نتایج جستجو برای: glacial period

تعداد نتایج: 500154  

2003
Federica Tamburini Karl B. Föllmi Thierry Adatte Stefano M. Bernasconi Philipp Steinmann

[1] The northern region of the Arabian Sea is one of the biologically most fertile regions of the world oceans, with present productivity rates varying between 150 and 2500 mgC/m day [Madhupratap et al., 1996]. This is related to the influence of the southwesterly summer monsoon which causes vigorous upwelling along the Oman margin. Upwelling ceases during northeasterly winter monsoon activity;...

2017
Johann P Klages Gerhard Kuhn Claus-Dieter Hillenbrand James A Smith Alastair G C Graham Frank O Nitsche Thomas Frederichs Patrycja E Jernas Karsten Gohl Lukas Wacker

Precise knowledge about the extent of the West Antarctic Ice Sheet (WAIS) at the Last Glacial Maximum (LGM; c. 26.5-19 cal. ka BP) is important in order to 1) improve paleo-ice sheet reconstructions, 2) provide a robust empirical framework for calibrating paleo-ice sheet models, and 3) locate potential shelf refugia for Antarctic benthos during the last glacial period. However, reliable reconst...

2009
Peter D. Ditlevsen

These changes in the forcing are to small to explain the observed climate variations as simple linear responses. Non-linear amplifications are necessary to account for the glacial cycles. Here an empirical model of the non-linear response is presented. From the model it is possible to assess the role of stochas-tic noise in comparison to the deterministic orbital forcing of the ice ages. The mo...

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