ON THE INSTABILITY OF TROPICAL WESTERN PACIFIC WARM POOL DURING THE BOREAL WINTER AND SPRING

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A source of instability in the western Pacific warm pool is shown to be due to sea surface elevation variations caused by changes in the zonal sea-surface temperature (SST) gradient and the changes in the Pacific Ocean basin length in relation to the warm pool latitudinal location. The variation of the sea-surface elevation is measured by using the thermocline depth response calculated from a two-layer ocean. The warm pool is shown to be barely at equilibrium during the boreal late winter and early spring by comparing the measured thermocline at 110{degree}W, 0{degree}E with the calculated thermocline depth. Based on this ... continued below

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5 pages

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Barr-Kumarakulasinghe, S. A. March 23, 1998.

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A source of instability in the western Pacific warm pool is shown to be due to sea surface elevation variations caused by changes in the zonal sea-surface temperature (SST) gradient and the changes in the Pacific Ocean basin length in relation to the warm pool latitudinal location. The variation of the sea-surface elevation is measured by using the thermocline depth response calculated from a two-layer ocean. The warm pool is shown to be barely at equilibrium during the boreal late winter and early spring by comparing the measured thermocline at 110{degree}W, 0{degree}E with the calculated thermocline depth. Based on this analysis, a failure or reversal of the climatological zonal winds are apparently not a necessary precursor for the instability of the warm pool and initiation of a warm event. A warm event can be initiated by an increase in the size of the warm pool and/or an increase in zonal SST differences during the boreal/winter spring. This mechanism could be an alternate mechanism for El-Nino Southern Oscillation (ENSO) dynamics to that postulated by Bjeknes (1969).

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5 pages

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OSTI as DE00755023

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  • 8TH ANNUAL ATMOSPHERIC RADIATION MEASUREMENT (ARM) PROGRAM SCIENCE TEAM MEETING, TUCSON, AZ (US), 03/23/1998--03/27/1998

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  • Report No.: BNL--66878
  • Report No.: KP120103
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 755023
  • Archival Resource Key: ark:/67531/metadc703187

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  • March 23, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 9, 2015, 10:10 p.m.

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Barr-Kumarakulasinghe, S. A. ON THE INSTABILITY OF TROPICAL WESTERN PACIFIC WARM POOL DURING THE BOREAL WINTER AND SPRING, article, March 23, 1998; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc703187/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.