DOI: 10.1111/gcb.12610
论文题名: Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes
作者: Fu Y.H. ; Piao S. ; Zhao H. ; Jeong S.-J. ; Wang X. ; Vitasse Y. ; Ciais P. ; Janssens I.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 12 起始页码: 3743
结束页码: 3755
语种: 英语
英文关键词: Green-up onset
; Growing degree days
; Phenology
; Precipitation
; Spatial pattern
; Winter chilling
Scopus关键词: rain
; computer simulation
; geography
; heat
; physiology
; plant development
; season
; theoretical model
; Computer Simulation
; Geography
; Hot Temperature
; Models, Theoretical
; Plant Development
; Rain
; Seasons
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 °C-days per degree latitude between 35°N and 70°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 2 months. 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. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62187
Appears in Collections: 影响、适应和脆弱性
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作者单位: College of Urban and Environmental Sciences, Peking University, Yiheyuan Road 5, Beijing, China; Research group of Plant and Vegetation Ecology (PLECO), Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, Antwerp, Belgium; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Institute of Botany, University of Basel, Schönbeinstrasse 6, Basel, Switzerland; Laboratoire des Sciences du Climat et de l'Environnement, CEA CNRS UVSQ, Gif-sur-Yvette, France
Recommended Citation:
Fu Y.H.,Piao S.,Zhao H.,et al. Unexpected role of winter precipitation in determining heat requirement for spring vegetation green-up at northern middle and high latitudes[J]. Global Change Biology,2014-01-01,20(12)