A 1,000-year, annually-resolved record of hurricane activity from Boston, Massachusetts
A 1,000-year, annually-resolved record of hurricane activity from Boston, Massachusetts
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DOI：
10.1029/2008gl033950
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发表时间：
2008-07-24
影响因子：
5.2
通讯作者：
Francus, Pierre
中科院分区：
文献类型：
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作者：
Besonen, Mark R.;Bradley, Raymond S.;Francus, Pierre
来自下神秘湖（波士顿附近，马萨诸塞州）的年度层状沉积物记录包含了一系列由过去一千年来影响该盆地的强烈洪水事件沉积的异常分级床。从记录的历史部分来看，11个最突出的分级床中有10个与已知的2 - 3级飓风袭击波士顿地区的年份相对应。因此，我们得出结论，分级床代表了与强烈飓风降水和风驱动的植被扰动有关的沉积，这些扰动暴露了新鲜的松散沉积物。飓风信号在频率上显示出强烈的百年尺度变化，在12 - 16世纪期间活动增加，在11世纪和17 - 19世纪期间活动减少。这些频率变化与来自热带北大西洋的其他古气候指标一致，特别是海表温度变化。
The annually-laminated ( i.e., varved) sediment record from the Lower Mystic Lake ( near Boston, MA), contains a series of anomalous graded beds deposited by strong flooding events that have affected the basin over the last millennium. From the historic portion of the record, 10 out of 11 of the most prominent graded beds correspond with years in which category 2 - 3 hurricanes are known to have struck the Boston area. Thus, we conclude that the graded beds represent deposition related to intense hurricane precipitation combined with wind-driven vegetation disturbance that exposes fresh, loose sediment. The hurricane signal shows strong, centennial-scale variations in frequency with a period of increased activity between the 12th - 16th centuries, and decreased activity during the 11th and 17th - 19th centuries. These frequency changes are consistent with other paleoclimate indicators from the tropical North Atlantic, in particular, sea surface temperature variations.