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Detailed Reference Information |
Alford, M.H. (2003). Improved global maps and 54-year history of wind-work on ocean inertial motions. Geophysical Research Letters 30: doi: 10.1029/2002GL016614. issn: 0094-8276. |
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The global distribution and 54-year time dependence of the energy-flux from the wind to near-inertial motions is computed by driving a slab mixed-layer model with NCEP/NCAR Reanalysis winds, improving upon previous estimates <Alford, 2001; Watanabe and Hibiya, 2002>. The slab model is solved spectrally with frequency-dependent damping. The resulting solutions are more physically sensible than the previous, and more skillful at high latitudes, where the inertial frequency approaches the 4¿-daily sampling of the Reanalysis winds. This enables Alford's calculation, whose domain was limited to ¿50¿, to be extended to the poles. The high-latitude reliability is demonstrated by direct comparison with a high-resolution regional model (REMO) in the NE Atlantic. The total power input, 0.47 TW, has increased by 25% since 1948, paralleling observed increases in extratropical cyclone frequency and intensity. If believable, the trend may have important consequences for modulation of the meridional overturning circulation. |
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Abstract |
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Keywords
Oceanography, Physical, Internal and inertial waves, Oceanography, Physical, Air/sea interactions, Oceanography, Physical, Turbulence, diffusion, and mixing processes, Oceanography, General, Climate and interannual variability |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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