| Autor: |
H. E. Garcia, S. Levitus, Ricardo A Locarnini, John I. Antonov, Timothy P. Boyer |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Geophysical Research Letters. 32 |
| ISSN: |
0094-8276 |
| Popis: |
step-like shift during the late-1970s from generally negative to generally positive values. This shift coincided with the change in polarity of the Pacific Decadal Oscillation (PDO). Stephens et al. [2001] observed a similar shift for 0–125 m heat content fields. Another area exhibiting substantial change is the Gulf Stream region which exhibits warming associated with this EOF. The second and third EOFs are also associated with gyre and basin-scale patterns of variability of the Pacific Ocean. The second EOF is characterized by a region of negative polarity extending westward from the eastern boundary of the tropical Pacific Ocean and by a region of positive polarity extending northeastward from the western boundary of the tropical Pacific Ocean. The time variability of this pattern is characterized by a positive linear trend throughout the period. The third EOF is characterized by a transpacific region of negative polarity south of 5N in the Pacific, by positive polarity in the 5–15N latitude band and along 30N in the western Pacific, and by a region of negative polarity extending eastward along the Kuroshio and then curving south and west. The change in polarity along 5N is striking. Meinen and McPhaden [2000] found a similar feature in an EOF analysis of the depth of the 20C isotherm for 1980–1999. They associated this feature |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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