Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29t..52k&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 20, pp. 52-1, CiteID 1991, DOI 10.1029/2002GL015595
Physics
5
Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504), Oceanography: Physical: Air/Sea Interactions (0312), Oceanography: Physical: Sea Level Variations, Oceanography: General: Equatorial Oceanography, Oceanography: General: Diurnal, Seasonal, And Annual Cycles
Scientific paper
Westward propagating waves in the North Pacific Ocean from 10-16°N are overwhelmed by a zonally coherent response at the annual period, as observed in sea surface height (SSH) anomalies from the TOPEX/POSEIDON altimeter. SSH from a simple model of wind-forced Rossby waves and from seasonal heating are compared with observed SSH to understand the processes responsible for the observed signal. The seasonal heating cycle is out-of-phase and too weak to explain the SSH. The oceanic response to wind stress curl forcing more closely resembles the observations, but the response to NCEP Reanalysis winds does not show a strong annual cycle. Wind stress curl from the QuikSCAT/SeaWinds scatterometer has a strong and zonally coherent annual cycle that produces a corresonding strong annual signal in SSH. The model forced by scatterometer winds demonstrates that the response to Ekman pumping is the source of the strong annual cycle in the SSH.
Kelly Kathryn A.
Thompson Lu Anne
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