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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2015
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D8PZ58QH 2023-05-15T14:51:36+02:00 Airmass Origin in the Arctic. Part I: Seasonality Orbe, Clara Newman, Paul A. Waugh, Darryn W. Holzer, Markus Oman, Luke D. Li, Feng Polvani, Lorenzo M. 2015 https://doi.org/10.7916/D8PZ58QH English eng American Meteorological Society https://doi.org/10.7916/D8PZ58QH Climatic changes Air masses Atmospheric physics Atmospheric circulation Seasons Climatology Articles 2015 ftcolumbiauniv https://doi.org/10.7916/D8PZ58QH 2019-04-04T08:14:12Z 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 Columbia University: Academic Commons Arctic Pacific |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Climatic changes Air masses Atmospheric physics Atmospheric circulation Seasons Climatology |
spellingShingle |
Climatic changes Air masses Atmospheric physics Atmospheric circulation Seasons Climatology Orbe, Clara Newman, Paul A. Waugh, Darryn W. Holzer, Markus Oman, Luke D. Li, Feng Polvani, Lorenzo M. Airmass Origin in the Arctic. Part I: Seasonality |
topic_facet |
Climatic changes Air masses Atmospheric physics Atmospheric circulation Seasons Climatology |
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, Clara Newman, Paul A. Waugh, Darryn W. Holzer, Markus Oman, Luke D. Li, Feng Polvani, Lorenzo M. |
author_facet |
Orbe, Clara Newman, Paul A. Waugh, Darryn W. Holzer, Markus Oman, Luke D. Li, Feng Polvani, Lorenzo M. |
author_sort |
Orbe, Clara |
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 |
https://doi.org/10.7916/D8PZ58QH |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://doi.org/10.7916/D8PZ58QH |
op_doi |
https://doi.org/10.7916/D8PZ58QH |
_version_ |
1766322743531274240 |