气候变化领域集成服务门户(CCPortal): Varying responses of vegetation activity to climate changes on the Tibetan Plateau grassland

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DOI	10.1007/s00484-017-1321-5
	Varying responses of vegetation activity to climate changes on the Tibetan Plateau grassland
	Cong, Nan; Shen, Miaogen; Yang, Wei; Yang, Zhiyong; Zhang, Gengxin; Piao, Shilong
通讯作者	Shen, MG (通讯作者)
发表日期	2017
ISSN	0020-7128
EISSN	1432-1254
起始页码	1433
结束页码	1444
卷号	61 期号:8
英文摘要	Vegetation activity on the Tibetan Plateau grassland has been substantially enhanced as a result of climate change, as revealed by satellite observations of vegetation greenness (i.e., the normalized difference vegetation index, NDVI). However, little is known about the temporal variations in the relationships between NDVI and temperature and precipitation, and understanding this is essential for predicting how future climate change would affect vegetation activity. Using NDVI data and meteorological records from 1982 to 2011, we found that the inter-annual partial correlation coefficient between growing season (May-September) NDVI and temperature (RNDVI-T) in a 15-year moving window for alpine meadow showed little change, likely caused by the increasing RNDVI-T in spring (May-June) and autumn (September) and decreasing RNDVI-T in summer (July-August). Growing season RNDVI-T for alpine steppe increased slightly, mainly due to increasing RNDVI-T in spring and autumn. The partial correlation coefficient between growing season NDVI and precipitation (RNDVI-P) for alpine meadow increased slightly, mainly in spring and summer, and RNDVI-P for alpine steppe increased, mainly in spring. Moreover, RNDVI-T for the growing season was significantly higher in those 15-year windows with more precipitation for alpine steppe. RNDVI-P for the growing season was significantly higher in those 15-year windows with higher temperature, and this tendency was stronger for alpine meadow than for alpine steppe. These results indicate that the impact of warming on vegetation activity of Tibetan Plateau grassland is more positive (or less negative) during periods with more precipitation and that the impact of increasing precipitation is more positive (or less negative) during periods with higher temperature. Such positive effects of the interactions between temperature and precipitation indicate that the projected warmer and wetter future climate will enhance vegetation activity of Tibetan Plateau grassland.
关键词	ALPINE MEADOW TIME-SERIES TEMPERATURE CHINA GROWTH INDEX IMPACTS NDVI EVAPOTRANSPIRATION VARIABILITY
英文关键词	Alpine grassland; Climate change; Interaction; Precipitation; Temperature; Vegetation activity; Tibetan Plateau
语种	英语
WOS研究方向	Biophysics ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Physiology
WOS类目	Biophysics ; Environmental Sciences ; Meteorology & Atmospheric Sciences ; Physiology
WOS记录号	WOS:000407733500008
来源期刊	INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258930
推荐引用方式 GB/T 7714	Cong, Nan,Shen, Miaogen,Yang, Wei,et al. Varying responses of vegetation activity to climate changes on the Tibetan Plateau grassland[J]. 中国科学院青藏高原研究所,2017,61(8).
APA	Cong, Nan,Shen, Miaogen,Yang, Wei,Yang, Zhiyong,Zhang, Gengxin,&Piao, Shilong.(2017).Varying responses of vegetation activity to climate changes on the Tibetan Plateau grassland.INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,61(8).
MLA	Cong, Nan,et al."Varying responses of vegetation activity to climate changes on the Tibetan Plateau grassland".INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 61.8(2017).