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首页> 外文期刊>Geophysical Research Letters >A 2,326-year tree-ring record of climate variability on the northeastern Qinghai-Tibetan Plateau - art. no. 1739
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A 2,326-year tree-ring record of climate variability on the northeastern Qinghai-Tibetan Plateau - art. no. 1739

机译:青藏高原东北部气候变化的2326年树状记录-艺术。没有。 1739

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摘要

1] High-resolution climate proxy records covering the last two millennia on the Qinghai-Tibetan Plateau are scarce yet essential to evaluation of the patterns, synchroneity and spatial extent of past climatic changes including those in the Medieval Warm Period (MWP) and the Little Ice Age (LIA). Here we present a 2326-year tree-ring chronology of Sabina przewalskii Kom. for Dulan area of northeastern Qinghai-Tibetan Plateau. We find that the annual growth rings mainly reflect variations in regional spring precipitation. The greatest change in spring precipitation during the last two millennia seems to occur in the second half of the 4th century. The North Atlantic MWP was accompanied by notable wet springs in the study region during A. D. 929 - 1031 with the peak occurring around A. D. 974. Three intervals of dry springs occurred in the period of LIA. Our tree-ring data will facilitate intercontinental comparisons of large-scale synoptic climate variability for the last two millennia. [References: 25
机译:1]青藏高原近两千年的高分辨率气候代用记录稀缺,但对于评估过去气候变化的模式,同步性和空间范围(包括中世纪暖期和小气候)的评估至关重要冰河时代(LIA)。在这里,我们介绍了Sabina przewalskii Kom的2326年树年轮年代。青藏高原东北部的都兰地区。我们发现年轮环主要反映了区域春季降水的变化。在过去的两千年中,春季降水的最大变化似乎发生在4世纪下半叶。北大西洋MWP伴随着公元929年至1031年研究区域的显着湿泉,其峰值出现在公元974年左右。LIA时期出现了3次干泉间隔。我们的年轮数据将有助于对过去两千年的大尺度天气变化进行洲际比较。 [参考:25

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