DOI: 10.1016/j.palaeo.2013.08.009
论文题名: Modelling equable climates of the Late Cretaceous: Can new boundary conditions resolve data-model discrepancies?
作者: Hunter S.J. ; Haywood A.M. ; Valdes P.J. ; Francis J.E. ; Pound M.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 392 起始页码: 41
结束页码: 51
语种: 英语
英文关键词: Equable climates
; HadCM3
; Late Cretaceous
; Maastrichtian
英文摘要: Late Cretaceous (Maastrichtian) climate and vegetation is modelled using the HadCM3L fully-coupled atmosphere-ocean model and the TRIFFID dynamic vegetation model. We investigate data-model inconsistencies in the high-latitudes and continental interiors by exploring the sensitivity of modelled terrestrial climate to vegetation treatment, changing atmospheric pCO2 levels and the representation of Arctic seaway connections. We expand on previous work by using millennial-scale GCM runs with dynamic vegetation to allow for improved representations of ocean heat transport and terrestrial boundary conditions.Incorporating realistic vegetation drives high-latitude warming particularly during summer through reductions in surface albedo and induced atmosphere-ocean feedbacks. Resulting regional warming can exceed 10°C. As pCO2 rises some regions cool as deciduous to evergreen change increases albedo. Incorporating enhanced Arctic connectivity, reconfigured ocean heat transport drives widespread terrestrial warming of ~3°C and >5°C regionally. Applying sensitivities in combination significant palaeobotanical data-model inconsistencies in the northern high-latitudes and continental interiors remain. Further work is required to resolve climate and vegetation model deficiencies and improve the interpretation and geographic distribution of quantitative climate-sensitive geological proxies. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69557
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom; School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, United Kingdom; School of the Built and Natural Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, United Kingdom
Recommended Citation:
Hunter S.J.,Haywood A.M.,Valdes P.J.,et al. Modelling equable climates of the Late Cretaceous: Can new boundary conditions resolve data-model discrepancies?[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,392