Enhanced circulation during a warm period

Ana Christina Ravelo, Dyke H. Andreasen

doi:10.1029/1999gl007000

Enhanced circulation during a warm period

DOI Web Site Web Site 被引用文献8件

書誌事項

公開日: 2000-04

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/1999gl007000

公開者: American Geophysical Union (AGU)

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説明

<jats:p>The Early Pliocene is the most recent interval in which equilibrium oceanic conditions can be studied in the context of global warmth relative to today. To characterize thermohaline circulation during this warm period (4.4–3.1 Ma) we combined new benthic foraminiferal isotopic data from the southeast Atlantic with published data, and reconstructed Pacific and Atlantic Ocean nutrient distributions. The data indicate enhanced ventilation of the deep Atlantic and intermediate Pacific during the Early Pliocene. Enhanced ventilation implies that delivery of surface water to high latitudes in western boundary currents of North Pacific and Atlantic subtropical gyres was probably also enhanced. Future modeling of this warm period needs to reconcile reduced meridional surface temperature gradients with enhanced subtropical gyre and thermohaline circulation.</jats:p>