气候变化领域集成服务门户(CCPortal): Lessons from a high-CO2 world: An ocean view from ∼3 million years ago

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DOI	10.5194/cp-16-1599-2020
	Lessons from a high-CO2 world: An ocean view from ∼3 million years ago
	McClymont E.L.; Ford H.L.; Ling Ho S.; Tindall J.C.; Haywood A.M.; Alonso-Garcia M.; Bailey I.; Berke M.A.; Littler K.; Patterson M.O.; Petrick B.; Peterse F.; Christina Ravelo A.; Risebrobakken B.; De Schepper S.; Swann G.E.A.; Thirumalai K.; Tierney J.E.; Van Der Weijst C.; White S.; Abe-Ouchi A.; Baatsen M.L.J.; Brady E.C.; Chan W.-L.; Chandan D.; Feng R.; Guo C.; Von Der Heydt A.S.; Hunter S.; Li X.; Lohmann G.; Nisancioglu K.H.; Otto-Bliesner B.L.; Richard Peltier W.; Stepanek C.; Zhang Z.
发表日期	2020
ISSN	18149324
起始页码	1599
结束页码	1615
卷号	16 期号:4
英文摘要	A range of future climate scenarios are projected for high atmospheric CO2 concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record offers an opportunity to understand climate system response to a range of forcings and feedbacks which operate over multiple temporal and spatial scales. Here, we examine a single interglacial during the late Pliocene (KM5c, ca. 3:205_0:01 Ma) when atmospheric CO2 exceeded pre-industrial concentrations, but were similar to today and to the lowest emission scenarios for this century. As orbital forcing and continental configurations were almost identical to today, we are able to focus on equilibrium climate system response to modern and near-future CO2. Using proxy data from 32 sites, we demonstrate that global mean sea-surface temperatures were warmer than pre-industrial values, by 2:3 C for the combined proxy data (foraminifera Mg=Ca and alkenones), or by 3:2 3.4 C (alkenones only). Compared to the preindustrial period, reduced meridional gradients and enhanced warming in the North Atlantic are consistently reconstructed. There is broad agreement between data and models at the global scale, with regional differences reflecting ocean circulation and/or proxy signals. An uneven distribution of proxy data in time and space does, however, add uncertainty to our anomaly calculations. The reconstructed global mean seasurface temperature anomaly for KM5c is warmer than all but three of the PlioMIP2 model outputs, and the reconstructed North Atlantic data tend to align with the warmest KM5c model values. Our results demonstrate that even under low-CO2 emission scenarios, surface ocean warming may be expected to exceed model projections and will be accentuated in the higher latitudes. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	carbon dioxide; concentration (composition); geological record; numerical model; orbital forcing; Pliocene; sea surface temperature; temperature anomaly; warming; Atlantic Ocean; Atlantic Ocean (North); Foraminifera
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146677
作者单位	Department of Geography, Durham University, Durham, DH1 3LE, United Kingdom; School of Geography, Queen Mary University of London, London, E1 4NS, United Kingdom; Institute of Oceanography, National Taiwan University, Taipei, 10617, Taiwan; School of Earth and Environment, University of Leeds, Leeds, LS29JT, United Kingdom; Department of Geology, University of Salamanca, Salamanca, Spain; CCMAR, Universidade Do Algarve, Faro, 8005-139, Portugal; Camborne School of Mines and Environment and Sustainability Institute, University of Exeter, Exeter, TR10 9FE, United Kingdom; Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46656, United States; Department of Geological Sciences and Environmental Studies, Binghamton University SUNY, 4400 Vestal Pkwy E, Binghamton, NY, United States; Climate Geochemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Department of Earth Sciences, Utrecht University, Utrecht, 3584 CB, Netherlan...
推荐引用方式 GB/T 7714	McClymont E.L.,Ford H.L.,Ling Ho S.,et al. Lessons from a high-CO2 world: An ocean view from ∼3 million years ago[J],2020,16(4).
APA	McClymont E.L..,Ford H.L..,Ling Ho S..,Tindall J.C..,Haywood A.M..,...&Zhang Z..(2020).Lessons from a high-CO2 world: An ocean view from ∼3 million years ago.Climate of the Past,16(4).
MLA	McClymont E.L.,et al."Lessons from a high-CO2 world: An ocean view from ∼3 million years ago".Climate of the Past 16.4(2020).