The Little Ice Age and Medieval warm period in the Sargasso Sea
The Little Ice Age and Medieval warm period in the Sargasso Sea
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DOI：
10.1126/science.274.5292.1504
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发表时间：
1996-11-29
期刊：
影响因子：
56.9
通讯作者：
Keigwin, LD
中科院分区：
文献类型：
--
作者：
Keigwin, LD
海表温度（SST），盐度和陆源物质通量在更新世北大西洋的千年时间尺度上振荡，但很少有记录的全新世变化。由于沉积物的高速率积累，全新世振荡在北方马尾藻海有很好的记录。放射性碳年代测定的盒芯结果显示，SST与400年前（小冰期）和1700年前的今天相比，温度降低了1摄氏度，与1000年前（中世纪温暖期）的今天相比，温度升高了1摄氏度。因此，至少小冰河时期以来的部分变暖似乎是自然振荡的一部分。
Sea surface temperature (SST), salinity, and flux of terrigenous material oscillated on millennial time scales in the Pleistocene North Atlantic, but there are few records of Holocene variability. Because of high rates of sediment accumulation, Holocene oscillations are well documented in the northern Sargasso Sea. Results from a radiocarbondated box core show that SST was similar to 1 degrees C cooler than today similar to 400 years ago (the Little Ice Age) and 1700 years ago, and similar to 1 degrees C warmer than today 1000 years ago (the Medieval Warm Period). Thus, at least some of the warming since the Little Ice Age appears to be part of a natural oscillation.