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Publication . Conference object . Article . Other literature type . 2007

Dominant Northern Hemisphere climate control over millennial-scale glacial sea-level variability

Helge W Arz; Frank Lamy; Andrey Ganopolski; Norbert R. Nowaczyk; Jürgen Pätzold;
Open Access
Published: 01 Feb 2007
Abstract

Abstract Based on a radiocarbon and paleomagnetically dated sediment record from the northern Red Sea and the exceptional sensitivity of the regional changes in the oxygen isotope composition of sea water to the sea-level-dependent water exchange with the Indian Ocean, we provide a new global sea-level reconstruction spanning the last glacial period. The sea-level record has been extracted from the temperature-corrected benthic stable oxygen isotopes using coral-based sea-level data as constraints for the sea-level/oxygen isotope relationship. Although, the general features of this millennial-scale sea-level records have strong similarities to the rather symmetric and gradual Southern Hemisphere climate patterns, we observe, in constrast to previous findings, pronounced sea level rises of up to 25 m to generally correspond with Northern Hemisphere warmings as recorded in Greenland ice-core interstadial intervals whereas sea-level lowstands mostly occur during cold phases. Corroborated by CLIMBER-2 model results, the close connection of millennial-scale sea-level changes to Northern Hemisphere temperature variations indicates a primary climatic control on the mass balance of the major Northern Hemisphere ice sheets and does not require a considerable Antarctic contribution.

Subjects by Vocabulary

Microsoft Academic Graph classification: Ice sheet geography.geographical_feature_category geography Sea level Isotopes of oxygen Geology Glacial period Radiocarbon dating law.invention law Oceanography Southern Hemisphere Stadial Northern Hemisphere

Subjects

550 - Earth sciences, Geology, Archeology, Ecology, Evolution, Behavior and Systematics, Global and Planetary Change

52 references, page 1 of 6

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