Late Eemian warming in the Nordic Seas as seen in proxy data and climate models
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Contrasting ocean changes between the subpolar and polar North Atlantic during the past 135 ka
[1] Variations in the poleward-directed Atlantic heat transfer was investigated over the past 135 ka with special emphasis on the last and present interglacial climate development (Eemian and Holocene). Both interglacials exhibited very similar climatic oscillations during each preceding glacial terminations (deglacial TI and TII). Like TI, also TII has pronounced cold–warm–cold changes akin to...
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The precise reason for the differences and out-of-phase relationship between the abrupt Dansgaard-Oeschger warmings in the Nordic seas and Greenland ice cores and the gradual warmings in the south-central Atlantic and Antarctic ice cores is poorly understood. Termed the bipolar seesaw, the differences are apparently linked to perturbations in the ocean circulation pattern. Here we show that sur...
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The pattern of Global Mean Temperature (GMT) change is calculated by regressing local Surface Air Temperature (SAT) to GMT for an ensemble of CMIP5 models and for observations over the last 132 years. Calculations are based on the historical period and climate change scenarios. As in the observations the warming-pattern contains a warming hole over the subpolar North Atlantic. Using a bivariate...
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North Atlantic sea ice displacements are thought to play an important role in the abrupt Dansgaard-Oeschger (D-O) cycles of the last glacial period. This model study investigates sea ice variability in glacial climates to help provide constraints on its involvement in D-O cycles. Sea ice variability in a coupled climate model simulation of the Last Glacial Maximum (21 ka) is concentrated in the...
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تاریخ انتشار 2011