DOI: 10.1002/2014GB005079
Scopus记录号: 2-s2.0-84947127573
论文题名: Multicentury changes in ocean and land contributions to the climate-carbon feedback
作者: Randerson J ; T ; , Lindsay K ; , Munoz E ; , Fu W ; , Moore J ; K ; , Hoffman F ; M ; , Mahowald N ; M ; , Doney S ; C
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 6 起始页码: 744
结束页码: 759
语种: 英语
英文关键词: Atlantic meridional overturning circulation
; carbon-concentration feedback
; ecosystems
; net primary production
; stratification
Scopus关键词: anthropogenic source
; biogeochemical cycle
; carbon sequestration
; climate change
; concentration (composition)
; dissolved organic carbon
; greenhouse gas
; stratification
; terrestrial ecosystem
; tropical forest
; South America
英文摘要: Improved constraints on carbon cycle responses to climate change are needed to inform mitigation policy, yet our understanding of how these responses may evolve after 2100 remains highly uncertain. Using the Community Earth System Model (v1.0), we quantified climate-carbon feedbacks from 1850 to 2300 for the Representative Concentration Pathway 8.5 and its extension. In three simulations, land and ocean biogeochemical processes experienced the same trajectory of increasing atmospheric CO2. Each simulation had a different degree of radiative coupling for CO2 and other greenhouse gases and aerosols, enabling diagnosis of feedbacks. In a fully coupled simulation, global mean surface air temperature increased by 9.3 K from 1850 to 2300, with 4.4 K of this warming occurring after 2100. Excluding CO2, warming from other greenhouse gases and aerosols was 1.6 K by 2300, near a 2 K target needed to avoid dangerous anthropogenic interference with the climate system. Ocean contributions to the climate-carbon feedback increased considerably over time and exceeded contributions from land after 2100. The sensitivity of ocean carbon to climate change was found to be proportional to changes in ocean heat content, as a consequence of this heat modifying transport pathways for anthropogenic CO2 inflow and solubility of dissolved inorganic carbon. By 2300, climate change reduced cumulative ocean uptake by 330 Pg C, from 1410 Pg C to 1080 Pg C. Land fluxes similarly diverged over time, with climate change reducing stocks by 232 Pg C. Regional influence of climate change on carbon stocks was largest in the North Atlantic Ocean and tropical forests of South America. Our analysis suggests that after 2100, oceans may become as important as terrestrial ecosystems in regulating the magnitude of the climate-carbon feedback. © 2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78005
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth System Science, University of California, Irvine, CA, United States; National Center for Atmospheric Research, Boulder, CO, United States; Oak Ridge National Laboratory, Oak Ridge, TN, United States; Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Recommended Citation:
Randerson J,T,, Lindsay K,et al. Multicentury changes in ocean and land contributions to the climate-carbon feedback[J]. Global Biogeochemical Cycles,2015-01-01,29(6)