globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.03.035
Scopus记录号: 2-s2.0-85044566995
论文题名:
Changes in CO2 during Ocean Anoxic Event 1d indicate similarities to other carbon cycle perturbations
作者: Richey J.D.; Upchurch G.R.; Montañez I.P.; Lomax B.H.; Suarez M.B.; Crout N.M.J.; Joeckel R.M.; Ludvigson G.A.; Smith J.J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 491
起始页码: 172
结束页码: 182
语种: 英语
英文关键词: carbon cycle perturbation ; Lauraceae ; mid-Cretaceous pCO2 ; Ocean Anoxic Event ; stomata
Scopus关键词: Carbon ; Charcoal ; Climate change ; Earth (planet) ; Greenhouse gases ; Anoxic events ; Carbon cycles ; Lauraceae ; Mid-Cretaceous ; stomata ; Carbon dioxide ; angiosperm ; carbon cycle ; carbon dioxide ; climate variation ; Cretaceous ; greenhouse gas ; isotopic composition ; paleoclimate ; proxy climate record ; reconstruction ; stomata ; stratigraphic boundary ; Lauraceae
英文摘要: Past greenhouse intervals of the Mesozoic were repeatedly punctuated by Ocean Anoxic Events (OAEs), major perturbations to the global carbon cycle and abrupt climate changes that may serve as relevant analogs for Earth's greenhouse gas-forced climate future. The key to better understanding these transient climate disruptions and possible CO2-forced tipping-points resides in high-resolution, precise, and accurate estimates of atmospheric CO2 for individual OAEs. Here we present a high-temporal resolution, multi-proxy pCO2 reconstruction for the onset of mid-Cretaceous (Albian–Cenomanian Boundary) OAE1d. Coupling of pCO2 estimates with carbon isotopic compositions (δ13C) of charcoal, vitrain, and cuticle from the Rose Creek Pit (RCP), Nebraska, reveals complex phasing, including a lag between the well-documented negative δ13C excursion defining the onset of OAE1d and the CO2 increase. This lag indicates that increased CO2 or other C-based greenhouse gases may not have been the primary cause of the negative excursion. Our study reveals a pCO2 increase within the interval of the negative δ13C excursion, reaching a maximum of up to ∼840 ppm (95% confidence interval −307 ppm/+167 ppm) toward its end. The reconstructed magnitude of CO2 increase (∼357 ppm) is similar to that of Late Cretaceous OAE2 but of smaller magnitude than that of other major carbon cycle perturbations of the Mesozoic assessed via stomatal methods (e.g., the Toarcian OAE [TOAE], Triassic–Jurassic boundary event, Cretaceous–Paleogene Boundary event). Furthermore, our results indicate a possible shared causal or developmental mechanism with OAE1a and the TOAE. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109916
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Biology, Texas State University, 601 University Dr., San Marcos, TX 78666, United States; Department of Earth and Planetary Sciences, University of California, Davis, 1 Shields Ave., Davis, CA 95616, United States; The School of Biosciences, Division of Agricultural and Environmental Sciences, The University of Nottingham, Sutton Bonington Campus, Sutton BoningtonLeicestershire LE12 5RD, United Kingdom; Department of Geological Sciences, The University of Texas at San Antonio, 1 UTSA Circle, San Antonio, TX 78249, United States; Conservation and Survey Division, School of Natural Resources, Department of Earth and Atmospheric Sciences, University of Nebraska State Museum, The University of Nebraska-Lincoln, 3310 Holdrege St., Lincoln, NE 68583-0996, United States; Kansas Geological Survey, The University of Kansas, 1930 Constant Ave., Lawrence, KS 66047, United States; Department of Earth and Planetary Sciences, University of California, Davis, 1 Shields Ave., Davis, CA 95616, United States

Recommended Citation:
Richey J.D.,Upchurch G.R.,Montañez I.P.,et al. Changes in CO2 during Ocean Anoxic Event 1d indicate similarities to other carbon cycle perturbations[J]. Earth and Planetary Science Letters,2018-01-01,491
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