A 200 year mid-European air temperature record preserved in lake sediments: An extension of the δ18Op-air temperature relation into the past
A 200 year mid-European air temperature record preserved in lake sediments: An extension of the δ18Op-air temperature relation into the past
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DOI：
10.1016/s0016-7037(96)00230-x
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发表时间：
1996-11
影响因子：
5
通讯作者：
U. Grafenstein;H. Erlenkeuser;J. Müller;P. Trimborn;J. Alefs
中科院分区：
文献类型：
--
作者：
U. Grafenstein;H. Erlenkeuser;J. Müller;P. Trimborn;J. Alefs
通过分析沉积物岩芯中介形虫壳的氧同位素比，建立了德国南部阿默湖水氧同位素比的详细历史，在过去的两个世纪中，在三至五年的分辨率。经验分析和同位素水文模拟表明，湖水的氧同位素组成主要受当地降水的同位素组成控制。在过去的200年里，湖泊的同位素记录与位于湖泊集水区内的霍恩佩森贝格的气温记录密切相关。因此，中欧降水和气温之间的关系，记录在过去的20年，可以延长到更长的时间和更大的温度范围。研究结果进一步支持了Ammersee沉积物中介形虫δ18O作为年平均气温定量代表的有效性，可能可以追溯到末次冰期。
A detailed history of the water oxygen isotope ratios of Lake Ammersee, southern Germany, was established for the last two centuries by analyzing oxygen isotope ratios of ostracod shells from a sediment core in a three- to five-year resolution. Empirical analysis and modelling of the isotope hydrology of the lake show that the oxygen isotopic composition of the lake water is mainly controlled by the isotopic composition of local precipitation. For the last 200 years, the lake isotope record is strongly correlated to the air temperature record from Hohenpeißenberg, situated within the lake's catchment area. Thus, the mid-European relation between18O in precipitation and air temperature, documented for the last 20 years, can be extended over a longer time and a larger temperature range. The results provide further support for the validity of ostracod δ18O from Ammersee sediments as a quantitative proxy for mean annual air temperature, probably extending back to the last glaciation.