Ocean Surface Temperature Response to Atmosphere-Ocean Interaction of the MJO
2011
Zappa, Christopher J
The Madden-Julian Oscillation (MJO) is an intraseasonal oscillation which is most closely identified with the tropical Indian and Pacific Oceans, characterized by an eastward progression of a large (2000 km) pattern, extending from the equator into the adjacent subtropical belts, with enhanced and suppressed rainfall. In the context of this DRI, understanding the complex processes involved in locations such as the MJO as it passes over the eastern Indian Ocean are necessary steps for evaluating the modulation of SST and atmosphere-ocean feedbacks, for validating ocean and climate models, and for making prognostic assessments of oceanic circulation. Sea-air exchange displays a clear seasonal cycle, but there are also significant fluctuations at periods less than seasonal, the so-called intraseasonal oscillations. Notably is the Madden-Julian Oscillation (MJO), which is most closely identified with the tropical Indian and Pacific Oceans, though there is a weaker tropical Atlantic presence. The MJO is characterized by an eastward progression of a large (2000 km) pattern, extending from the equator into the adjacent subtropical belts, with enhanced and suppressed rainfall. The wet phase marked by enhanced convection and precipitation is followed by a dry phase where convection is suppressed.
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