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<p>Inter-basin interactions are a pivotal driver of the global climate system. By employing the inter-basin teleconnectivity (IBT) analysis, this study systematically investigates the dominant simultaneous inter-basin linkages across the Pacific, Atlantic, and Indian Oceans in the annual mean sea surface temperature field. We identify 11 distinct inter-basin teleconnections (IBTs), which include two previously recognized patterns, i.e. the boundary current synchronization (BCS) and South Atlantic-South Indian Ocean synchronization (SASI), along with nine new potential IBTs. Two of these new IBTs respectively represent the inter-basin linkages of the Pacific Decadal Oscillation (PDO) and Indian Ocean Basin Mode (IOB) with other ocean basins. We mainly analyze the spatiotemporal characteristics of the remaining IBTs, namely the Bay of Bengal-South Atlantic synchronization (BBSA), Northwest Atlantic-Southeast Indian Ocean seesaw (NASI), Caribbean Sea-Southwest Indian Ocean seesaw (CSSI), Southwest Pacific-Southeast America synchronization (SPSA), North Pacific-South Atlantic seesaw (NPSA), North Tropical Indo-Pacific seesaw (NTIP), and Southern Hemispheric Tripole (SHT). The results demonstrate that these IBTs are statistically relatively independent of some known climate modes and exhibit distinct quasi-periodic characteristics on interannual to decadal timescales. These findings enhance our understanding about inter-basin linkages and interactions.</p>

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Inter-basin teleconnections in the annual mean sea surface temperature field

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • Dazhi Zhang,
  • Jianping Li

摘要

Inter-basin interactions are a pivotal driver of the global climate system. By employing the inter-basin teleconnectivity (IBT) analysis, this study systematically investigates the dominant simultaneous inter-basin linkages across the Pacific, Atlantic, and Indian Oceans in the annual mean sea surface temperature field. We identify 11 distinct inter-basin teleconnections (IBTs), which include two previously recognized patterns, i.e. the boundary current synchronization (BCS) and South Atlantic-South Indian Ocean synchronization (SASI), along with nine new potential IBTs. Two of these new IBTs respectively represent the inter-basin linkages of the Pacific Decadal Oscillation (PDO) and Indian Ocean Basin Mode (IOB) with other ocean basins. We mainly analyze the spatiotemporal characteristics of the remaining IBTs, namely the Bay of Bengal-South Atlantic synchronization (BBSA), Northwest Atlantic-Southeast Indian Ocean seesaw (NASI), Caribbean Sea-Southwest Indian Ocean seesaw (CSSI), Southwest Pacific-Southeast America synchronization (SPSA), North Pacific-South Atlantic seesaw (NPSA), North Tropical Indo-Pacific seesaw (NTIP), and Southern Hemispheric Tripole (SHT). The results demonstrate that these IBTs are statistically relatively independent of some known climate modes and exhibit distinct quasi-periodic characteristics on interannual to decadal timescales. These findings enhance our understanding about inter-basin linkages and interactions.