Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011

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	Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011
	Che, MingLiang(车明亮) ; Chen, BZ ; Innes, JL ; Wang, GY ; Dou, XM ; Zhou, TM ; Zhang, HF ; Yan, JW ; Xu, G ; Zhao, HW
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2014
卷号	189 页码:81-90
通讯作者	Chen, BZ
英文摘要	The spatial and temporal variations in the end date of the vegetation growing season (EGS) and their relationships with climate factors across the Qinghai-Tibetan Plateau yet have not been well researched. In this study, we used the rate of the change in the curvature of the S-curve function which integrated a logistic function and an asymmetric Gaussian function and showed a better performance for fitting the LAI (leaf area index) data to extract the EGS from a long-term time series of AVHRR (advanced very high resolution radiometer) LAI data. The spatial distribution pattern of the EGS averaged from 1982 to 2011 presented a gradual decrease from the southeast to northwest plateau. The various vegetation types showed different phenological EGS timing. The EGS occurred earlier with increasing altitude (slope = -3 day km(-1), p < 0.001). Throughout the entire Qinghai-Tibetan Plateau, the monthly air temperature and precipitation were positively correlated with the EGS, whereas the monthly sunshine duration showed a negative correlation. At the regional scale, a less pronounced increasing EGS trend (shifting about 1 day over 24 years, p = 0.084) was observed during the entire study period. By analyzing the trend turning points, we found that the EGS occurred later during 1982-1994 (slope = 0.155 day yr(-1), p = 0.045) and 1999-2011 (slope = 0.096 day yr(-1), p = 0.3), but occurred earlier during 1994-1999 (slope = -0.373 day yr(-1),p = 0.049). During 1982-2011, the annual changes of EGS negatively correlated with precipitation (p < 0.1) in June, but positively with precipitation (p < 0.1) in August. As the same time, the annual changes of EGS positively correlated with sunshine duration (p < 0.1) in June, yet negatively with sunshine duration (p < 0.1) in August. During 1982-1994, the annual changes of EGS positively correlated with air temperature (p < 0.01) and negatively with precipitation (p < 0.1) in June. During 1994-1999, the annual changes of EGS only negatively correlated with air temperature (p < 0.05)in August. During 1999-2011, the annual changes of EGS only negatively correlated with sunshine duration (p < 0.1) in August.
收录类别	SCI
资助信息	Key Project for the Strategic Science Plan in IGSNRR, CAS 2012ZD010;Research Plan of LREIS, CAS O88RA9001A;National Science Foundation of China 41071059 41271116;Chinese Academy of Sciences XDA05040403;Adaptation of AsiaPacific Forests to Climate Change APFNet/2010/PPF/001
公开日期	2014-05-16
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/28821]
专题	地理科学与资源研究所_研究生部
推荐引用方式 GB/T 7714	Che, MingLiang,Chen, BZ,Innes, JL,et al. Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011[J]. AGRICULTURAL AND FOREST METEOROLOGY,2014,189:81-90.
APA	Che, MingLiang.,Chen, BZ.,Innes, JL.,Wang, GY.,Dou, XM.,...&Zhao, HW.(2014).Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011.AGRICULTURAL AND FOREST METEOROLOGY,189,81-90.
MLA	Che, MingLiang,et al."Spatial and temporal variations in the end date of the vegetation growing season throughout the Qinghai-Tibetan Plateau from 1982 to 2011".AGRICULTURAL AND FOREST METEOROLOGY 189(2014):81-90.