| 陕甘宁地区植被恢复对气候变化和人类活动的响应(英文) |
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| 引用本文： | 李双双,延军平,刘新颜,万佳.陕甘宁地区植被恢复对气候变化和人类活动的响应(英文)[J].地理学报(英文版),2013,23(1):98-112. |
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| 作者姓名： | 李双双 延军平 刘新颜 万佳 |
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| 作者单位： | College of Tourism and Environment Science, Shaanxi Normal University |
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| 基金项目： | National Natural Science Foundation of China, No.41171090; No.40871052 |
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| 摘 要： | The "Grain for Green Project" initiated by the governments since 1999 were the dominant contributors to the vegetation restoration in the agro-pastoral transitional zone of northern China. Climate change and human activities are responsible for the improvement and degradation to a certain degree. In order to monitor the vegetation variations and clarify the causes of rehabilitation in the Shaanxi-Gansu-Ningxia Region, this paper, based on the MODIS-NDVI and climate data during the period of 2000-2009, analyzes the main charac-teristics, spatial-temporal distribution and reasons of vegetation restoration, using methods of linear regression, the Hurst Exponent, standard deviation and other methods. Results are shown as follows. (1) From 2000 to 2009, the NDVI of the study area was improved progres-sively, with a linear tendency being 0.032/10a, faster than the growth of the Three-North Shelter Forest Program (0.007/10a) from 1982 to 2006. (2) The vegetation restoration is characterized by two fast-growing periods, with an "S-shaped" increasing curve. (3) The largest proportion of the contribution to vegetation restoration was observed in the slightly improved area, followed by the moderate and the significantly improved area; the degraded area is distributed sporadically over southern part of Ningxia Hui Autonomous Region as well as eastern Dingbian of Shaanxi province, Huanxian and Zhengyuan of Gansu province. (4) Climate change and human activities are two driving forces in vegetation restoration; more-over anthropogenic factors such as "Grain for Green Project" were the main causes leading to an increasing trend of NDVI on local scale. However, its influencing mechanism remains to be further investigated. (5) The Hurst Exponent of NDVI time series shows that the vegetation restoration was sustainable. It is expected that improvement in vegetation cover will expand to the most parts of the region.
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| 关 键 词： | 植被恢复 人类活动 气候变化 宁夏地区 陕西省 甘肃省 退耕还林工程 北方农牧交错区 |
| 收稿时间： | 2012-06-09 |
Response of vegetation restoration to climate change and human activities in Shaanxi-Gansu-Ningxia Region |
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| LI Shuangshuang
,
YAN Junping
,
LIU Xinyan
,
WAN Jia.Response of vegetation restoration to climate change and human activities in Shaanxi-Gansu-Ningxia Region[J].Journal of Geographical Sciences,2013,23(1):98-112. |
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| Authors: | LI Shuangshuang YAN Junping LIU Xinyan WAN Jia |
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| Institution: | College of Tourism and Environment Science, Shaanxi Normal University, Xi’an 710062, China |
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| Abstract: | The “Grain for Green Project” initiated by the governments since 1999 were the dominant contributors to the vegetation restoration in the agro-pastoral transitional zone of northern China. Climate change and human activities are responsible for the improvement and degradation to a certain degree. In order to monitor the vegetation variations and clarify the causes of rehabilitation in the Shaanxi-Gansu-Ningxia Region, this paper, based on the MODIS-NDVI and climate data during the period of 2000–2009, analyzes the main characteristics, spatial-temporal distribution and reasons of vegetation restoration, using methods of linear regression, the Hurst Exponent, standard deviation and other methods. Results are shown as follows. (1) From 2000 to 2009, the NDVI of the study area was improved progressively, with a linear tendency being 0.032/10a, faster than the growth of the Three-North Shelter Forest Program (0.007/10a) from 1982 to 2006. (2) The vegetation restoration is characterized by two fast-growing periods, with an “S-shaped” increasing curve. (3) The largest proportion of the contribution to vegetation restoration was observed in the slightly improved area, followed by the moderate and the significantly improved area; the degraded area is distributed sporadically over southern part of Ningxia Hui Autonomous Region as well as eastern Dingbian of Shaanxi province, Huanxian and Zhengyuan of Gansu province. (4) Climate change and human activities are two driving forces in vegetation restoration; moreover anthropogenic factors such as “Grain for Green Project” were the main causes leading to an increasing trend of NDVI on local scale. However, its influencing mechanism remains to be further investigated. (5) The Hurst Exponent of NDVI time series shows that the vegetation restoration was sustainable. It is expected that improvement in vegetation cover will expand to the most parts of the region. |
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| Keywords: | the vegetation cover "Grain for Green Project" spatial-temporal vegetation patterns climate change Shaanxi-Gansu-Ningxia Region |
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