| 中国干旱、半干旱区近千年来沙漠化对气候变化的响应 |
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| 引用本文： | 花婷,王训明,次珍,张彩霞,郎丽丽.中国干旱、半干旱区近千年来沙漠化对气候变化的响应[J].中国沙漠,2012,32(3):618-624. |
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| 作者姓名： | 花婷 王训明 次珍 张彩霞 郎丽丽 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,甘肃兰州,730000
2. 拉萨市气象局,西藏拉萨,850000 |
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| 基金项目： | 国家自然科学基金项目，国家科技支撑计划项目 |
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| 摘 要： | 过去近千年来中国北方干旱、半干旱区沙漠化对气候变化有明显的响应，但响应的时间和幅度均存在区域差异。在中世纪温暖期，西部沙区温暖干旱，沙漠化表现为正过程；青藏高原地区沙漠化对气候变化的响应则不统一；中东部沙区为暖湿气候，发生逆过程。在小冰期，西部沙区寒冷且相对湿润，沙漠化发生逆转；青藏高原区沙漠化的响应并不明显；中东部沙区气候寒冷干燥，沙漠化加速。在20世纪暖期，西部沙区和青藏高原区总体上气候呈现暖干化特征，沙漠化发展；而中东部沙区沙漠化则在逆转，但在末期沙漠化有发展的趋势。总体上，西部沙区在暖期沙漠化发生明显的正过程，冷期逆过程明显；东部沙区在暖期沙漠化发生逆转，冷期正过程加速；青藏高原区沙漠化正逆过程主要表现为振荡形式。
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| 关 键 词： | 气候重建 干旱、半干旱区 沙漠化 响应 |
| 收稿时间： | 2011-08-10; |
Responses of Desertification to Climate Change in Arid and Semiarid Regions of China Over the Past Millennium |
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| HUA Ting,WANG Xun-ming,Cizhen,ZHANG Cai-xia,LANG Li-li.Responses of Desertification to Climate Change in Arid and Semiarid Regions of China Over the Past Millennium[J].Journal of Desert Research,2012,32(3):618-624. |
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| Authors: | HUA Ting WANG Xun-ming Cizhen ZHANG Cai-xia LANG Li-li |
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| Institution: | 1(1.Key Laboratory of Desert and Desertification,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;2.Lhasa Meteorological Bureau,Lhasa 850000,China) |
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| Abstract: | Most of the arid and semiarid regions in China have experienced multiple arid phases throughout the Quaternary,and they are highly sensitive to climate change.However,the response of desertification to climate change is poorly understood.In the present study,we selected multiple climatic proxies and desertification evidences to estimate the responses of desertification to climate changes in arid and semiarid regions of China over the past millennium.Desertification generally decreased in western China during the Little Ice Age(LIA),but increased during the Medieval Warm Period(MWP) and the Current Warm Period(CWP),which suggested the environment in western China was inclined to meliorate in cold period and deteriorate in warm period.The central and eastern regions of China tended to experience desertification in LIA,but desertification reversed in MWP and CWP,which indicated the central and eastern regions of China were prone to undergo desertification in cold period but desertification reversed in warm period.However,the desertification cycles in the Qinghai-Tibetan Plateau region showed fluctuation responding to climate change. |
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| Keywords: | climate reconstruction arid and semiarid regions desertification respor~se |
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