Airmass origin in the Arctic. Part I: Seasonality
The first climatology of airmass origin in the Arctic is presented in terms of rigorously defined airmass fractions that partition air according to where it last contacted the planetary boundary layer (PBL). Results from a present-day climate integration of the Goddard Earth Observing System Chemist...
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American Meteorological Society
2015
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Online Access: | http://hdl.handle.net/1959.4/unsworks_37748 https://unsworks.unsw.edu.au/bitstreams/6e384976-4ba7-409d-a55f-2d3bfd1b8a7c/download https://doi.org/10.1175/JCLI-D-14-00720.1 |
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ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/unsworks_37748 2024-05-12T07:59:11+00:00 Airmass origin in the Arctic. Part I: Seasonality Orbe, C Newman, PA Waugh, DW Holzer, M Oman, LD Li, F Polvani, LM 2015-01-01 application/pdf http://hdl.handle.net/1959.4/unsworks_37748 https://unsworks.unsw.edu.au/bitstreams/6e384976-4ba7-409d-a55f-2d3bfd1b8a7c/download https://doi.org/10.1175/JCLI-D-14-00720.1 unknown American Meteorological Society http://purl.org/au-research/grants/arc/DP120100674 http://hdl.handle.net/1959.4/unsworks_37748 https://unsworks.unsw.edu.au/bitstreams/6e384976-4ba7-409d-a55f-2d3bfd1b8a7c/download https://doi.org/10.1175/JCLI-D-14-00720.1 open access https://purl.org/coar/access_right/c_abf2 CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ free_to_read urn:ISSN:0894-8755 urn:ISSN:1520-0442 Journal of Climate, 28, 12, 4997-5014 13 Climate Action anzsrc-for: 0401 Atmospheric Sciences anzsrc-for: 0405 Oceanography anzsrc-for: 0909 Geomatic Engineering journal article http://purl.org/coar/resource_type/c_6501 2015 ftunswworks https://doi.org/10.1175/JCLI-D-14-00720.1 2024-04-17T14:47:43Z The first climatology of airmass origin in the Arctic is presented in terms of rigorously defined airmass fractions that partition air according to where it last contacted the planetary boundary layer (PBL). Results from a present-day climate integration of the Goddard Earth Observing System Chemistry-Climate Model (GEOSCCM) reveal that the majority of air in the Arctic below 700 mb last contacted the PBL poleward of 60°N. By comparison, 62% (±0.8%) of the air above 700 mb originates over Northern Hemisphere midlatitudes (i.e., "midlatitude air"). Seasonal variations in the airmass fractions above 700 mb reveal that during boreal winter air from midlatitudes originates primarily over the oceans, with 26% (±1.9%) last contacting the PBL over the eastern Pacific, 21% (±0.87%) over the Atlantic, and 16% (±1.2%) over the western Pacific. During summer, by comparison, midlatitude air originates primarily over land, overwhelmingly so over Asia [41% (±1.0%)] and, to a lesser extent, over North America [24% (±1.5%)]. Seasonal variations in the airmass fractions are interpreted in terms of changes in the large-scale ventilation of the midlatitude boundary layer and the midlatitude tropospheric jet. Article in Journal/Newspaper Arctic UNSW Sydney (The University of New South Wales): UNSWorks Arctic Pacific Journal of Climate 28 12 4997 5014 |
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Open Polar |
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UNSW Sydney (The University of New South Wales): UNSWorks |
op_collection_id |
ftunswworks |
language |
unknown |
topic |
13 Climate Action anzsrc-for: 0401 Atmospheric Sciences anzsrc-for: 0405 Oceanography anzsrc-for: 0909 Geomatic Engineering |
spellingShingle |
13 Climate Action anzsrc-for: 0401 Atmospheric Sciences anzsrc-for: 0405 Oceanography anzsrc-for: 0909 Geomatic Engineering Orbe, C Newman, PA Waugh, DW Holzer, M Oman, LD Li, F Polvani, LM Airmass origin in the Arctic. Part I: Seasonality |
topic_facet |
13 Climate Action anzsrc-for: 0401 Atmospheric Sciences anzsrc-for: 0405 Oceanography anzsrc-for: 0909 Geomatic Engineering |
description |
The first climatology of airmass origin in the Arctic is presented in terms of rigorously defined airmass fractions that partition air according to where it last contacted the planetary boundary layer (PBL). Results from a present-day climate integration of the Goddard Earth Observing System Chemistry-Climate Model (GEOSCCM) reveal that the majority of air in the Arctic below 700 mb last contacted the PBL poleward of 60°N. By comparison, 62% (±0.8%) of the air above 700 mb originates over Northern Hemisphere midlatitudes (i.e., "midlatitude air"). Seasonal variations in the airmass fractions above 700 mb reveal that during boreal winter air from midlatitudes originates primarily over the oceans, with 26% (±1.9%) last contacting the PBL over the eastern Pacific, 21% (±0.87%) over the Atlantic, and 16% (±1.2%) over the western Pacific. During summer, by comparison, midlatitude air originates primarily over land, overwhelmingly so over Asia [41% (±1.0%)] and, to a lesser extent, over North America [24% (±1.5%)]. Seasonal variations in the airmass fractions are interpreted in terms of changes in the large-scale ventilation of the midlatitude boundary layer and the midlatitude tropospheric jet. |
format |
Article in Journal/Newspaper |
author |
Orbe, C Newman, PA Waugh, DW Holzer, M Oman, LD Li, F Polvani, LM |
author_facet |
Orbe, C Newman, PA Waugh, DW Holzer, M Oman, LD Li, F Polvani, LM |
author_sort |
Orbe, C |
title |
Airmass origin in the Arctic. Part I: Seasonality |
title_short |
Airmass origin in the Arctic. Part I: Seasonality |
title_full |
Airmass origin in the Arctic. Part I: Seasonality |
title_fullStr |
Airmass origin in the Arctic. Part I: Seasonality |
title_full_unstemmed |
Airmass origin in the Arctic. Part I: Seasonality |
title_sort |
airmass origin in the arctic. part i: seasonality |
publisher |
American Meteorological Society |
publishDate |
2015 |
url |
http://hdl.handle.net/1959.4/unsworks_37748 https://unsworks.unsw.edu.au/bitstreams/6e384976-4ba7-409d-a55f-2d3bfd1b8a7c/download https://doi.org/10.1175/JCLI-D-14-00720.1 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
urn:ISSN:0894-8755 urn:ISSN:1520-0442 Journal of Climate, 28, 12, 4997-5014 |
op_relation |
http://purl.org/au-research/grants/arc/DP120100674 http://hdl.handle.net/1959.4/unsworks_37748 https://unsworks.unsw.edu.au/bitstreams/6e384976-4ba7-409d-a55f-2d3bfd1b8a7c/download https://doi.org/10.1175/JCLI-D-14-00720.1 |
op_rights |
open access https://purl.org/coar/access_right/c_abf2 CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ free_to_read |
op_doi |
https://doi.org/10.1175/JCLI-D-14-00720.1 |
container_title |
Journal of Climate |
container_volume |
28 |
container_issue |
12 |
container_start_page |
4997 |
op_container_end_page |
5014 |
_version_ |
1798840178101452800 |