Metrics of hurricane-ocean interaction : vertically-integrated or vertically-averaged ocean temperature?
Supplementary material: A collection of Argo data files and a Matlab script used to evaluate Td (3.815Mb)
Supplementary material: A short description of the comparison between 3D-PWP numerical model results and the Td model (84.52Kb)
Supplementary material: A collection of SST images of the Gulf of Mexico during the historic 2005 hurricane season (6.821Mb)
Price, James F.
MetadataShow full item record
The ocean thermal field is often represented in hurricane-ocean interaction by a metric termed upper Ocean Heat Content (OHC), the vertical integral of ocean temperature in excess of 26°C. High values of OHC have proven useful for identifying ocean regions that are especially favorable for hurricane intensification. Nevertheless, it is argued here that a more direct and robust metric of the ocean thermal field may be afforded by a vertical average of temperature. In the simplest version, dubbed T100, the averaging is from the surface to 100 m, a typical depth of vertical mixing by a category 3 hurricane. OHC and T100 are well correlated over the deep open ocean in the high range of OHC, ≥75 kJ cm−2. They are poorly correlated in the low range of OHC, ≤50 kJ cm−2, in part because OHC is degenerate when evaluated on cool ocean regions, ≤26°C. OHC and T100 can be qualitatively different also over shallow continental shelves: OHC will generally indicate comparatively low values regardless of the ocean temperature, while T100 will take on high values over a shelf that is warm and upwelling neutral or negative. In so far as the ocean thermal field alone is concerned, these warm, shallow continental shelves would appear to be as favorable for hurricane intensification as are warm, deep ocean regions.
© 2009 The Author. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Ocean Science 5 (2009): 351-368, doi:10.5194/os-5-351-2009
Suggested CitationOcean Science 5 (2009): 351-368
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Liang, Xinfeng; Spall, Michael A.; Wunsch, Carl (John Wiley & Sons, 2017-10-27)Estimates of the global ocean vertical velocities (Eulerian, eddy-induced, and residual) from a dynamically consistent and data-constrained ocean state estimate are presented and analyzed. Conventional patterns of vertical ...
A test of basin-scale acoustic thermometry using a large-aperture vertical array at 3250-km range in the eastern North Pacific Ocean Worcester, Peter F.; Cornuelle, Bruce D.; Dzieciuch, Matthew A.; Munk, Walter H.; Howe, Bruce M.; Mercer, James A.; Spindel, Robert C.; Colosi, John A.; Metzger, Kurt; Birdsall, Theodore G.; Baggeroer, Arthur B. (Acoustical Society of America, 1999-06)Broadband acoustic signals were transmitted during November 1994 from a 75-Hz source suspended near the depth of the sound-channel axis to a 700-m long vertical receiving array approximately 3250 km distant in the eastern ...
Whitehead, John A.; Wang, Wei (American Meteorological Society, 2008-05)A model of deep ocean circulation driven by turbulent mixing is produced in a long, rectangular laboratory tank. The salinity difference is substituted for the thermal difference between tropical and polar regions. Freshwater ...