气候变化领域集成服务门户(CCPortal): Precipitation impacts on vegetation spring phenology on the Tibetan Plateau

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DOI	10.1111/gcb.12961
	Precipitation impacts on vegetation spring phenology on the Tibetan Plateau
	Shen, Miaogen; Piao, Shilong; Cong, Nan; Zhang, Gengxin; Janssens, Ivan A.
通讯作者	Shen, MG (通讯作者)
发表日期	2015
ISSN	1354-1013
EISSN	1365-2486
起始页码	3647
结束页码	3656
卷号	21 期号:10
英文摘要	The ongoing changes in vegetation spring phenology in temperate/cold regions are widely attributed to temperature. However, in arid/semiarid ecosystems, the correlation between spring temperature and phenology is much less clear. We test the hypothesis that precipitation plays an important role in the temperature dependency of phenology in arid/semiarid regions. We therefore investigated the influence of preseason precipitation on satellite-derived estimates of starting date of vegetation growing season (SOS) across the Tibetan Plateau (TP). We observed two clear patterns linking precipitation to SOS. First, SOS is more sensitive to interannual variations in preseason precipitation in more arid than in wetter areas. Spatially, an increase in long-term averaged preseason precipitation of 10mm corresponds to a decrease in the precipitation sensitivity of SOS by about 0.01daymm(-1). Second, SOS is more sensitive to variations in preseason temperature in wetter than in dryer areas of the plateau. A spatial increase in precipitation of 10mm corresponds to an increase in temperature sensitivity of SOS of 0.25day degrees C-1 (0.25 day SOS advance per 1 degrees C temperature increase). Those two patterns indicate both direct and indirect impacts of precipitation on SOS on TP. This study suggests a balance between maximizing benefit from the limiting climatic resource and minimizing the risk imposed by other factors. In wetter areas, the lower risk of drought allows greater temperature sensitivity of SOS to maximize the thermal benefit, which is further supported by the weaker interannual partial correlation between growing degree days and preseason precipitation. In more arid areas, maximizing the benefit of water requires greater sensitivity of SOS to precipitation, with reduced sensitivity to temperature. This study highlights the impacts of precipitation on SOS in a large cold and arid/semiarid region and suggests that influences of water should be included in SOS module of terrestrial ecosystem models for drylands.
关键词	GREEN-UP CLIMATE-CHANGE SATELLITE TEMPERATURE MODIS DATE VARIABILITY GRASSLANDS RESPONSES BUDBURST
英文关键词	climate change; precipitation; sensitivity; temperature; Tibetan Plateau; vegetation spring phenology
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000360994500008
来源期刊	GLOBAL CHANGE BIOLOGY
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/258452
推荐引用方式 GB/T 7714	Shen, Miaogen,Piao, Shilong,Cong, Nan,et al. Precipitation impacts on vegetation spring phenology on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2015,21(10).
APA	Shen, Miaogen,Piao, Shilong,Cong, Nan,Zhang, Gengxin,&Janssens, Ivan A..(2015).Precipitation impacts on vegetation spring phenology on the Tibetan Plateau.GLOBAL CHANGE BIOLOGY,21(10).
MLA	Shen, Miaogen,et al."Precipitation impacts on vegetation spring phenology on the Tibetan Plateau".GLOBAL CHANGE BIOLOGY 21.10(2015).