Atmosphere–Warm Ocean Interaction and Its Impacts on Asian–Australian Monsoon Variation*

Asian-Australian monsoon (A-AM) anomalies depend strongly on phases of El Nin o (La Nin a). Based on this distinctive feature, a method of extended singular value decomposition analysis was developed to analyze the changing characteristics of A-AM anomalies during El Nin o (La Nin a) from its development to decay. Two off-equatorial surface anticyclones dominate the A-AM anomalies during an El Nin oone over the south Indian Ocean (SIO) and the other over the western North Pacific (WNP). The SIO anticyclone, which affects climate conditions over the Indian Ocean, eastern Africa, and India, originates during the summer of a growing El Nin o, rapidly reaches its peak intensity in fall, and decays when El Nin o…

• NS
  National Science Foundation
• NO
  National Oceanic and Atmospheric Administration