Evidence from Lake Lisan of solar influence on decadal- to centennial-scale climate variability during marine oxygen isotope stage 2
Evidence from Lake Lisan of solar influence on decadal- to centennial-scale climate variability during marine oxygen isotope stage 2
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来自利桑湖的证据表明太阳对海洋氧同位素第二阶段十年至百年尺度气候变化的影响
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发表时间：
2004
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影响因子：
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通讯作者：
M. Stein
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作者：
Sushma Prasad;H. Vos;J. Negendank;N. Waldmann;S. Goldstein;M. Stein
冰河期短期气候变化的记录受到过时高分辨率档案的限制。在这里，我们根据死海裂谷利桑湖的变化湖沉积物重建了大约 100 年的古气候。 26.2–17.7（日历）ka。该年龄是基于以辐射日期为基础的浮动年表。我们的重建表明，小型冰筏事件（a、b、c 和 d）以及北大西洋的海因里希事件与东地中海干旱区间有关。对季节性亚层的研究提供了一些额外的十年至百年规模干旱事件的证据，这些事件与高纬度地区较低的气温有关。频域分析表明存在以 1500 年、500 年、192 年、139 年、90 年和 50-60 年为中心的周期性，表明太阳对气候的强迫。
Documentation of short-term climate variability during the glacial period has been limited by the availability of well-dated high-resolution archives. Here we present a paleoclimate reconstruction from varved lacustrine sediments of Lake Lisan, Dead Sea Rift, for ca. 26.2–17.7 (calendar) ka. The age is based on a floating varve chronology anchored to radiometric dates. Our reconstruction indicates that small ice-rafting events (a, b, c, and d), as well as Heinrich events in the North Atlantic, are associated with the Eastern Mediterranean arid intervals. Study of seasonal sublaminae yields evidence of several additional decadal- to century-scale arid events that correlate with cooler temperatures at higher latitudes. Analyses in the frequency domain indicate the presence of periodicities centered at 1500 yr, 500 yr, 192 yr, 139 yr, 90 yr, and 50–60 yr, suggesting a solar forcing on climate.