Airmass Origin in the Arctic. Part I: Seasonality

Simple item page
dc.contributor.authorORBE, CLARA
dc.contributor.authorNEWMAN, PAUL A.
dc.contributor.authorWAUGH, DARRYN W.
dc.contributor.authorHOLZER, MARK
dc.contributor.authorOMAN, LUKE D.
dc.contributor.authorLI, FENG
dc.contributor.authorPOLVANI, LORENZO M.
dc.date.accessioned2023-01-30T17:28:47Z
dc.date.available2023-01-30T17:28:47Z
dc.date.issued2015-06-15
dc.description.abstractThe 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 608N. 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.en_US
dc.description.sponsorshipThis research was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by Oak Ridge Associated Universities through a contract with NASA. The authors also acknowledge support from ARC Grant DP120100674 (M.H.) and NSF Grants AGS1403676 (D.W.) and AGS-1402931 (M.H. and L.M.P.).en_US
dc.description.urihttps://journals.ametsoc.org/view/journals/clim/28/12/jcli-d-14-00720.1.xml?tab_body=pdfen_US
dc.format.extent18 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m243u1-ntdf
dc.identifier.citationOrbe, C., Newman, P. A., Waugh, D. W., Holzer, M., Oman, L. D., Li, F., & Polvani, L. M. (2015). Airmass Origin in the Arctic. Part I: Seasonality, Journal of Climate, 28(12), 4997-5014. Retrieved Jan 10, 2023, from https://journals.ametsoc.org/view/journals/clim/28/12/jcli-d-14-00720.1.xmlen_US
dc.identifier.urihttps://doi.org/10.1175/JCLI-D-14-00720.1
dc.identifier.urihttp://hdl.handle.net/11603/26728
dc.language.isoen_USen_US
dc.publisherAMSen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleAirmass Origin in the Arctic. Part I: Seasonalityen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-7928-0775en_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1520-0442-jcli-d-14-00720.1.pdf
Size:
3.77 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.56 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

UMBC GESTAR II