DOI: 10.1029/2018JG004438
Scopus记录号: 2-s2.0-85049846561
论文题名: Warming-Induced Earlier Greenup Leads to Reduced Stream Discharge in a Temperate Mixed Forest Catchment
作者: Kim J.H. ; Hwang T. ; Yang Y. ; Schaaf C.L. ; Boose E. ; Munger J.W.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 6 起始页码: 1960
结束页码: 1975
语种: 英语
英文关键词: ecohydrology
; growing season length
; hydrologic nonstationarity
; RHESSys
; stream discharge
; vegetation phenology
Scopus关键词: climate change
; deciduous forest
; ecohydrology
; evapotranspiration
; growing season
; hydrological regime
; mixed forest
; net primary production
; phenology
; seasonal variation
; senescence
; soil water
; stream
; temperate forest
; watershed
; Harvard Forest
; Massachusetts
; United States
; Coniferophyta
英文摘要: The phenological response of vegetation to ongoing climate change may have great implications for hydrological regimes in the eastern United States. However, there have been few studies that analyze its resultant effect on catchment discharge dynamics, separating from dominant climatic controls. In this study, we examined the net effect of phenological variations on the long-term and interannual gross primary production (GPP) and evapotranspiration (ET) fluxes in a temperate deciduous forest, as well as on the catchment discharge behavior in a mixed deciduous-conifer forest catchment. First, we calibrated the spring and autumn leaf phenology models for the Harvard Forest in the northeastern United States, where the onsets of greenup and senescence have been significantly advanced and delayed, 10.3 and 6.0 days respectively, over the past two decades (1992–2011). We then integrated the phenology models into a mechanistic watershed ecohydrological model (RHESSys), which improved the interannual and long-term simulations of both the plot-scale daily GPP and ET fluxes and the catchment discharge dynamics. We found that the phenological changes amplified the long-term increases in GPP and ET driven by the climatic controls. In particular, the earlier greenup onsets resulted in increases in annual ET significantly, while the delayed senescence onsets had less influence. Consequently, the earlier greenup onsets reduced stream discharge not only during the growing season but also during the following dormant season due to soil water depletion. This study highlights the importance of understanding vegetation response to ongoing climate change in order to predict the future hydrological nonstationarity in this region. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113817
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography, Indiana University, Bloomington, IN, United States; Department of Earth and Environment, Boston University, Boston, MA, United States; Department of Civil and Environmental Engineering, Yonsei University, Seoul, South Korea; USDA-Agricultural Research Service, Beltsville, MD, United States; School for the Environment, College of Science and Mathematics, University of Massachusetts Boston, Boston, MA, United States; Harvard Forest, Harvard University, Petersham, MA, United States; School of Engineering and Applied Sciences and Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Kim J.H.,Hwang T.,Yang Y.,et al. Warming-Induced Earlier Greenup Leads to Reduced Stream Discharge in a Temperate Mixed Forest Catchment[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(6)