Decadal change in the relationship between the oceanic entrainment temperature and thermocline depth in the far western tropical Pacific

Details Decadal change in the relationship between the oceanic entrainment temperature and thermocline depth in the far western tropical Pacific Decadal change in the relationship between the oceanic entrainment temperature and thermocline depth in the far western tropical Pacific

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3423612z&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 23, CiteID L23612

Other

7

Oceanography: Physical: Decadal Ocean Variability (1616, 1635, 3305, 4215), Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: Physical: Enso (4922), Oceanography: Physical: Upper Ocean And Mixed Layer Processes, Geographic Location: Pacific Ocean

Scientific paper

The interaction between the thermocline and mixed layer is a key process important to the El Niño-Southern Oscillation (ENSO) in the tropical Pacific climate system. Decadal changes in the relationships between the depth of 20°C isotherm (D20C) and the temperature of subsurface water entrained into the mixed layer (Te) are analyzed using observed temperature data during the periods 1955-2003 in association with the 1976-77 climate shift. The thermocline in the western tropical Pacific is anomalously deep before the shift, but shallow after the shift. It is found that the relationship has undergone decadal change in the far western tropical Pacific (west of 160°E). The effects of the decadal changes in the D20C-Te relationships on ENSO properties are further examined using an intermediate coupled model (ICM). It is demonstrated that ENSO properties are sensitive to the decadal changes in the D20C-Te relationship in the far western tropical Pacific.

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