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Years before present
AntarcƟca
Sea level
Greenland
Simulated T
Fig. 29.7 An overview of the last deglaciation. From top to bottom:
atmospheric CO 2 as measured in air bubbles from Antarctic ice cores;
d
18
O measured in Greenland ice (GRIP members 1993) as a first-order
indicator of local temperature, superimposed with the simulated average
annual temperature in Greenland from the iLOVECLIM model; the
scaling between model and data implies that the sudden increase of
d
18
O at the HE1/B/A limit is 10 °C. The periods corresponding to the
Heinrich 1 event (HE1), Bolling-Allerod (B/A) and the Younger Dryas
(Y/D) are indicated below. It may be noted that there is no abrupt event
in the temperature simulated by the climate model. Sea-level (Peltier
and Fairbanks 2006) (black triangles) in meters relative to the current
sea level, as reconstructed from corals with the abrupt event “Meltwater
Pulse-1A” (MWP-1A) indicated, representing a rise of about 20 m in
*300 years. Isotopic abundance of deuterium in Antarctic ice (Peltier
and Fairbanks 2006) as a first-order indicator of local temperature with
the Antarctic Cold Reversal (ACR) indicated, a cold spell interrupting
the warming of the deglaciation
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