DOI: 10.1007/s00382-017-3883-7
Scopus记录号: 2-s2.0-85028851555
论文题名: How to reduce long-term drift in present-day and deep-time simulations?
作者: Brunetti M. ; Vérard C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-11-12 起始页码: 4425
结束页码: 4436
语种: 英语
英文关键词: Energy budget
; GCM
; Paleoclimate
; Tuning
Scopus关键词: atmospheric general circulation model
; boundary condition
; climate modeling
; computer simulation
; energy budget
; numerical model
; paleoclimate
; parameterization
; top of atmosphere
英文摘要: Climate models are often affected by long-term drift that is revealed by the evolution of global variables such as the ocean temperature or the surface air temperature. This spurious trend reduces the fidelity to initial conditions and has a great influence on the equilibrium climate after long simulation times. Useful insight on the nature of the climate drift can be obtained using two global metrics, i.e. the energy imbalance at the top of the atmosphere and at the ocean surface. The former is an indicator of the limitations within a given climate model, at the level of both numerical implementation and physical parameterisations, while the latter is an indicator of the goodness of the tuning procedure. Using the MIT general circulation model, we construct different configurations with various degree of complexity (i.e. different parameterisations for the bulk cloud albedo, inclusion or not of friction heating, different bathymetry configurations) to which we apply the same tuning procedure in order to obtain control runs for fixed external forcing where the climate drift is minimised. We find that the interplay between tuning procedure and different configurations of the same climate model provides crucial information on the stability of the control runs and on the goodness of a given parameterisation. This approach is particularly relevant for constructing good-quality control runs of the geological past where huge uncertainties are found in both initial and boundary conditions. We will focus on robust results that can be generally applied to other climate models. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109259
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: GAP-Climate, Institute for Environmental Sciences, University of Geneva, 66 Bd Carl-Vogt, Geneva, 1205, Switzerland; Climatic Change and Climate Impacts Group, Institute for Environmental Sciences, University of Geneva, 66 Bd Carl-Vogt, Geneva, 1205, Switzerland
Recommended Citation:
Brunetti M.,Vérard C.. How to reduce long-term drift in present-day and deep-time simulations?[J]. Climate Dynamics,2018-01-01,50(2018-11-12)