气候变化领域集成服务门户(CCPortal): Influence of temporally varying weatherability on CO2-climate coupling and ecosystem change in the late Paleozoic

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DOI	10.5194/cp-16-1759-2020
	Influence of temporally varying weatherability on CO2-climate coupling and ecosystem change in the late Paleozoic
	Richey J.D.; Montañez I.P.; Goddéris Y.; Looy C.V.; Griffis N.P.; Dimichele W.A.
发表日期	2020
ISSN	18149324
起始页码	1759
结束页码	1775
卷号	16 期号:5
英文摘要	Earth's penultimate icehouse period, the late Paleozoic ice age (LPIA), was a time of dynamic glaciation and repeated ecosystem perturbation, which was under conditions of substantial variability in atmospheric pCO2 and O2. Improved constraints on the evolution of atmospheric pCO2 and O2=CO2 ratios during the LPIA and its subsequent demise to permanent greenhouse conditions are crucial for better understanding the nature of linkages between atmospheric composition, climate, and ecosystem perturbation during this time. We present a new and age-recalibrated pCO2 reconstruction for a 40 Myr interval (313 to 273 Ma) of the late Paleozoic that (1) confirms a previously hypothesized strong CO2-glaciation linkage, (2) documents synchroneity between major pCO2 and O2=CO2 changes and compositional turnovers in terrestrial and marine ecosystems, (3) lends support for a modeled progressive decrease in the CO2 threshold for initiation of continental ice sheets during the LPIA, and (4) indicates a likely role of CO2 and O2=CO2 thresholds in floral ecologic turnovers. Modeling of the relative role of CO2 sinks and sources active during the LPIA and its demise on steady-state pCO2 using an intermediate-complexity climate-carbon cycle model (GEOCLIM) and comparison to the new multi-proxy CO2 record provides new insight into the relative influences of the uplift of the Central Pangean Mountains, intensifying aridification, and increasing mafic rock to granite rock ratio of outcropping rocks on the global efficiency of CO2 consumption and secular change in steady-state pCO2 through the late Paleozoic. © Author(s) 2020.
语种	英语
scopus关键词	carbon dioxide; climate variation; paleoclimate; paleoenvironment; Paleozoic; temporal variation
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/146670
作者单位	Department of Earth and Planetary Sciences, University of California, Davis, CA 95616, United States; CNRS-Université Paul Sabatier, Geósciences Environnement Toulouse, Toulouse, France; Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, CA 94720, United States; Berkeley Geochronology Center, Berkeley, CA 94720, United States; Department of Paleobiology, Smithsonian Museum of Natural History, Washington, DC, 20560, United States
推荐引用方式 GB/T 7714	Richey J.D.,Montañez I.P.,Goddéris Y.,et al. Influence of temporally varying weatherability on CO2-climate coupling and ecosystem change in the late Paleozoic[J],2020,16(5).
APA	Richey J.D.,Montañez I.P.,Goddéris Y.,Looy C.V.,Griffis N.P.,&Dimichele W.A..(2020).Influence of temporally varying weatherability on CO2-climate coupling and ecosystem change in the late Paleozoic.Climate of the Past,16(5).
MLA	Richey J.D.,et al."Influence of temporally varying weatherability on CO2-climate coupling and ecosystem change in the late Paleozoic".Climate of the Past 16.5(2020).