Increasing frequencies of warm and humid air masses over the conterminous United States from 1948 to 2005

Knight, David B., Davis, Robert E., Sheridan, Scott C., Hondula, David M., Sitka, Luke J., Deaton, Michael, Lee, Temple R., Gawtry, Stephen D., Stenger, Philip J., Mazzei, Francesco and Kenny, Barrett P. (2008) Increasing frequencies of warm and humid air masses over the conterminous United States from 1948 to 2005. Geophysical Research Letters, 35 10: L10702.1-L10702.5. doi:10.1029/2008GL033697


Author Knight, David B.
Davis, Robert E.
Sheridan, Scott C.
Hondula, David M.
Sitka, Luke J.
Deaton, Michael
Lee, Temple R.
Gawtry, Stephen D.
Stenger, Philip J.
Mazzei, Francesco
Kenny, Barrett P.
Title Increasing frequencies of warm and humid air masses over the conterminous United States from 1948 to 2005
Journal name Geophysical Research Letters   Check publisher's open access policy
ISSN 0094-8276
1944-8007
Publication date 2008-05
Sub-type Article (original research)
DOI 10.1029/2008GL033697
Volume 35
Issue 10
Start page L10702.1
End page L10702.5
Total pages 5
Place of publication Washington, DC, United States
Publisher American Geophysical Union
Language eng
Abstract Time series of individual climate variables, such as air temperature and precipitation, have been thoroughly examined to evaluate climate change, but few studies have evaluated how air masses have varied over time. We use the Spatial Synoptic Classification air mass approach to classify multivariate meteorological surface variables into discrete groups and examine trends in air mass frequencies over the period 1948-2005 for the continental United States. We observe increases in warm, moist air masses at the expense of cold, dry air masses, consistent with expectations in an atmosphere with increasing greenhouse gas concentrations. Temporal variations in the North Atlantic Oscillation, Pacific/North American teleconnection pattern, Arctic Oscillation, and El Niño-Southern Oscillation partially explain some of these observed trends in winter.
Keyword Climate variables
Air masses
Spatial synoptic classification
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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