Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3510706s&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 10, CiteID L10706
Physics
9
Atmospheric Processes: General Circulation (1223), Atmospheric Processes: Synoptic-Scale Meteorology, Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408)
Scientific paper
Anticyclonic Rossby wave breaking (RWB) over a well-defined, limited-area region of the east Pacific leads to the positive polarity of the North Atlantic Oscillation (NAO) by locally piling up wave activity where it may be advected downstream, resulting in increased wave activity flux and anticyclonic RWB over the subtropical Atlantic. A composite time series shows that Pacific RWB occurs several days prior to the Atlantic RWB and the peak of the NAO index. Following Pacific RWB, a channel of increased pseudomomentum flux extends from the Pacific wave breaking region, northeastward toward midlatitudes of eastern North America where pseudomomentum density accumulates for several days prior to moving eastward and leading to anticyclonic RWB over the Atlantic.
Magnusdottir Gudrun
Strong Courtenay
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