Response of climate to solar forcing recorded in a 6000-yearδ18O time-series of Chinese peat cellulose
Response of climate to solar forcing recorded in a 6000-yearδ18O time-series of Chinese peat cellulose
复制标题
DOI：
10.1191/095968300669856361
复制
发表时间：
2000-01
期刊：
影响因子：
--
通讯作者：
Y. T. Hong;Hongen Jiang;Tung-sheng Liu;L. Zhou;J. Beer;H. D. Li;X. Leng;B. Hong;X. Qin
中科院分区：
文献类型：
--
作者：
Y. T. Hong;Hongen Jiang;Tung-sheng Liu;L. Zhou;J. Beer;H. D. Li;X. Leng;B. Hong;X. Qin
以往的研究表明，植物纤维素的氧同位素比值(δ18O)可以作为过去气候的敏感替代指标，但其应用主要限于树木年轮。本文介绍了中国东北部泥炭植物纤维素的6000年高分辨率δ18O记录。δ18O的变化被解释为反映了区域地表气温的变化。从同位素数据推断的气候事件与考古和历史证据吻合得很好。记录表明，气候事件与过去6000年来以年轮中大气放射性碳为特征的几乎所有太阳活动的表观变化有着惊人的对应关系。对δ18O记录的光谱分析揭示了大约86年、93年、101年、110年、127年、132年、140年、155年、207年、245年、311年、590年、820年和1046年的周期，这与太阳活动中检测到的周期相似。我们认为这些观测进一步证明了太阳活动和气候变化之间在几十年到几个世纪的时间尺度上存在密切关系。我们的研究结果对于区分自然和人为因素对未来气候变化的影响也具有重要意义。
Previous studies have shown that the oxygen isotope ratio (δ18O) of plant cellulose can serve as a sensitive proxy indicator of past climate, but its application has mainly been restricted to tree-rings. Here we present a 6000-year high-resolutionδ18O record of peat plant cellulose from northeastern China. Theδ18O variation is interpreted as reflecting changes in regional surface air temperature. The climate events inferred from the isotope data agree well with archaeological and historic evidence. The record shows a striking corre spondence of climate events to nearly all of the apparent solar activity changes characterized by the atmospheric radiocarbon in tree-rings over the past 6000 years. Spectral analysis of theδ18O record reveals the periodicities of around 86, 93, 101, 110, 127, 132, 140, 155, 207, 245, 311, 590, 820 and 1046 years, which are similar to those detected in the solar excursions. We consider these observations as further evidence for a close relationship between solar activity and climate variations on timescales of decades to centuries. Our results also have implications for distinguishing between natural and anthropogenic contributions to future climate change.