IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Print this page

The Eurasian ice sheet reinforces the East Asian summer monsoon during the interglacial 500 000 years ago
Yin, Q.; Berger, A.; Driesschaert, E.; Goosse, H.; Loutre, M.-F.; Crucifix, M. (2008). The Eurasian ice sheet reinforces the East Asian summer monsoon during the interglacial 500 000 years ago. Clim. Past 4(2): 79-90
In: Climate of the Past. Copernicus: Göttingen. ISSN 1814-9324; e-ISSN 1814-9332, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 

Abstract
    Deep-sea and ice-core records show that interglacial periods were overall less "warm" before about 420 000 years ago than after, with relatively higher ice volume and lower greenhouse gases concentration. This is particularly the case for the interglacial Marine Isotope Stage 13 which occurred about 500 000 years ago. However, by contrast, the loess and other proxy records from China suggest an exceptionally active East Asian summer monsoon during this interglacial. A three-dimension Earth system Model of Intermediate complexity was used to understand this seeming paradox. The astronomical forcing and the remnant ice sheets present in Eurasia and North America were taken into account in a series of sensitivity experiments. Expectedly, the seasonal contrast is larger and the East Asian summer monsoon is reinforced compared to Pre-Industrial time when Northern Hemisphere summer is at perihelion. Surprisingly, the presence of the Eurasian ice sheet was found to reinforce monsoon, too, through a south-eastwards perturbation planetary wave. The trajectory of this wave is influenced by the Tibetan plateau.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors