globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000540
Scopus记录号: 2-s2.0-84992302469
论文题名:
Modeling the diurnal variability of respiratory fluxes in the Canadian Terrestrial Ecosystem Model (CTEM)
作者: Badawy B; , Arora V; K; , Melton J; R; , Nassar R
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期:2
起始页码: 614
结束页码: 633
语种: 英语
英文关键词: Carbon dioxide ; Ecology ; Photosynthesis ; Physiological models ; Soil moisture ; Carbon cycles ; Diurnal variation ; Dynamic vegetation model ; Ecosystem respiration ; Net ecosystem exchange ; Physiological process ; Terrestrial biosphere ; Terrestrial ecosystems ; Ecosystems ; annual cycle ; carbon flux ; diurnal variation ; ecosystem modeling ; net ecosystem exchange ; observational method ; photosynthesis ; respiration ; soil moisture ; terrestrial ecosystem
英文摘要: The Canadian Terrestrial Ecosystem Model (CTEM) coupled to the Canadian Land Surface Scheme (CLASS) is a dynamic vegetation model that incorporates photosynthesis and respiration submodules among many other physiological processes of the terrestrial biosphere. While the photosynthesis and leaf respiration submodules of CTEM operate at a time step of 30 min, other respiratory fluxes are estimated at a daily time step using the daily-averaged values of canopy and soil temperature, and soil moisture content. Here we modify CTEM to be able to simulate the diurnal variation of ecosystem respiratory fluxes caused by the diurnal variation in the driving climate data. Simulating respiration at a 30 min time step changed the equilibrium states of primary carbon pools and fluxes. This required changes to some of the model's parameters in order to realistically simulate the equilibrium values of carbon pools and fluxes. The resulting estimated daily and annual carbon fluxes from the modified and original CTEM are similar with small relative differences. The similar annual cycles of daily values of primary CO2 fluxes confirm that modeling the respiratory fluxes at a subdaily time step does not affect the annual cycles of these fluxes. We also demonstrate that the modified version of the model is able to simulate the diurnal cycle of net ecosystem exchange of CO2 fluxes that are broadly comparable to observation-based estimates at two flux tower sites and exhibit realistic seasonal patterns. Limitations remain in the modeled diurnal patterns of primary land-atmosphere CO2 fluxes which will form the basis of further model improvements. © 2016. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75912
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: Climate Research Division, Environment and Climate Change Canada, Toronto, ON, Canada; Climate Research Division, Environment and Climate Change Canada, Victoria, BC, Canada

Recommended Citation:
Badawy B,, Arora V,K,et al. Modeling the diurnal variability of respiratory fluxes in the Canadian Terrestrial Ecosystem Model (CTEM)[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(2)
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