DOI: 10.1175/JCLI-D-13-00452.1
Scopus记录号: 2-s2.0-84901827738
论文题名: Nonlinearity of ocean carbon cycle feedbacks in CMIP5 earth system models
作者: Schwinger J. ; Tjiputra J.F. ; Heinze C. ; Bopp L. ; Christian J.R. ; Gehlen M. ; Ilyina T. ; Jones C.D. ; Salas-Mélia D. ; Segschneider J. ; Séférian R. ; Totterdell I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 11 起始页码: 3869
结束页码: 3888
语种: 英语
Scopus关键词: Carbon dioxide
; Climate change
; Climate models
; Feedback
; Oceanography
; Sea ice
; Carbon transport
; Coupled Model Intercomparison Project
; Coupled simulation
; Earth system model
; Feedback process
; Ocean carbon cycle
; Ocean circulation
; Sea ice retreats
; Carbon
; atmospheric chemistry
; atmospheric deposition
; atmospheric transport
; carbon cycle
; carbon emission
; carbon flux
; climate change
; climate feedback
; concentration (composition)
; oceanic circulation
英文摘要: Carbon cycle feedbacks are usually categorized into carbon-concentration and carbon-climate feedbacks, which arise owing to increasing atmospheric CO2 concentration and changing physical climate. Both feedbacks are often assumed to operate independently: that is, the total feedback can be expressed as the sumof two independent carbon fluxes that are functions of atmospheric CO2 and climate change, respectively. For phase 5 of the Coupled Model Intercomparison Project (CMIP5), radiatively and biogeochemically coupled simulations have been undertaken to better understand carbon cycle feedback processes. Results show that the sum of total ocean carbon uptake in the radiatively and biogeochemically coupled experiments is consistently larger by 19-58 petagrams of carbon (Pg C) than the uptake found in the fully coupledmodel runs. This nonlinearity is small compared to the total ocean carbon uptake (533-676 Pg C), but it is of the same order as the carbon-climate feedback. The weakening of ocean circulation andmixing with climate change makes the largest contribution to the nonlinear carbon cycle response since carbon transport to depth is suppressed in the fully relative to the biogeochemically coupled simulations, while the radiatively coupled experimentmainlymeasures the loss of near-surface carbon owing to warming of the ocean. Sea ice retreat and seawater carbon chemistry contribute less to the simulated nonlinearity. The authors' results indicate that estimates of the ocean carbon-climate feedback derived from''warming only'' (radiatively coupled) simulations may underestimate the reduction of ocean carbon uptake in a warm climate high CO2 world. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51274
Appears in Collections: 气候变化事实与影响
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作者单位: Geophysical Institute, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway; Uni Climate, Uni Research AS, Bergen, Norway; Laboratoire des Sciences du Climat et de l'Environnement, Gif sur Yvette, Toulouse, France; Canadian Centre for Climate Modelling and Analysis, Victoria, BC, Canada; Max Planck Institute for Meteorology, Hamburg, Germany; Met Office Hadley Centre, Exeter, United Kingdom; Centre National de Recherches Météorologiques, Météo-France, Toulouse, France
Recommended Citation:
Schwinger J.,Tjiputra J.F.,Heinze C.,et al. Nonlinearity of ocean carbon cycle feedbacks in CMIP5 earth system models[J]. Journal of Climate,2014-01-01,27(11)