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Global warming and mesoscale eddy dy...

Powell, Brian S.

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Global warming and mesoscale eddy dynamics: An oceanic mechanism for dissipation of heat.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Global warming and mesoscale eddy dynamics: An oceanic mechanism for dissipation of heat./
作者:	Powell, Brian S.
面頁冊數:	216 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 0782.
Contained By:	Dissertation Abstracts International66-02B.
標題:	Physical Oceanography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3165818
ISBN:	9780542009136

Global warming and mesoscale eddy dynamics: An oceanic mechanism for dissipation of heat.
Powell, Brian S.

Global warming and mesoscale eddy dynamics: An oceanic mechanism for dissipation of heat. - 216 p.

Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 0782.

Thesis (Ph.D.)--University of Colorado at Boulder, 2005.

Is global warming increasing the amount of kinetic energy in the ocean? Meso-scale eddies dominate the kinetic energy of the oceans, and may be created by heat influenced baroclinic instability processes. Several novel mathematical techniques are developed for analyzing the mesoscale length and temporal periods using over eleven years of satellite altimetry. The first technique produces accurate, low-noise geostrophic currents from sea surface height measurements. Using this technique, a long-term secular trend in global eddy kinetic energy is found. Expanding the technique to two-dimensions, vorticity can be computed using future scanning altimeters. The most powerful new technique is the use of radial basis functions, which provide a continuous and infinitely differentiable function describing the sea surface topography from sparse altimeter samples. Using these functions, several regions of the globe are analyzed using higher-order dimensional fields to understand the processes present in the eddy field. By developing global and regional eddy statistics to understand the global circulation of energy, two hypotheses will be addressed: (1) increased heating of the ocean is generating an expansion of mesoscale eddy activity; and, (2) this eddy energy is the mechanism by which the ocean is dissipating the heat. Evidence is presented to show that baroclinic instabilities may be the generating force for eddies in certain regions along with model data showing increases in heat storage for the same regions.

ISBN: 9780542009136Subjects--Topical Terms:

1019163
Physical Oceanography.

Global warming and mesoscale eddy dynamics: An oceanic mechanism for dissipation of heat.
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520 $a Is global warming increasing the amount of kinetic energy in the ocean? Meso-scale eddies dominate the kinetic energy of the oceans, and may be created by heat influenced baroclinic instability processes. Several novel mathematical techniques are developed for analyzing the mesoscale length and temporal periods using over eleven years of satellite altimetry. The first technique produces accurate, low-noise geostrophic currents from sea surface height measurements. Using this technique, a long-term secular trend in global eddy kinetic energy is found. Expanding the technique to two-dimensions, vorticity can be computed using future scanning altimeters. The most powerful new technique is the use of radial basis functions, which provide a continuous and infinitely differentiable function describing the sea surface topography from sparse altimeter samples. Using these functions, several regions of the globe are analyzed using higher-order dimensional fields to understand the processes present in the eddy field. By developing global and regional eddy statistics to understand the global circulation of energy, two hypotheses will be addressed: (1) increased heating of the ocean is generating an expansion of mesoscale eddy activity; and, (2) this eddy energy is the mechanism by which the ocean is dissipating the heat. Evidence is presented to show that baroclinic instabilities may be the generating force for eddies in certain regions along with model data showing increases in heat storage for the same regions.
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