Reconciling the ‘westerlies’ and ‘monsoon’ models: A new hypothesis for the Holocene moisture evolution of the Xinjiang region, NW China
Reconciling the ‘westerlies’ and ‘monsoon’ models: A new hypothesis for the Holocene moisture evolution of the Xinjiang region, NW China
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协调“西风带”和“季风”模型：中国西北部新疆地区全新世水分演化的新假说
DOI：
10.1016/j.earscirev.2019.03.002
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发表时间：
2019-04
影响因子：
12.1
通讯作者：
Chen Fahu
中科院分区：
文献类型：
--
作者：
Rao Zhiguo;Wu D;an;Shi Fuxi;Guo Haichun;Cao Jiantao;Chen Fahu
中国内陆干旱区新疆地区全新世水汽条件演化的争论日益激烈。对湖泊沉积物、黄土、沙丘和泥炭的气候重建分析揭示了长期的湿润趋势（“西风带模式”），而其他研究，主要是对湖泊沉积物和石笋的研究，则表明了长期的干燥趋势（“季风模式”）。对于这些相互矛盾的解释，可以做两个观察：(i)“季风模式”记录主要来自降水较多的高海拔山区，而“西风带模式”记录主要来自降水较少的低海拔山前地区和盆地。（ii）越来越多的新疆地区及其周边地区的研究表明，在全新世期间，新疆地区有长期的变暖趋势。基于这些观测，我们提出了以下简单的假设，这是“西风带”模式和“季风”模式之间的折衷。在全新世长期变暖的背景下，高海拔山区冰雪融水的增加为低海拔湖泊提供了补给，最终导致湖泊水位升高，绿洲面积扩大，局部水分循环增强。这可能解释了为什么在湖泊和邻近的黄土和泥炭沉积物的湿度记录中证明的“西风带模式”包含一个长期的湿润趋势。这一假设在很大程度上与该地区目前正在经历气候变暖的部分地区相一致。更重要的是，随着近期气候变暖的可能加速，高海拔山区冰雪的进一步消融将对新疆社会经济的可持续发展构成重大且日益严重的威胁。因此，重要的是政府和公众都要认真考虑该地区无冰环境的影响。
The Holocene evolution of moisture conditions in the arid Xinjiang region in inland NW China is increasingly debated. Analysis of climatic reconstructions from lake sediments, loess, sand-dunes and peats reveals a long-term wetting trend (‘westerlies model’), whereas other studies, mainly of lake sediments and stalagmites, have indicated a long-term drying trend (‘monsoon model’). Two observations can be made about these conflicting interpretations: (i) The ‘monsoon model’ records are mainly from high-altitude mountain areas with higher precipitation, whereas the ‘westerlies model’ records are mainly from low-altitude piedmont areas and basins, with lower precipitation. (ii) An increasing number of studies of the Xinjiang region and its surroundings demonstrate a long-term warming trend during the Holocene. Based on these observations, we propose the following simple hypothesis which is a compromise between the ‘westerlies’ and ‘monsoon’ models. Against the background of long-term Holocene warming, the increased meltwater supply from snow and ice in high-altitude mountain areas fed the low-altitude lakes, which finally resulted in higher lake levels, expanded oasis areas, and enhanced local moisture recycling. This potentially explains why the ‘westerlies model’ evidenced in the moisture records from lakes and adjacent loess and peat deposits comprises a long-term wetting trend. This hypothesis is largely consistent with the parts of the region that are currently experiencing climatic warming. More importantly, with the likely acceleration of climatic warming in the near future, the further ablation of ice and snow in the high-altitude mountain regions will present a major and growing threat to the sustainable socioeconomic development of Xinjiang. Consequently, it is important that both the government and the public seriously consider the implications of an ice-free environment in the region.
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DOI：
10.1073/pnas.ss11136
发表时间：
2014-09
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
通讯作者：
--
DOI：
10.1016/j.palaeo.2018.04.006
发表时间：
2018-11
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Haichao Xie;Huiwen Zhang;J. Ma;Guoqiang Li;Qiang Wang;Z. Rao;Wei Huang;Xiao-zhong Huang;Fahu Chen
通讯作者：
Haichao Xie;Huiwen Zhang;J. Ma;Guoqiang Li;Qiang Wang;Z. Rao;Wei Huang;Xiao-zhong Huang;Fahu Chen
DOI：
10.1073/pnas.ss1155
发表时间：
2018-01
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
Charles;Doubleday;Jiyong Park;Ashay Patel;W. Russell;D. Russell;K. Houk;J. McCoy;Melanie J. Mills;K. Walton;R. Thomas;Cotton;Paul Gregorevic;C. Harrison
通讯作者：
Charles;Doubleday;Jiyong Park;Ashay Patel;W. Russell;D. Russell;K. Houk;J. McCoy;Melanie J. Mills;K. Walton;R. Thomas;Cotton;Paul Gregorevic;C. Harrison
影响因子：
3.4
作者：
V. Aizen;P. Mayewski;E. Aizen;D. Joswiak;A. Surazakov;S. Kaspari;B. Grigholm;M. Krachler;M. Handley;A. Finaev
通讯作者：
V. Aizen;P. Mayewski;E. Aizen;D. Joswiak;A. Surazakov;S. Kaspari;B. Grigholm;M. Krachler;M. Handley;A. Finaev
影响因子：
4.6
作者：
Sakai A;Fujita K
通讯作者：
Fujita K