干旱区生态环境知识资源中心(Arid): 中亚区域陆表植被物候时空变化特征分析

Arid

	中亚区域陆表植被物候时空变化特征分析
其他题名	Spatial-temporal change of land surface phenology in Central Asia arid zone
	马勇刚 1; 张弛 1; 塔西甫拉提·特依拜 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2014
卷号	37 期号:2 页码:310-317
中文摘要	植物叶物候是反映环境条件对气候变化响应的最直观、最敏感的指标之一。在中亚干旱区开展区域物候研究有助于理解陆地生态系统对气候变化的响应。基于1982-2006年GIMMS长序列归一化植被指数数据,采用阈值法反演得到中亚地区植被过去25 a的物候数据集;然后利用 Man-Kendall趋势检验和Theil Sen斜率方法,定量分析了中亚地区植被物候的时空变化格局,并且评价了不同土地覆被类型中植被物候变化的特征。结果表明:(1)过去25a来,中亚干旱区的植被生长季的开始期和终止期在区域尺度整体上没有发生显著提前或者延迟,但在局部地区发生了较为明显的变化,表现出一定的空间差异;(2)各种土地覆被类型的物候动态明显不同:农用地的生长季开始期提前最明显,混合林的生长季终止期推迟最显著。各种植被类型中,除灌丛外均表现出生长期延长的趋势。
英文摘要	Phenology has been considered as a sensitive and intuitive indicator to reflect ecosystem’s response to the climate change. Conducting spatial-explicit phenology studies in Central Asia will improve our understanding the responses of the terrestrial ecosystems in the region to rapid climate change in recent years. Based on GIMMS (Global Inventory Modeling and Mapping Studies) data from 1982 to 2006, the vegetation phenological data was calculated using 20% minimum-maximum threshold method with the Timesat software. The Mann-Kendall trend analysis and Theil Sen slope methods were used to determine the spatial-temporal change of three phenological metrics : start of season (SOS),end of season (EOS) and length of growth season (LEN). After analysis the pattern of M-K trend and Theil Sen slope plot for three phonological metrics,there is no significant phenological change detected in the result for the whole study area. For further explorer the potential change and its reasons,the paper combined land cover data with phonological metrics for examining the phonological change in different land surface condition,and varieties of phenological metrics were analyzed for different vegetation types. The result shows that different land cover type displayed remarkably different patterns in phenological change : the start of season (SOS) of cropland advanced mostly, and the EOS (end of season) of mix forest delayed significantly. Excluded for the open shrub and closed shrub,most vegetation types showed a slight extended length of growth season (LEN). this result suggest that the national vegetation phenology,especially of the desert vegetation,may not change obviously. The result is different compared with other conclusion in most area in the world. The unique climate or vegetation types in this area may be involved to cause this result. The method used in this paper need to be compare with others to supply more precise phenological information. The availability of longer time series in the future will also allow more focused studies on the sensitivity of the metric to changes in climate.
中文关键词	遥感 ; 植被物候 ; 中亚
英文关键词	TIMESAT remote sensing vegetation phenology Timesat Central Asia
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:5124273
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231110
作者单位	1.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.新疆大学资源与环境科学学院, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	马勇刚,张弛,塔西甫拉提·特依拜. 中亚区域陆表植被物候时空变化特征分析[J]. 中国科学院新疆生态与地理研究所, 新疆大学,2014,37(2):310-317.
APA	马勇刚,张弛,&塔西甫拉提·特依拜.(2014).中亚区域陆表植被物候时空变化特征分析.干旱区地理,37(2),310-317.
MLA	马勇刚,et al."中亚区域陆表植被物候时空变化特征分析".干旱区地理 37.2(2014):310-317.