2 Evidence for a widespread climatic anomaly at around 3 9.2 ka before present
7 [1] The 8.2 ka event was triggered by a meltwater pulse (MWP) into the North Atlantic and resultant reduction 8 of the thermohaline circulation (THC). This event was preceded by a series of at least 14 MWPs; their impact on 9 early Holocene climate has remained almost unknown. A set of high-qualit...
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.1508 http://www.geo.umass.edu/faculty/bradley/fleitmann2008.pdf |
| Summary: | 7 [1] The 8.2 ka event was triggered by a meltwater pulse (MWP) into the North Atlantic and resultant reduction 8 of the thermohaline circulation (THC). This event was preceded by a series of at least 14 MWPs; their impact on 9 early Holocene climate has remained almost unknown. A set of high-quality paleoclimate records from across 10 the Northern Hemisphere show evidence for a widespread and significant climatic anomaly at 9.2 ka B.P. This 11 event has climatic anomaly patterns very similar to the 8.2 ka B.P. event, cooling occurred at high latitudes and 12 midlatitudes and drying took place in the northern tropics, and is concurrent with a MWP of considerable 13 volume (8100 km3). As the 9.2 ka MWP occurs at a time of enhanced baseline freshwater flow into the North 14 Atlantic, this MWP may have been, despite its relatively small volume, sufficient to weaken THC and to induce 15 the observed climate anomaly pattern. |
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