A 50,000-YEAR RECORD OF CLIMATE OSCILLATIONS FROM FLORIDA AND ITS TEMPORAL CORRELATION WITH THE HEINRICH EVENTS
A 50,000-YEAR RECORD OF CLIMATE OSCILLATIONS FROM FLORIDA AND ITS TEMPORAL CORRELATION WITH THE HEINRICH EVENTS
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DOI：
10.1126/science.261.5118.198
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发表时间：
1993-07-09
期刊：
影响因子：
56.9
通讯作者：
MAASCH, KA
中科院分区：
文献类型：
--
作者：
GRIMM, EC;JACOBSON, GL;MAASCH, KA
佛罗里达杜兰湖（Lake Tulane）50，000年序列中的松（Pinus）花粉振荡表明，在末次冰期循环期间，植被发生了重大变化。丰富的松属种群的出现表明，气候比以栎属（橡树）和豚草属（豚草和沼泽接骨木）为主的中间阶段更加潮湿。松事件似乎是时间相关的北大西洋海因里希事件，这是大规模的，周期性的进展，从东部边缘的劳伦泰德冰盖的冰流。杜兰松和海因里希事件之间可能的联系包括半球冷却，密西西比融水对墨西哥湾海面温度的影响，以及北大西洋温盐环流对墨西哥湾洋流的影响。
Oscillations of Pinus (pine) pollen in a 50,000-year sequence from Lake Tulane, Florida, indicate that there were major vegetation shifts during the last glacial cycle. Episodes of abundant Pinus populations indicate a climate that was more wet than intervening phases dominated by Quercus (oak) and Ambrosia-type (ragweed and marsh-elder). The Pinus episodes seem to be temporally correlated with the North Atlantic Heinrich events, which were massive, periodic advances of ice streams from the eastern margin of the Laurentide Ice Sheet. Possible links between the Tulane Pinus and Heinrich events include hemispheric cooling, the influences of Mississippi meltwater on sea-surface temperatures in the Gulf of Mexico, and the effects of North Atlantic thermohaline circulation on currents in the Gulf.