Vegetation response to Holocene climate change in East Asian monsoon-margin region
Vegetation response to Holocene climate change in East Asian monsoon-margin region
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DOI：
10.1016/j.earscirev.2012.03.001
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发表时间：
2012-06
影响因子：
12.1
通讯作者：
Yan Zhao;Zicheng Yu
中科院分区：
文献类型：
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作者：
Yan Zhao;Zicheng Yu
本文综合了东亚季风边缘地区20个具有可靠年代学和高分辨率数据的花粉化石记录，以记录全新世植被和气候变化，并了解大尺度的控制因素。不同亚区植被在全新世经历了不同的变化。(1)在全新世中期，在东北地区现代森林与温带草原交界地带，森林扩张明显。(2)在中国中部靠近草原/森林与荒漠交界的地区，不同样地的植被分布呈现出不同的格局。综合结果表明，全新世早期边缘地区气候偏湿润，全新世中期较为湿润，而全新世晚期较为干燥，但在植被变化上存在区域差异。这种总体格局与季风或西风为主的地区非常不同。季风区在全新世早期湿度最大，而以西风带为主的中亚干旱区在全新世早期最干燥，在全新世中期最湿润。亚洲夏季风、西风带、地形和区域植被因素的相互作用可能促成了这种空间复杂性。
Fossil pollen records from 20 sites with reliable chronologies and high-resolution data in the East Asian monsoon margin region were synthesized to document Holocene vegetation and climate change and to understand the large-scale controls. The vegetation experienced different changes over the Holocene in various sub-regions. (1) Near the boundary between modern forest and temperate steppe in Northeast China, forest showed clear expansion in the middle Holocene. (2) In central China near the boundary between steppe/forest and desert, vegetation showed various patterns at different sites. (3) Further west on the Tibetan Plateau near the boundary between highland meadow/steppe and semi-desert/desert, forest expanded at most sites during the early and middle Holocene. Our synthesis indicates that climate in the margin region was slightly moist in the early Holocene, wettest in the middle Holocene, and dry in the late Holocene, though there are regional differences as reflected by vegetation change. This general pattern is very different from either monsoon- or westerly-dominated regions. The maximum moisture occurred during the early Holocene in the monsoon region, while the arid central Asia dominated by the westerlies was driest in the early Holocene and wettest in the mid-Holocene. The interplay of the Asian summer monsoon, westerlies, topography and regional vegetation factors might have contributed to this spatial complexity.