Attribution of the summer warming since 1970s in Indian Ocean Basin to the inter-decadal change in the seasonal timing of El Nino decay phase

作者：Li, Qian; Ren, R. -C.^*; Cai, M.; Wu, G. X.

来源：Geophysical Research Letters, 2012, 39: L12702.

DOI：10.1029/2012GL052150

• SEA-SURFACE TEMPERATURE
• INDO-WESTERN PACIFIC
• ATMOSPHERIC BRIDGE
• TROPICAL PACIFIC
• SOUTHERN-OSCILLATION
• ENSO
• VARIABILITY
• SST
• FREQUENCY
• CLIMATE

This paper reports that, on top of the general warming trend in the Indian Ocean Basin (IOB) SST in the past 140 years, there exists an additional multidecadal-scale warming in the period from late 1940s to early 2000s, and this warming in IOB is particularly stronger in summer than in other seasons. Our analysis indicates that, the seasonal timing of the decay phase of El Nino events during this period has been delayed from spring to early summer since 1970s, while the seasonal timing of La Nina decay phase remains in spring season. The direct effect of the later decay of El Nino events is the lengthening of the delayed warming effect of El Nino on IOB SST into summer, attributing to the stronger IOB warming in summer from the late 1940s to the early 2000s. Citation: Li, Q., R.-C. Ren, M. Cai, and G. X. Wu (2012), Attribution of the summer warming since 1970s in Indian Ocean Basin to the inter-decadal change in the seasonal timing of El Nino decay phase, Geophys. Res. Lett., 39, L12702, doi:10.1029/2012GL052150.

• 出版日期2012-6-21
• 单位中国科学院大气物理研究所