Wendisch |
author_sort |
E. F. Akansu |
title |
Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions |
title_short |
Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions |
title_full |
Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions |
title_fullStr |
Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions |
title_full_unstemmed |
Evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central Arctic during polar night and transition to polar day in cloudless and cloudy conditions |
title_sort |
evaluation of methods to determine the surface mixing layer height of the atmospheric boundary layer in the central arctic during polar night and transition to polar day in cloudless and cloudy conditions |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-23-15473-2023 https://doaj.org/article/a53a00efe31d4385aabb371554899f1a |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic polar night Sea ice |
genre_facet |
Arctic polar night Sea ice |
op_source |
Atmospheric Chemistry and Physics, Vol 23, Pp 15473-15489 (2023) |
op_relation |
https://acp.copernicus.org/articles/23/15473/2023/acp-23-15473-2023.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-23-15473-2023 1680-7316 1680-7324 https://doaj.org/article/a53a00efe31d4385aabb371554899f1a |
op_doi |
https://doi.org/10.5194/acp-23-15473-2023 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
23 |
container_issue |
24 |
container_start_page |
15473 |
op_container_end_page |
15489 |
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1788693370729660416 |