DOI: 10.1002/2015GL064903
论文题名: How well do simulated last glacial maximum tropical temperatures constrain equilibrium climate sensitivity?
作者: Hopcroft P.O. ; Valdes P.J.
刊名: Geophysical Research Letters
ISSN: 0094-9503
EISSN: 1944-9234
出版年: 2015
卷: 42, 期: 13 起始页码: 5533
结束页码: 5539
语种: 英语
英文关键词: cloud radiative effects
; CMIP5
; Earth System
; feedbacks
; LGM
Scopus关键词: Aerosols
; Atmospheric radiation
; Climate change
; Earth (planet)
; Feedback
; Glacial geology
; Tropics
; Vegetation
; Cloud radiative effects
; CMIP5
; Coupled Model Intercomparison Project
; Earth systems
; LGM
; Paleoclimate modelling
; Surface air temperatures
; Tropical temperatures
; Climate models
; air temperature
; climate modeling
; cloud radiative forcing
; cooling
; future prospect
; Last Glacial Maximum
; paleoclimate
; radiative forcing
英文摘要: Previous work demonstrated a significant correlation between tropical surface air temperature and equilibrium climate sensitivity (ECS) in PMIP (Paleoclimate Modelling Intercomparison Project) phase 2 model simulations of the last glacial maximum (LGM). This implies that reconstructed LGM cooling in this region could provide information about the climate system ECS value. We analyze results from new simulations of the LGM performed as part of Coupled Model Intercomparison Project (CMIP5) and PMIP phase 3. These results show no consistent relationship between the LGM tropical cooling and ECS. A radiative forcing and feedback analysis shows that a number of factors are responsible for this decoupling, some of which are related to vegetation and aerosol feedbacks. While several of the processes identified are LGM specific and do not impact on elevated CO2 simulations, this analysis demonstrates one area where the newer CMIP5 models behave in a qualitatively different manner compared with the older ensemble. The results imply that so-called Earth System components such as vegetation and aerosols can have a significant impact on the climate response in LGM simulations, and this should be taken into account in future analyses. Key Points New LGM simulations show no tropical temperature to climate sensitivity relation This is caused by a model complexity, especially due to Earth System components It is unclear how inferred ECS will change as more model components are included. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938118156&doi=10.1002%2f2015GL064903&partnerID=40&md5=6474069232694aa11b21e10120de9f95
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9118
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Bristol Research Initiative for the Dynamic Global Environment, School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
Recommended Citation:
Hopcroft P.O.,Valdes P.J.. How well do simulated last glacial maximum tropical temperatures constrain equilibrium climate sensitivity?[J]. Geophysical Research Letters,2015-01-01,42(13).