Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration
Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402, doi:10.1002/2013JD0203...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/6502 2023-05-15T14:50:10+02:00 Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration Seo, Hyodae Yang, Jiayan 2013-11-20 application/pdf https://hdl.handle.net/1912/6502 en_US eng John Wiley & Sons https://doi.org/10.1002/2013JD020312 Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402 https://hdl.handle.net/1912/6502 doi:10.1002/2013JD020312 Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402 doi:10.1002/2013JD020312 Sea-ice concentration Boundary layer process Arctic sea ice Atmospheric modeling Article 2013 ftwhoas https://doi.org/10.1002/2013JD020312 2022-05-28T22:59:03Z Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402, doi:10.1002/2013JD020312. Impact of sea-ice concentration (SIC) on the Arctic atmospheric boundary layer (ABL) is investigated using a polar-optimized version of the Weather Research and Forecasting (Polar WRF) model forced with SIC conditions during three different years. We present a detailed comparison of the simulations with historical ship and ice station based data focusing on September. Our analysis shows that Polar WRF provides a reasonable representation of the observed ABL evolution provided that SIC uncertainties are small. Lower skill is obtained, however, with elevated SIC uncertainties associated with incorrect seasonal evolution of sea ice and misrepresentation of ice thickness near the marginal ice zone (MIZ). The result underscores the importance of accurate representation of ice conditions for skillful simulation of the Arctic ABL. Further, two dynamically distinctive effects of sea ice on the surface wind were found, which act on different spatial scales. Reduced SIC lowers ABL stability, thereby increasing surface-wind (W10) speeds. The spatial scale of this response is comparable to the basin scale of the SIC difference. In contrast, near-surface geostrophic wind (Wg) shows a strong response in the MIZ, where a good spatial correspondence exists among the Laplacian of the sea level pressure (SLP), the surface-wind convergence, and the vertical motion within the ABL. This indicates that SIC affects Wg through variation in SLP but on a much narrower scale. Larger-amplitude and broader-scale response in W10 implies that surface-wind stress derived from Wg to drive ice-ocean models may not fully reflect the effect of SIC changes. The authors acknowledge the support from WHOI Arctic Research Initiative and National ... Article in Journal/Newspaper Arctic Sea ice Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Journal of Geophysical Research: Atmospheres 118 22 12,383 12,402 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Sea-ice concentration Boundary layer process Arctic sea ice Atmospheric modeling |
spellingShingle |
Sea-ice concentration Boundary layer process Arctic sea ice Atmospheric modeling Seo, Hyodae Yang, Jiayan Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
topic_facet |
Sea-ice concentration Boundary layer process Arctic sea ice Atmospheric modeling |
description |
Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402, doi:10.1002/2013JD020312. Impact of sea-ice concentration (SIC) on the Arctic atmospheric boundary layer (ABL) is investigated using a polar-optimized version of the Weather Research and Forecasting (Polar WRF) model forced with SIC conditions during three different years. We present a detailed comparison of the simulations with historical ship and ice station based data focusing on September. Our analysis shows that Polar WRF provides a reasonable representation of the observed ABL evolution provided that SIC uncertainties are small. Lower skill is obtained, however, with elevated SIC uncertainties associated with incorrect seasonal evolution of sea ice and misrepresentation of ice thickness near the marginal ice zone (MIZ). The result underscores the importance of accurate representation of ice conditions for skillful simulation of the Arctic ABL. Further, two dynamically distinctive effects of sea ice on the surface wind were found, which act on different spatial scales. Reduced SIC lowers ABL stability, thereby increasing surface-wind (W10) speeds. The spatial scale of this response is comparable to the basin scale of the SIC difference. In contrast, near-surface geostrophic wind (Wg) shows a strong response in the MIZ, where a good spatial correspondence exists among the Laplacian of the sea level pressure (SLP), the surface-wind convergence, and the vertical motion within the ABL. This indicates that SIC affects Wg through variation in SLP but on a much narrower scale. Larger-amplitude and broader-scale response in W10 implies that surface-wind stress derived from Wg to drive ice-ocean models may not fully reflect the effect of SIC changes. The authors acknowledge the support from WHOI Arctic Research Initiative and National ... |
format |
Article in Journal/Newspaper |
author |
Seo, Hyodae Yang, Jiayan |
author_facet |
Seo, Hyodae Yang, Jiayan |
author_sort |
Seo, Hyodae |
title |
Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
title_short |
Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
title_full |
Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
title_fullStr |
Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
title_full_unstemmed |
Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
title_sort |
dynamical response of the arctic atmospheric boundary layer process to uncertainties in sea-ice concentration |
publisher |
John Wiley & Sons |
publishDate |
2013 |
url |
https://hdl.handle.net/1912/6502 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402 doi:10.1002/2013JD020312 |
op_relation |
https://doi.org/10.1002/2013JD020312 Journal of Geophysical Research: Atmospheres 118 (2013): 12,383–12,402 https://hdl.handle.net/1912/6502 doi:10.1002/2013JD020312 |
op_doi |
https://doi.org/10.1002/2013JD020312 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
118 |
container_issue |
22 |
container_start_page |
12,383 |
op_container_end_page |
12,402 |
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1766321217216708608 |