DOI: 10.1002/2013MS000241
Scopus记录号: 2-s2.0-84904902020
论文题名: Parameterization and sensitivity analysis of a process-based terrestrial ecosystem model using adjoint method
作者: Zhu Q ; , Zhuang Q
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2014
卷: 6, 期: 2 起始页码: 315
结束页码: 331
语种: 英语
英文关键词: Biogeochemistry
; Carbon
; Data fusion
; Forestry
; Parameterization
; Sensitivity analysis
; Adjoint methods
; Carbon cycling
; Data assimilation
; Net ecosystem production
; Terrestrial ecosystems
; Ecosystems
; Carbon
; Ecosystems
; Forestry
英文摘要: We developed an adjoint version of a process-based biogeochemistry model, the Terrestrial Ecosystem Model (TEM). The adjoint model of TEM was then used to: (1) conduct sensitivity studies of net ecosystem production (NEP) for three terrestrial ecosystems: grassland, deciduous broadleaf forest and evergreen needle-leaf forest; (2) rank the importance of parameters in controlling NEP; (3) optimize the model parameters by assimilating eddy flux data of NEP; and (4) evaluate parameterization by extrapolating optimal parameters to other sites that have the same plant functional type as the calibration sites. We found that: (1) the maximum rate of photosynthesis (CMAX) was the most important parameter in determining NEP, while the importance of the remaining parameters varied depending on plant functional type, suggesting that the same ecosystem process has different degrees of importance in modeling carbon fluxes; (2) the sensitivity of NEP to CMAX had a significant seasonal variability and the control of CMAX on NEP was much larger in growing season (defined as from April to October) than that in nongrowing season (defined as from December to March); and (3) after parameterization, TEM could reasonably reproduce carbon fluxes observed at eddy flux tower sites. This study provided an effective model-data fusion framework of TEM, which could improve the future quantification of terrestrial ecosystem carbon fluxes at both site and regional levels. Key Points Develop an adjoint version of process-based biogeochemical model (TEM) Conduct sensitivity analysis to rank importance of model parameters Constrain TEM by using in situ observational data © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76113
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Purdue Climate Change Research Center, Purdue University, West Lafayette IN, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette IN, United States; Department of Agronomy, Purdue University, West Lafayette IN, United States
Recommended Citation:
Zhu Q,, Zhuang Q. Parameterization and sensitivity analysis of a process-based terrestrial ecosystem model using adjoint method[J]. Journal of Advances in Modeling Earth Systems,2014-01-01,6(2)