期刊
HOLOCENE
卷 23, 期 7, 页码 1002-1007出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0959683613479679
关键词
El Nino-Southern Oscillation; Holocene; South Pacific; Southern Annular Mode; southern westerly winds; teleconnections
资金
- New Zealand Foundation for Research, Science and Technology [C05X0705, VICX0704, CO1X0702]
- New Zealand Foundation for Research, Science and Technology [C05X0705, VICX0704, CO1X0702]
Intercorrelated terrestrial and marine records from New Zealand, Chile and Argentina provide the first evidence of a coherent pan-Pacific response to the growing influence that El Nino-Southern Oscillation (ENSO) and multicentury variations in the interaction between ENSO and the Southern Annular Mode (SAM) exerted on rainfall in the Southern Hemisphere mid-latitudes during the middle and late Holocene. Rainfall is also strongly influenced by moisture originating from the prevailing southern westerly winds (SWW), and we find that the variations in rainfall forced by the interaction of ENSO and the SAM are superimposed on an underlying long-term trend induced by a temporal strengthening of the westerly circulation. We conclude that the evolution of rainfall across the South Pacific reflects the influence seasonal insolation exerts on: (1) ENSO/SAM interactions; and (2) the strength of the SWW.
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