干旱区生态环境知识资源中心(Arid): 柴达木盆地植被生长时空变化特征及其对气候要素的响应

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	柴达木盆地植被生长时空变化特征及其对气候要素的响应
其他题名	Spatial-temporal variations of Vegetation Activities and Its Responses to Climatic Factors in the Qaidam Basin
	徐浩杰; 杨太保
来源期刊	自然资源学报
ISSN	1000-3037
出版年	2014
卷号	29 期号:3 页码:398-409
中文摘要	以20012010年MODIS NDVI 植被数据为基础,并结合该区同期气温和降水量数据,采用线性趋势分析、偏相关分析、Hurst 指数等数理分析方法,研究了近10 a 来柴达木盆地植被时空变化特征、影响因素及未来可能的变化趋势。结果表明:①20012010年柴达木盆地植被生长季NDVI平均值(NDVI)呈显著增加趋势,线性增长率为0.041/10 a。柴达木盆地主要植被类型灌丛、草原、荒漠NDVI 的线性增长率分别为0.043/10 a、0.034/10 a、 0.028/10 a;②柴达木盆地植被变化具有阶段性特征,整体呈S型增长,具有两次明显的植被快速增长期;③柴达木盆地植被改善面积占研究区总面积的12.43%,并主要分布在布尔汉布达山、祁漫塔格山、鄂拉山、柴达木山、宗务隆山的高山区,冬给措纳湖周边和绿洲核心区。植被退化面积仅占研究区总面积的0.35%,并主要分布在绿洲边缘区,特别是柴达木河绿洲和那陵格勒河绿洲的中下游地区;④植被NDVI 与15月平均气温以及58月可利用降水量呈显著正相关关系,植被生长与温度呈显著正相关的区域主要分布在绿洲核心区及高山区,占植被区面积的8.36%,植被生长与可利用降水量呈显著正相关的区域主要分布在低山区及山地河谷地带,占植被区面积的30.95%;⑤植被生长季延长和生长加速是柴达木盆地植被NDVI 增加的主要原因,气候的暖湿化是促使柴达木盆地植被改善的主要驱动力;⑥柴达木盆地植被改善具有强持续性,未来大部分区域植被将持续改善。
英文摘要	Global climate change has led to significant vegetation changes in recent decades. The Qaidam Basin, most of which was located in hyper-arid areas, is undergoing a process of prominent warming. It is necessary to investigate the response of vegetation to the climatic variations for a better understanding of the accumulated consequence of climate change. Vegetation NDVI is an important indicator for evaluating terrestrial eco-system change. Based on MODIS NDVI and climate data during the period 2001-2010, we analyzed spatial and temporal variation of vegetation change and its reasons for that by using methods of linear regression, partial correlation, the Hurst index and other methods. Results were shown as follows: 1) During 2001-2010, the growing season NDVI (-------- NDVI) of the study area was improved progressively, with a linear tendency of 0.041/10 a. Trends in NDVI of shrubs, grasslands and shrub-deserts were +0.043/10 a, +0.034/10 a and +0.028/10 a respectively. The shrubs improved most significantly. 2) Vegetation restoration was characterized by two fast-growing periods, with an S-shaped increasing curve. 3) Vegetation restoration and degradation area accounted for about 12.43% and 0.35% of the whole study area. The restoration area was mainly distributed in high altitudes of the Burhan Budai Mt., Qimantag Mt., Ela Mt., Qaidam Mt. and Zongwulong Mt. surrounding areas of the Donggi Conga Lake and core areas of oasis. The degradation area was mainly distributed in margins of oasis, especially in the middle and lower reaches of the Qaidam and Leningrad rivers. 4) Vegetation NDVI was most positively related with average temperature (January to May) and available precipitation (May to August). The significant positive region between vegetation growth and temperature occupied about 8.36% of the vegetated lands and was mainly distributed in core areas of oasis and high latitude mountains. The significant positive region between vegetation growth and available precipitation made up about 30.95% of the vegetated lands and was mainly distributed in low latitude mountains and mountain valleys. Vegetation growth was more sensitive to hydrological conditions than to thermal conditions. 5) Vegetation growing season extension and growth acceleration were the main reasons for vegetation restoration in the Qaidam Basin. Warmer and wetter climate was the main driving force to promote vegetation growth in the Qaidam Basin. 6) The Hurst index of NDVI time series showed vegetation restoration was persistent. It is expected that promotion in vegetation growth will expand to the most parts of the region. This finding not only underlines the importance of temperature for vegetation growth in high latitudes, but also verifies the effects of precipitation on vegetation growth in low attitudes.
中文关键词	柴达木盆地 ; 植被变化 ; 温度 ; 可利用降水量
英文关键词	the Qaidam Basin vegetation change temperature available precipitation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5092875
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232323
作者单位	兰州大学资源环境学院冰川与生态地理研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	徐浩杰,杨太保. 柴达木盆地植被生长时空变化特征及其对气候要素的响应[J]. 兰州大学,2014,29(3):398-409.
APA	徐浩杰,&杨太保.(2014).柴达木盆地植被生长时空变化特征及其对气候要素的响应.自然资源学报,29(3),398-409.
MLA	徐浩杰,et al."柴达木盆地植被生长时空变化特征及其对气候要素的响应".自然资源学报 29.3(2014):398-409.