| 黄河源区植被覆盖度对气温和降水的响应研究 |
| |
| 引用本文： | 吴喜芳,李改欣,潘学鹏,王彦芳,张莎,刘峰贵,沈彦俊.黄河源区植被覆盖度对气温和降水的响应研究[J].资源科学,2015,37(3):512-521. |
| |
| 作者姓名： | 吴喜芳 李改欣 潘学鹏 王彦芳 张莎 刘峰贵 沈彦俊 |
| |
| 作者单位： | 河北师范大学资源与环境科学学院河北省环境演变与生态建设省级重点实验室, 石家庄 050024;中国科学院遗传与发育生物学研究所农业资源研究中心水资源重点实验室, 石家庄 050021,石家庄幼儿师范高等专科学校, 石家庄 050228,中国科学院遗传与发育生物学研究所农业资源研究中心水资源重点实验室, 石家庄 050021;青海师范大学生命与地理科学学院, 西宁 810008,中国科学院遗传与发育生物学研究所农业资源研究中心水资源重点实验室, 石家庄 050021;河北省社会科学院社会发展研究所河北省生态环境建设研究中心, 石家庄 050051,河北师范大学资源与环境科学学院河北省环境演变与生态建设省级重点实验室, 石家庄 050024,青海师范大学生命与地理科学学院, 西宁 810008,中国科学院遗传与发育生物学研究所农业资源研究中心水资源重点实验室, 石家庄 050021 |
| |
| 基金项目： | 国家自然科学基金项目(编号:41271123);河北省自然地理学省级重点学科项目 |
| |
| 摘 要： | 本文基于1982-2006年NOAA/AVHRR NDVI和2000-2012年MODIS NDVI两种遥感植被数据以及同期站点的月平均气温和降水资料,通过对重叠观测时期的数据建立映射关系,对NOAA/AVHRR NDVI数据延长插补,分析黄河源区1982-2012年植被的时空变化特征及其对气候变化的响应。结果表明,黄河源区植被覆盖度呈由东南向西北递减的分布格局;海拔在3 000m以下和4 500m以上地区植被覆盖度相对较差,3 000~4 500m地区植被覆盖度相对较好;植被覆盖度在时间变化上呈增加趋势,但在2000年出现突变点,2000年之后增加速率约为之前的2倍;植被覆盖在整体增加的背景下,也存在零星的退化现象,而在西部高海拔和北部较干旱的低植被覆盖度区域植被覆盖的增加仍存在着较大的年际波动,并不稳定;相对于降水,研究区的植被覆盖对气温变化的响应更为敏感,属于热量限制型生态区。
|
| 关 键 词： | 降水 黄河源区 气温 植被覆盖度 |
Response of vegetation cover to temperature and precipitation in the source region of the Yellow River |
| |
| WU Xifang,LI Gaixin,PAN Xuepeng,WANG Yanfang,ZHANG Sh,LIU Fenggui and SHEN Yanjun.Response of vegetation cover to temperature and precipitation in the source region of the Yellow River[J].Resources Science,2015,37(3):512-521. |
| |
| Authors: | WU Xifang LI Gaixin PAN Xuepeng WANG Yanfang ZHANG Sh LIU Fenggui and SHEN Yanjun |
| |
| Institution: | College of Resources and Environment Science, Hebei Key L aboratory of Environmental Change and Ecological Construction, Hebei Normal University, Shijiazhuang 050024, China;Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China,Shijiazhuang Preschool Teachers College, Shijiazhuang 050028, China,Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China;School of Life and Geographical Sciences, Qinghai Normal University, Xining 810008, China,Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China;Research center for Hebei Ecological Environmental Construction, Hebei Academy of Social Sciences, Shijiazhuang 050051, China,College of Resources and Environment Science, Hebei Key L aboratory of Environmental Change and Ecological Construction, Hebei Normal University, Shijiazhuang 050024, China,School of Life and Geographical Sciences, Qinghai Normal University, Xining 810008, China and Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China |
| |
| Abstract: | The source region of the Yellow River is located in the hinterland of the Qinghai-Tibet Plateau. The evolution of its alpine vegetation system not only determines the local ecological environment and livestock production, but also significantly influences the ecological safety of the Yellow River basin. Under the influence of climate change and human activities, grassland degradation over upstream headwaters of the Yellow River is increasingly serious. Examining the spatial-temporal characteristics of vegetation cover and its response to climate change in the study area is important for understanding vegetation ecology and changes in water yield across the Tibetan Plateau. Here, based on NOAA/AVHRR NDVI (1982-2006) and MODIS NDVI (2000-2012), monthly air temperature and precipitation of stations, spatial-temporal characteristics of vegetation cover and its response to climate change were investigated in the study area. To analyze the long time series of vegetation variation in the study area, NOAA/AVHRR NDVI were extended by a correction algorithm based on the two kinds of data sets during the overlapping period(2000-2006). The results show that vegetation cover decreased from the southeast to the northwest of the study area. Vegetation cover was poor in areas where elevation was lower than 3 000m and higher than 4 500m, but better between 3 000m and 4 500m. Annual vegetation cover revealed an increasing trend from 1982-2012 but there was an abrupt point in 2000, and the increasing rate after 2000 was about two times before. Vegetation cover change varied in different regions. On the whole, vegetation cover increased from 1982 to 2012 but there was also sporadic degradation. In low vegetation cover regions mainly located in the western high altitude regions and northern arid regions, vegetation cover increases were characterized by large interannual fluctuations. The results of correlation analysis between vegetation cover and climate factors showed vegetation cover was more sensitive to temperature compared with precipitation in the growing season. This indicates that the study area is a typical calorie restriction ecological region. |
| |
| Keywords: | precipitation source region of the Yellow River temperature vegetation cover |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《资源科学》浏览原始摘要信息 |
| 点击此处可从《资源科学》下载免费的PDF全文 |
|
