| Abstract: | Recent studies find global climate variability in the upper ocean and lower atmosphere during the twentieth century dominated by quasi-biennial, interannual, quasi-decadal and interdecadal signals. The quasi-decadal signal in upper ocean temperature undergoes global warming/cooling of ???0.1??C, similar to that occuring with the interannual signal (i.e., El Nin??o-Southern Oscillation), both signals dominated by global warming/cooling in the tropics. From the National Centers for Environmental Prediction troposphere reanalysis and Scripps Institution of Oceanography upper ocean temperature reanalysis we examine the quasi-decadal global tropical diabetic heat storage (DHS) budget from 1975 to 2000. We find the anomalous DHS warming tendency of 0.3-0.9 W m-2 driven principally by a downward global tropical latent-plus-sensible heat flux anomaly into the ocean, overwhelming the tendency by weaker upward shortwave-minus-longwave heat flux anomaly to drive an anomalous DHS cooling tendency. During the peak quasi-decadal warming the estimated dissipation of DHS anomaly of 0.2-0.5 W m-2 into the deep ocean and a similar loss to the overlying atmosphere through air-sea heat flux anomaly are balanced by a decrease in the net poleward Ekman heat advection out of the tropics of 0.4-0.7 W m-2. This scenario is nearly the opposite of that accounting for global tropical warming during the El Nin??o. These diagnostics confirm that even though the global quasi-decadal signal is phase-locked to the 11-year signal in the Sun‘s surface radiative forcing of ???0.1 W m-2, the anomalous global tropical DHS tendency cannot be driven by it directly. |
| Genre: | Article |
| ProdID: | 70025166 |
| Citation Author: | White, W. B.; Dettinger, M. D.; Cayan, D. R. |
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| Citation End Page: | 1 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research C: Oceans |
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| Citation Number Of Pages: | -2 |
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| Citation Search Results Text: | Sources of global warming of the upper ocean on decadal period scales; 2003; Article; Journal; Journal of Geophysical Research C: Oceans; White, W. B.; Dettinger, M. D.; Cayan, D. R. |
| Citation Start Page: | 4 |
| Citation Volume: | 108 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Sources of global warming of the upper ocean on decadal period scales; 2003; Article; Journal; Journal of Geophysical Research C: Oceans; White, W. B.; Dettinger, M. D.; Cayan, D. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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