气候变化领域集成服务门户(CCPortal): Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes

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DOI	10.1111/gcb.12610
	Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes
	Fu, Yongshuo H.; Piao, Shilong; Zhao, Hongfang; Jeong, Su-Jong; Wang, Xuhui; Vitasse, Yann; Ciais, Philippe; Janssens, Ivan A.
通讯作者	Piao, SL (通讯作者)
发表日期	2014
ISSN	1354-1013
EISSN	1365-2486
起始页码	3743
结束页码	3755
卷号	20 期号:12
英文摘要	Heat requirement, expressed in growing degree days (GDD), is a widely used method to assess and predict the effect of temperature on plant development. Until recently, the analysis of spatial patterns of GDD requirement for spring vegetation green-up onset was limited to local and regional scales, mainly because of the sparse and aggregated spatial availability of ground phenology data. Taking advantage of the large temporal and spatial scales of remote sensing-based green-up onset data, we studied the spatial patterns of GDD requirement for vegetation green-up at northern middle and high latitudes. We further explored the correlations between GDD requirement for vegetation green-up and previous winter season chilling temperatures and precipitation, using spatial partial correlations. We showed that GDD requirement for vegetation green-up onset declines towards the north at a mean rate of 18.8 degrees C-days per degree latitude between 35 degrees N and 70 degrees N, and vary significantly among different vegetation types. Our results confirmed that the GDD requirement for vegetation green-up is negatively correlated with previous winter chilling, which was defined as the number of chilling days from the day when the land surface froze in the previous autumn to the day of green-up onset. This negative correlation is a well-known phenomenon from local studies. Interestingly, irrespective of the vegetation type, we also found a positive correlation between the GDD requirement and previous winter season precipitation, which was defined as the sum of the precipitation of the month when green-up onset occur and the precipitation that occurred during the previous 2months. Our study suggests that GDD requirement, chilling and precipitation may have complex interactions in their effects on spring vegetation green-up phenology. These findings have important implications for improving phenology models and could therefore advance our understanding of the interplay between spring phenology and carbon fluxes.
关键词	NDVI TIME-SERIES CLIMATE VARIABILITY SPECIES-RICHNESS THERMAL TIME BUD BURST PHENOLOGY BUDBURST MODELS CARBON TREES
英文关键词	green-up onset; growing degree days; phenology; precipitation; spatial pattern; winter chilling
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:000344375700016
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/258406
推荐引用方式 GB/T 7714	Fu, Yongshuo H.,Piao, Shilong,Zhao, Hongfang,et al. Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes[J]. 中国科学院青藏高原研究所,2014,20(12).
APA	Fu, Yongshuo H..,Piao, Shilong.,Zhao, Hongfang.,Jeong, Su-Jong.,Wang, Xuhui.,...&Janssens, Ivan A..(2014).Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes.GLOBAL CHANGE BIOLOGY,20(12).
MLA	Fu, Yongshuo H.,et al."Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes".GLOBAL CHANGE BIOLOGY 20.12(2014).