Variability in AIRS-retrieved cloud amount and thermodynamic phase over west versus east Antarctica influenced by the SAM

TitleVariability in AIRS-retrieved cloud amount and thermodynamic phase over west versus east Antarctica influenced by the SAM
Publication TypeJournal Article
Year of Publication2015
AuthorsLubin D., Kahn B.H, Lazzara M.A, Rowe P., Walden V.
JournalGeophysical Research Letters
Volume42
Pagination1259-1267
Date Published2015/02
Type of ArticleArticle
ISBN Number0094-8276
Accession NumberWOS:000351851900037
Keywordsannular mode; climate; refractive-indexes; surface; system; temperature; water
Abstract

In a sample of summertime cloud retrievals from the NASA Atmospheric Infrared Sounder (AIRS), a positive Southern Annular Mode (SAM) index polarity is associated with greater cloud frequency and larger effective cloud fraction over West Antarctica compared with a negative SAM index polarity. The opposite result appears over the high East Antarctic Plateau. Comparing AIRS-retrieved cloud fraction with Antarctic Automatic Weather Station 2 m air temperature data, a positive and significant correlation is found over most of West Antarctica, signifying a longwave heating effect of clouds. Over East Antarctica correlations between Sun elevation and 2 m air temperature are strongest, consistent with lower cloud amount.

DOI10.1002/2014gl062285
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