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Feedback relations and causal orders between sea surface temperature and convection within the Western Pacific Warm Pool
Author(s) -
Maliekal Jose A.
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl01526
Subject(s) - outgoing longwave radiation , climatology , longwave , convection , sea surface temperature , pacific ocean , environmental science , positive feedback , western hemisphere warm pool , atmospheric sciences , geology , meteorology , radiation , oceanography , geography , physics , engineering , quantum mechanics , electrical engineering
Analysis of time series of standardized anomalies of sea surface temperature and outgoing longwave radiation from the western Pacific warm pool revealed two distinct modes of atmosphere‐ocean interaction. A statistically binding positive feedback relationship between convection and ocean temperature exists over the equatorial region surrounding the international date line. Here, the contemporaneous feedback between these two variables is not statistically significant. A causal order from the ocean temperature to outgoing longwave radiation is detected in a region of the Southwest Pacific, where ocean patches with temperatures greater than or equal to 29.75°C form most frequently. Dynamical implications associated with the aforementioned feedback relationship and causal order are illustrated by estimating the impact of a sudden transient increase in convection on future values of sea surface temperature and vice versa.