DOI: 10.1002/2016MS000860
Scopus记录号: 2-s2.0-85019586089
论文题名: Testing the capability of ORCHIDEE land surface model to simulate Arctic ecosystems: Sensitivity analysis and site-level model calibration
作者: Dantec-Nédélec S ; , Ottlé C ; , Wang T ; , Guglielmo F ; , Maignan F ; , Delbart N ; , Valdayskikh V ; , Radchenko T ; , Nekrasova O ; , Zakharov V ; , Jouzel J
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 2 起始页码: 1212
结束页码: 1230
语种: 英语
英文关键词: Cryogenics
; Heat transfer
; Permafrost
; Sensitivity analysis
; Snow
; Soils
; Surface measurement
; Temperature
; Thermodynamics
; Calibration process
; Global sensitivity analysis
; Hydrothermal properties
; Land surface modeling
; Orchidee
; Soil vegetation atmospheres
; Tundra
; Western siberia
; Soil surveys
; active layer
; calibration
; hydrothermal system
; land surface
; numerical model
; peat soil
; permafrost
; sensitivity analysis
; snowpack
; soil temperature
; testing method
; thermodynamics
; tundra
; Arctic
; Russian Federation
; Siberia
; Yamal Peninsula
; Yamalo-Nenets
英文摘要: The ORCHIDEE land surface model has recently been updated to improve the representation of high-latitude environments. The model now includes improved soil thermodynamics and the representation of permafrost physical processes (soil thawing and freezing), as well as a new snow model to improve the representation of the seasonal evolution of the snow pack and the resulting insulation effects. The model was evaluated against data from the experimental sites of the WSibIso-Megagrant project (www.wsibiso.ru). ORCHIDEE was applied in stand-alone mode, on two experimental sites located in the Yamal Peninsula in the northwestern part of Siberia. These sites are representative of circumpolar-Arctic tundra environments and differ by their respective fractions of shrub/tree cover and soil type. After performing a global sensitivity analysis to identify those parameters that have most influence on the simulation of energy and water transfers, the model was calibrated at local scale and evaluated against in situ measurements (vertical profiles of soil temperature and moisture, as well as active layer thickness) acquired during summer 2012. The results show how sensitivity analysis can identify the dominant processes and thereby reduce the parameter space for the calibration process. We also discuss the model performance at simulating the soil temperature and water content (i.e., energy and water transfers in the soil-vegetation-atmosphere continuum) and the contribution of the vertical discretization of the hydrothermal properties. This work clearly shows, at least at the two sites used for validation, that the new ORCHIDEE vertical discretization can represent the water and heat transfers through complex cryogenic Arctic soils—soils which present multiple horizons sometimes with peat inclusions. The improved model allows us to prescribe the vertical heterogeneity of the soil hydrothermal properties. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75797
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: LSCE-IPSL, UMR 8212, CNRS-CEA-UVSQ, Orme des Merisiers, Gif-sur-Yvette, France; PRODIG, UMR 8586, Université Paris-Diderot, Paris, France; Ural Federal University, Yekaterinburg, Russian Federation
Recommended Citation:
Dantec-Nédélec S,, Ottlé C,, Wang T,et al. Testing the capability of ORCHIDEE land surface model to simulate Arctic ecosystems: Sensitivity analysis and site-level model calibration[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(2)