干旱区生态环境知识资源中心(Arid): 20002016年中亚天山植被变化及气候分异研究

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	20002016年中亚天山植被变化及气候分异研究
其他题名	Vegetation dynamics in response to climate change in Tianshan, Central Asia from 2000 to 2016
	陈秀妍 1; 付碧宏 2; 时丕龙 2; 郭强 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2019
卷号	42 期号:1 页码:162-171
中文摘要	利用MODIS-NDVI产品生成中亚天山20002016年植被覆盖度,利用线性回归法和偏相关法分析了中亚天山植被时空变化特征及驱动因子。结果表明:中亚天山植被生长及变化趋势具有显著的区域分异性,纬度分区上,中天山和北天山西部植被覆盖度较高的草原、农田和森林在20002016年呈现退化趋势;南天山和北天山东部植被覆盖度较低的荒漠、草原和灌丛在同期表现出改善趋势,而中国境内的东天山与境外的西天山相比具有较低的植被覆盖度以及总体改善的变化趋势。中亚天山气候在20002016年显示出暖湿化特征,温度升高幅度(5. 9%)远大于降水增加幅度(1. 3%) ,温度、降水与植被覆盖度的显著相关比例为18. 0%和42. 6%,降水是中亚天山植被变化的主要气候驱动因素。以巴音布鲁克草原为代表的东天山部分草原受到过度放牧的影响而退化严重,建议加强植被退化区的生态修复与保护力度。
英文摘要	The Tianshan Mountains plays a key role in the sustainable development of ecological environment in arid and semi-arid regions along the Silk Road Economic Belt as an important ecological shield connecting the Central Asia and Xinjiang,China. Previous studies indicated that the global warming led to a series of ecological problems in Tianshan, such as a decrease in snowfall rate, severe glacier melting,and significant grassland degradation. It has become an important and urgent task to monitor the dynamic changes of vegetation in the region and analyze its driving factors. Based on MODIS NDVI data,we calculated the Fractional Vegetation Coverage (FVC) of the Tianshan from 2000 to 2016 using the harmonic analysis of time series (HANTS) algorithm and the dimidiate pixel model. The linear regression and partial correlation analysis were used to map the tempo-spatial variations of FVC and to analyze the correlation results with the precipitation and temperature. The major conclusions were drawn as follows: (1) The vegetation growth in Tianshan had significant regional differentiation, the mean FVC in the northern, central and southern part of Tianshan was 0. 37,0 . 49 and 0. 26, respectively. In addition, the FVC value was 0. 29 in the eastern Tianshan,which is inside China,and 0. 43 in the western Tianshan,which is outside China. The FVC was higher on northern slope and western part. (2) There were 66. 8% of the vegetation pixels displayed in an improving trend. The farmland and forest with the highest FVC showed degradation trend with the area proportions of 66% and 53%, respectively. However, the shrub-desert and shrubland with the lowest FVC showed improving trend with the area proportions of 88% and 74%, respectively. Moreover, the most widely distributed grassland has an improvement ratio of 64%. (3) The temperature and precipitation of Tianshan were increased by 0. 85 ℃ and 1. 87 mm respectively during the time period from 2000 to 2016,which indicated equivalently an increment of 6. 2% of the average temperature and an increment of 1. 4% of the precipitation, respectively. (4) The correlation ratios of temperature and precipitation with the FVC were 18. 0% and 42. 6% respectively. The precipitation was the dominant factor affecting the change of vegetation in Tianshan. (5) The vegetation in the typical regions like Bayinbuluke Grassland was greatly disturbed by overgrazing. We suggested that the ecological restoration in the vegetation degeneration area should be strengthened and the regional governments should make the reasonable plan for the sustainable tourism development.
中文关键词	植被覆盖度 ; 气候驱动 ; 巴音布鲁克草原 ; 过度放牧 ; 中亚天山
英文关键词	fractional vegetation coverage climatic factors Bayinbuluke Grassland overgrazing,Tianshan Mountains Central Asia
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6413886
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239107
作者单位	1.中国科学院遥感与数字地球研究所;;中国科学院大学, ;;, ;;, 北京;;北京 100094;;100049, 中国; 2.中国科学院遥感与数字地球研究所, 北京 100094, 中国
推荐引用方式 GB/T 7714	陈秀妍,付碧宏,时丕龙,等. 20002016年中亚天山植被变化及气候分异研究[J],2019,42(1):162-171.
APA	陈秀妍,付碧宏,时丕龙,&郭强.(2019).20002016年中亚天山植被变化及气候分异研究.干旱区地理,42(1),162-171.
MLA	陈秀妍,et al."20002016年中亚天山植被变化及气候分异研究".干旱区地理 42.1(2019):162-171.