Records of organic carbon isotopic composition (δ13Corg) and volcanism linked to changes in atmospheric pCO2 and climate during the Late Paleozoic Icehouse
Records of organic carbon isotopic composition (δ13Corg) and volcanism linked to changes in atmospheric pCO2 and climate during the Late Paleozoic Icehouse
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晚古生代冰室期间与大气 pCO2 和气候变化相关的有机碳同位素组成 (δ13Corg) 和火山活动记录
DOI：
10.1016/j.gloplacha.2021.103654
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发表时间：
2021-12
影响因子：
3.9
通讯作者：
Jason Hilton
中科院分区：
文献类型：
--
作者：
鲁静;周凯;杨敏芳;张培新;邵龙义;Jason Hilton
晚古生代冰室（LPI）为气候-冰川-环境协同演化提供了一个深时间视角，并为未来气候和环境预测提供了潜在的见解。以往的研究大多将LPI期间的气候和环境变化归因于大气pCO 2的扰动，但pCO 2变化的驱动机制仍存在争议。虽然火山活动对环境和气候的影响已经得到承认，但其高分辨率的地质记录及其与大气pCO 2和气候变化的联系却很少报道。通过对华北地台格日期末至罗日期寒武纪地层的火山记录（Hg/TOC比值）和有机碳同位素组成（δ 13 Corg）的研究，探讨了这一问题。其中，δ 13 Corg负漂移期（Gzhelian晚期、Artinskian中期、Kungurian中期和Kungurian晚期）4个，正同位素平台期（Asselian和Roadian期）2个。四个负同位素漂移的每一个都与Hg/TOC比值的峰值和大气pCO 2的上升期相吻合。负同位素漂移和汞/总有机碳峰值的同时出现表明汞和碳循环扰动都是火山起源。这两个正同位素高原对应于冰川P1和气候过渡期冰川P3在澳大利亚和火山活动的弱时期。我们的研究结果提供了清晰的见解火山驱动扰动的环境，气候和碳循环在深的时间，并支持的主张，火山活动是足以改变全球气候从冰期间冰期通过温室气体排放在LPI。
The Late Paleozoic Icehouse (LPI) provides a deep-time perspective for climate-glaciation-environment coevolution and offers potential insights into future climatic and environmental predictions. Most previous studies attributed climatic and environmental changes during the LPI to perturbations of atmosphericpCO2, yet the driving mechanism forpCO2changes remains controversial. Although the environmental and climatic effects of volcanism have been recognized, its high-resolution geological records and links with changes in atmosphericpCO2and climate are rarely reported. We address this by investigating volcanic records (indicating by Hg/TOC ratio) and organic carbon isotope composition (δ13Corg) of paralic strata from the latest Gzhelian to Roadian stages in the North China Platform (NCP), China. Four δ13Corgnegative excursions (latest Gzhelian, middle Artinskian, middle Kungurian and latest Kungurian stages) and two positive isotope plateaus (Asselian and Roadian stages) are identified. Each of the four negative isotope excursions coincides with peaks in Hg/TOC ratio and rising periods of atmosphericpCO2. The co-occurrence of the negative isotope excursions and Hg/TOC peaks suggests volcanic origins for both the Hg and perturbations in the carbon cycle. The two positive isotope plateaus correspond to the glacial P1 and the climatic transition period to glacial P3 in Australia and to weak periods of volcanism. Our results provide clear insights into volcanism driving perturbations in environment, climate and the carbon cycle in deep time, and support the assertion that volcanism was sufficient to shift global climates from glacial to interglacial through greenhouse gas emissions during the LPI.
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影响因子：
1.8
作者：
A. Sato;E. J. Llambías;M. Basei;Carlos E. Castro
通讯作者：
A. Sato;E. J. Llambías;M. Basei;Carlos E. Castro
DOI：
10.1007/978-81-322-3962-8_5
发表时间：
2019-12
期刊：
Fundamentals of Invertebrate Palaeontology
影响因子：
--
作者：
Sreepat Jain
通讯作者：
Sreepat Jain
中国中二叠世的火山活动、生物大灭绝和碳同位素波动
影响因子：
56.9
作者：
Sun, Yadong;Lai, Xulong;Wignall, Paul B.;Ali, Jason R.;Jiang, Haishui;Vedrine, Stephanie;Bottrell, Simon H.;Newton, Robert J.;Izon, Gareth;Cope, Helen;Bond, David P. G.;Widdowson, Mike
通讯作者：
Widdowson, Mike
影响因子：
1
作者：
A. Biakov
通讯作者：
A. Biakov
华南二叠纪-石炭系台地碳酸盐地层和δ13C记录：对晚古生代冰室气候和冰室-温室转变的响应
DOI：
10.1016/j.palaeo.2016.07.038
发表时间：
2017-05
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Chao Liu;Emilia Jarochowska;Yuansheng Du
通讯作者：
Yuansheng Du