On the Variability of Wind Power Input to the Oceans with a Focus on the Subpolar North Atlantic
Name
Zhai-2013-On the variability o.pdf
Size
1.63 MB
Format
Adobe PDF
Checksum (MD5)
f9e7de468e6ebb8794cdf8b7ed307d5a
Author(s)
Zhai, Xiaoming
Wunsch, Carl Isaac
Date Issued
June 2013
Journal
Journal of Climate
Publisher
American Meteorological Society
Citation
Zhai, Xiaoming, and Carl Wunsch. “On the Variability of Wind Power Input to the Oceans with a Focus on the Subpolar North Atlantic.” J. Climate 26, no. 11 (June 2013): 3892–3903. © 2013 American Meteorological Society
Version
Final published version
Abstract
Variations in power input to the ocean using a recent global “reanalysis” extending back to 1871 show a strong trend in the net power input since then, a trend dominated by the Southern Ocean region. This trend is interpreted as a spurious result of the changing observational system. Focusing therefore on the North Atlantic Ocean, where the database is somewhat more secure, it is found that the input power in the subpolar North Atlantic varies significantly in time, showing a strong relationship to the North Atlantic Oscillation (NAO). During positive NAO index years, power input is greater owing to enhanced synoptic activity. Furthermore, cumulative power input to the subpolar North Atlantic is found to correlate significantly with both the eddy kinetic energy there and the Atlantic multidecadal oscillation (AMO), although the physical mechanism at work remains unclear. The assumption that the changing ocean can be neglected relative to the changing atmosphere in calculating the power input is found to be a usefully accurate approximation over the two decades for which changing ocean state estimates are available. Strong dependence on synoptic weather systems of monthly-mean stress distributions implies that past and future climate simulations must account properly for changes in weather systems, not just the large-scale variations.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1175/JCLI-D-12-00472.1
