Holocene moisture evolution across the Mongolian Plateau and its surrounding areas: A synthesis of climatic records

Holocene moisture evolution across the Mongolian Plateau and its surrounding areas: A synthesis of climatic records
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蒙古高原及其周边地区全新世水分演变:气候记录综合

DOI:
10.1016/j.earscirev.2013.03.005
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发表时间:
2013-07
影响因子:
12.1
通讯作者:
冯兆东
冯兆东
中科院分区:
地球科学1区
文献类型:
--
作者:
冯兆东

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在回顾26个高标准的全新世气候重建(主要是基于花粉)的基础上,综合了蒙古高原及其周边地区全新世水分演化的时空格局。中国夏季风影响的半干旱带的区域平均湿度历史(即,区域A)的水汽指数曲线与合成的东亚季风强度曲线基本一致,两者都遵循热带西太平洋海温的总体趋势,而热带西太平洋海温又是对北方半球夏季太阳辐射的延迟响应。从冬季风为主的西伯利亚南部,包括贝加尔湖地区和阿尔泰山(即,区域B)在10.6- 9.6卡之间呈现出总体下降趋势。kyr BP,与俄罗斯平原年降水量和暖季气温的变化趋势基本一致。这种一致性可能与全新世北大西洋暖季气温的下降趋势有关。受西风影响的新疆北方地区(即新疆北部)区域平均湿度指数的主要特征是,区域C)自~ 8 cal以来呈持续增加趋势。Kyr BP。新疆北方近8000年来的增湿趋势可能是由于冬季日照增加的趋势以及与之相关的欧洲西北部冷季温度的增加趋势。蒙古高原干旱区干期和暖期的年代学对应关系(即,蒙古国境内的蒙古高原北方和中国境内的蒙古高原南部(D区)支持了中全新世干旱阶段很可能是中全新世暖季高温的结果的观点。
Based on the review of 26 high-standard Holocene climatic reconstructions (mainly pollen-based) from the Mongolian Plateau and its surrounding areas, temporal and spatial patterns of the Holocene moisture evolution are synthesized. The regionally-averaged moisture history from the summer monsoon-influenced semiarid belt in China (i.e., Region A) demonstrates that the moisture index curve is broadly in agreement with the synthesized East Asian Monsoon Strength curve, both following the general trend of the West Tropical Pacific SST that is in turn the delayed response to the northern hemispheric summer solar insolation. The regionally-averaged moisture indices from the winter monsoon-dominated southern Siberia including Lake Baikal area and the Altai Mountains (i.e., Region B) exhibit a general declining trends since 10.6–9.6cal. kyr BP, being largely consistent with the trends of the annual precipitation and the warm-season temperature in the Russian Plain. The consistency might be attributable to the Holocene declining trend of the warm-season temperature in North Atlantic region. The predominant feature of the regionally-averaged moisture index from the westerlies-affected northern Xinjiang (i.e., Region C) is a persistent increasing trend since ~8cal. kyr BP. The wetting trend of northern Xinjiang during the past 8000years might be attributable to the increasing trend of winter insolation and to the associated increasing trend of cold-season temperature in northwestern Europe. The chronological correspondences between dry phases and warm intervals in the arid areas of the Mongolian Plateau (i.e., northern Mongolian Plateau within Mongolia and southern Mongolian Plateau within China, Region D) lend a support to the proposal that the mid-Holocene dry phase was most likely the result of mid-Holocene high warm-season temperature.
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