Millennial meridional dynamics of the Indo-Pacific Warm Pool during the last termination

L. Lo, C. C. Shen, K. Y. Wei, G. S. Burr, H. S. Mii, M. T. Chen, S. Y. Lee, M. C. Tsai

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


To develop an in-depth understanding of the natural dynamics of the Indo-Pacific Warm Pool (IPWP) during the last deglaciation, stacked north- (N-) and south-IPWP (S-IPWP) thermal and hydrological records over the past 23-10.5 ka were built using planktonic foraminiferal geochemistry data from a new core, MD05-2925 (9.3° S, 151.5° E water depth 1661 m) in the Solomon Sea and eleven previous sites. Ice-volume-corrected seawater δ18O (δ18OSW-IVC) stacks show that S-IPWP δ18OSW-IVC values are indistinguishable from their northern counterparts through glacial time. The N-IPWP SST (sea surface temperature) stacked record features an increasing trend of 0.5 °C kag-1 since 18 ka. Its S-IPWP counterpart shows an earlier onset of temperature increase at 19 ka and a strong teleconnection to high-latitude climate in the Southern Hemisphere. Meridional SST gradients between the N- and S-IPWP were 1-1.5 °C during the Bølling/Allerød period and 1 °C during both Heinrich event 1 and the Younger Dryas, due to a warmer S-IPWP. A warm S-IPWP during the cold events could weaken the southern hemispheric branch of the Hadley cell and reduce precipitation in the Asian monsoon region.

Original languageEnglish
Pages (from-to)2253-2261
Number of pages9
JournalClimate of the Past
Issue number6
Publication statusPublished - 2014 Dec 23

ASJC Scopus subject areas

  • Global and Planetary Change
  • Stratigraphy
  • Palaeontology


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