气候变化领域集成服务门户(CCPortal): Parametric Controls on Vegetation Responses to Biogeochemical Forcing in the CLM5

CCPortal

DOI	10.1029/2019MS001609
	Parametric Controls on Vegetation Responses to Biogeochemical Forcing in the CLM5
	Fisher R.A.; Wieder W.R.; Sanderson B.M.; Koven C.D.; Oleson K.W.; Xu C.; Fisher J.B.; Shi M.; Walker A.P.; Lawrence D.M.
发表日期	2019
ISSN	19422466
起始页码	2879
结束页码	2895
卷号	11 期号:9
英文摘要	Future projections of land carbon uptake in Earth System Models are affected by land surface model responses to both CO2 and nitrogen fertilization. The Community Land Model, Version 5 (CLM5), contains a suite of modifications to carbon and nitrogen cycle representation. Globally, the CLM5 has a larger CO2 response and smaller nitrogen response than its predecessors. To improve our understanding of the controls over the fertilization responses of the new model, we assess sensitivity to eight parameters pertinent to the cycling of carbon and nitrogen by vegetation, both under present-day conditions and with CO2 and nitrogen fertilization. The impact of fertilization varies with both model parameters and with the balance of limiting factors (water, temperature, nutrients, and light) in the pre-fertilization model state. The model parameters that impact the pre-fertilization state are in general not the same as those that control fertilization responses, meaning that goodness of fit to present-day conditions does not necessarily imply a constraint on future transient projections. Where pre-fertilization state has low leaf area, fertilization-induced increases in leaf production amplify the model response to the initial fertilization via further increases in photosynthesis. Model responses to CO2 and N fertilization are strongly impacted by how much plant communities can increase their rates of nitrogen fixation and also directly affected by costs of N extraction from soil and stoichiometric flexibility. Illustration of how parametric flexibility impacts model outputs should help inform the interpretation of carbon-climate feedbacks estimated by in fully coupled Earth system model simulations. ©2019. The Authors.
英文关键词	biogeochemistry; carbon; CLM5; nitrogen; parameter; sensitivity
语种	英语
scopus关键词	Biogeochemistry; Carbon; Carbon dioxide; Climate models; Earth (planet); Nitrogen; Nitrogen fertilizers; Vegetation; Carbon and nitrogen; CLM5; Community land models; Land surface modeling; Nitrogen fertilization; parameter; sensitivity; Vegetation response; Nitrogen fixation; biogeochemical cycle; biogeochemistry; carbon cycle; climate modeling; nitrogen; nitrogen cycle; nitrogen fixation; parameter estimation; sensitivity analysis; soil carbon
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156866
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Centre Européen Research et de Formation Avencée en Calcul Scientifique, Toulouse, France; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, United States; Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Oak Ridge National Laboratory, Oak Ridge, TN, United States
推荐引用方式 GB/T 7714	Fisher R.A.,Wieder W.R.,Sanderson B.M.,et al. Parametric Controls on Vegetation Responses to Biogeochemical Forcing in the CLM5[J],2019,11(9).
APA	Fisher R.A..,Wieder W.R..,Sanderson B.M..,Koven C.D..,Oleson K.W..,...&Lawrence D.M..(2019).Parametric Controls on Vegetation Responses to Biogeochemical Forcing in the CLM5.Journal of Advances in Modeling Earth Systems,11(9).
MLA	Fisher R.A.,et al."Parametric Controls on Vegetation Responses to Biogeochemical Forcing in the CLM5".Journal of Advances in Modeling Earth Systems 11.9(2019).