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Evolution of IOD-ENSO relationship at multiple time scales
Sang, Yan-Fang; Singh, Vijay P.; Xu, Kang4
AbstractBoth El Nino-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) are important indicators of the potential impact of climate at the global scale. The IOD-ENSO relationship at different timescales is temporally non-uniform, which is important to understand in order to evaluate its socioeconomic impacts. Here, we developed and applied a wavelet cross-correlation analysis approach for investigating the evolution of the IOD-ENSO relationship over a 150-year period. We found that the IOD-ENSO relationship was statistically significant at the dominant timescales of 1.5, 3, and 24year, with the correlation degree varying with time. The hysteresis effect between IOD and ENSO and the evolution of their relationship obviously differ at the three dominant timescales. The positive (negative) IOD and El Nino (La Nina) events were mainly determined by the variability of IOD and ENSO at the timescale <3year. Strong positive IOD events in the September-October-November period would more likely be related to El Nino events 2months later and La Nina events 14months later, but negative IOD events would rarely co-occur with El Nino or La Nina events. The result achieved in this study can serve as a useful guide for the long-term forecast of IOD and ENSO.
KeywordCorrelation analysis Wavelet analysis Detection and attribution El Nino-Southern Oscillation Indian Ocean dipole Climate change
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA
3.Singh, Vijay P.] Texas A&M Univ, Dept Biol & Agr Engn, 321 Scoates Hall,2117 TAMU, College Stn, TX 77843 USA
4.Singh, Vijay P.] Texas A&M Univ, Zachry Dept Civil Engn, 321 Scoates Hall,2117 TAMU, College Stn, TX 77843 USA
5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Sang, Yan-Fang,Singh, Vijay P.,Xu, Kang. Evolution of IOD-ENSO relationship at multiple time scales[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2019,136(2019-03-04):1303, 1309.
APA Sang, Yan-Fang,Singh, Vijay P.,&Xu, Kang.(2019).Evolution of IOD-ENSO relationship at multiple time scales.THEORETICAL AND APPLIED CLIMATOLOGY,136(2019-03-04),1303.
MLA Sang, Yan-Fang,et al."Evolution of IOD-ENSO relationship at multiple time scales".THEORETICAL AND APPLIED CLIMATOLOGY 136.2019-03-04(2019):1303.
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