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Response of precipitation over Greenland and the adjacent ocean to North Pacific warm spells during Dansgaard–Oeschger stadials (2002)

Kiefer, Thorsten ; Lorenz, Stephan ; Schulz, Michael ; [et al.]

Oxford, UK : Blackwell Science Ltd

Terra nova 14 (2002), S. 0

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ISSN: 1365-3121

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences

Notes: Palaeoceanographic reconstructions from the North Atlantic indicate massive ice breakouts from East Greenland near the onset of cold Dansgaard–Oeschger (D–O) stadials. In contrast to these coolings in the North Atlantic area, a new sea-surface temperature record reveals concomitant warm spells in the northern North Pacific. A sensitivity experiment with an atmospheric general circulation model is used to test the potential impact of sea-surface warmings by 3.5 °C in the North Pacific, on top of otherwise cold stadial climate conditions, on the precipitation regime over the Northern Hemisphere ice sheets. The model predicts a maximum response over East Greenland and the Greenland Sea, where a 40% increase in net annual snow accumulation occurs. This remote effect of North Pacific warm spells on the East Greenland snow-accumulation rate may play an important role in generating D–O cycles by rebuilding the ice lost during ice breakouts. In addition, the increased precipitation over the Greenland Sea may help to sustain the D–O stadial climate state.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1365-3121.2002.00420.x

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Sand deserts during glacial maximum and climatic optimum (1978)

SARNTHEIN, MICHAEL

[s.l.] : Nature Publishing Group

Nature 272 (1978), S. 43-46

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] Climatic conditions are largely characterised by temperature and wetness3. Temperature distribution on the Ice-Age Earth has been extensively studied by the CLIMAP group4"6, and their data base was used in numerical modelling by Manabe and Hahn7, who also included the distribution of sea-surface ...