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Circumpolar Circulation Patterns Over the Northern Hemisphere Oceans in Late Winter, 1949-2002.To assess interannual changes in ocean-to-land advection, we extract zonal winds for February and March, 1949-2002, from NCEP/NCAR Reanalysis. Winds are analyzed at pairs of locations (55 deg N and 35 deg N) in the N. Pacific (15 deg W), N. Atlantic (30 deg W) and Baltic/Mediterranean (30 deg E). The monthly means at the northern and southern sites are negatively correlated. For N. Pacific, winds at 55 deg N show negative trends at all levels (magnitude increasing with altitude), versus positive at 35 deg N. An opposite scenario is observed over N. Atlantic, positive (negative) trends at 55 deg N (35 deg N) and similarly, but weaker, over the Baltic/Mediterranean. The geographic variability of trends is attributed to displacement of the polar vortex wave pattern. Increasing storm strength/frequency over N. Hemisphere oceans is inherently related to the strong positive trends in wind speed and vertical shear.
Document ID
20030025679
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Otterman, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Starr, D. OC.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Atlas, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Jusem, J. C.
(Science Applications International Corp. Greenbelt, MD, United States)
Saaroni, H.
(Tel-Aviv Univ., Ramat-Aviv Tel-Aviv, Israel)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Meteorology And Climatology
Distribution Limits
Public
Copyright
Public Use Permitted.
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