| 青藏高原植物返青期变化及其对气候变化的响应 |
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| 引用本文： | 丁明军,张镱锂,刘林山,王兆锋.青藏高原植物返青期变化及其对气候变化的响应[J].气候变化研究进展,2011,7(5):317-323. |
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| 作者姓名： | 丁明军 张镱锂 刘林山 王兆锋 |
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| 作者单位： | 1. 江西师范大学地理与环境学院、中国科学院地理科学与资源研究所;2. 中国科学院地理科学与资源研究所;3. 中科院地理科学与资源研究所;4. ; |
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| 基金项目： | 国家重点基础研究发展计划(2010CB951704); 国家自然科学基金项目(40771206,40901057) |
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| 摘 要： | 基于连续的植被指数（NDVI）、气温和降水数据，提取了1982—2009年青藏高原典型台站邻近区域的植物返青期以及0℃和5℃旬均温始期的时序数据，分析了其时空变化特征，探讨了青藏高原冬、春季的气温、降水变化对植物返青期的影响。结果表明：1) 青藏高原典型台站邻近区域植物返青期多年平均值在东西向和南北向上存在显著差异；1982—2009年间，青藏高原典型台站邻近区域植物返青期整体呈提前趋势。2) 青藏高原典型台站0℃和5℃旬均温始期整体呈提前趋势，5℃旬均温始期提前趋势更为显著。3) 青藏高原植物返青期随着冬、春季气温升高和降水增加而提前。与降水相比，返青期与气温的相关程度更高。冬季气温比春季气温对植物返青期的影响更大。
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| 关 键 词： | 青藏高原 返青期 气温 降水 Tibetan Plateau vegetation regreening air temperature precipitation |
| 收稿时间： | 2011-01-11 |
| 修稿时间： | 2011-08-19 |
Spatiotemporal Changes of Commencement of Vegetation Regreening and Its Response to Climate Change on Tibetan Plateau |
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| Ding Mingjun,Zhang Yili,Liu Linshan,Wang Zhaofeng.Spatiotemporal Changes of Commencement of Vegetation Regreening and Its Response to Climate Change on Tibetan Plateau[J].Advances in Climate Change,2011,7(5):317-323. |
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| Authors: | Ding Mingjun Zhang Yili Liu Linshan Wang Zhaofeng |
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| Institution: | Ding Mingjun1,2,Zhang Yili1,Liu Linshan1,Wang Zhaofeng1(1 Institute of Geographic Science and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China,2 School of Geography and Environment,Jiangxi Normal University,Nanchang 330022,China) |
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| Abstract: | Detecting the growing season variability of terrestrial vegetation is crucial for identifying responses of ecosystems to recent climate change.Based on the normalized difference vegetation index(NDVI) and the air temperature and precipitation data,we have extracted the commencement of growing season(CGS) and the commencement of dekadly average temperature(CDAT) of 0 and 5℃ at typical weather stations on Tibetan Plateau from 1982-2009,and analyzed their spatiotemporal changes and the relationships between the CGS of vegetation and the air temperature and precipitation of winter and spring.The results show: the CDAT of 0 and 5℃ on the whole showed an advanced tendency,and the tendency of 5℃ was more significant than that of 0℃;the multiple years average of CGS near typical weather stations gradually delayed from south to north and from east to west,and from 1982 to 2009,the CGS displayed an advanced tendency at all typical weather stations;and the CGS had a negative relation with the air temperature and precipitation of winter and spring,furthermore,the correlation of CGS with temperature was stronger than with precipitation.Different seasonal temperatures had different effects on CGS and the winter temperature affected CGS more than spring temperature. |
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| Keywords: | Tibetan Plateau vegetation regreening air temperature precipitation |
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