Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China
Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China
复制标题
四川古盆地早侏罗世气候与大气CO2浓度
DOI：
10.5194/cp-16-2055-2020
复制
发表时间：
2020-11
影响因子：
4.3
通讯作者：
张朝凯
中科院分区：
文献类型：
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作者：
李祥辉;王旌羽;Rasbury Troy;周敏;魏震;张朝凯
抽象的。气候振荡是通过（早期）
侏罗纪从海洋沉积档案，但仍不清楚，
地球记录这项工作提出了气候敏感的调查，
湖相和成壤相沉积物及碳氧同位素分析
早侏罗世自流井组的碳酸盐岩。沉积和稳定同位素代用指标
这表明，四川的气候总体上是长期（半）干旱的
盆地
早侏罗世，除了Hettangian。这种气候模式是
类似于西北部科罗拉多高原地区的干旱气候
与中国北方相对温暖湿润的气候不同
在南半球的高纬度地区。大气CO2的估计值
成土碳酸盐的碳同位素浓度（pCO 2）表明，
范围为980-2610 ppmv（工业化前的3.5-10倍）
平均值为1660 ppmv。pCO 2的三个阶段（
Sinemurian 1500-2000 ppmv，Pliensbachian 1000-1500 ppmv，以及早期
Toarcian 1094-2610 ppmv）和两起pCO 2迅速下降事件，
观察到约1000-1300 ppmv，说明pCO 2
早侏罗世的扰动pCO 2的扰动是
与同时代海洋的海水温度和碳循环相容
沉积物，表明气候的正反馈pCO 2通过早侏罗世。
Abstract. Climatic oscillations have been developed through the (Early)
Jurassic from marine sedimentary archives but remain unclear from
terrestrial records. This work presents investigation of climate-sensitive
sediments and carbon and oxygen isotope analyses of lacustrine and pedogenic
carbonates for the Early Jurassic Ziliujing Formation taken from the Basin in southwestern China. Sedimentary and stable isotope proxies
manifest that an overall secular (semi)arid climate dominated the Sichuan
Basin
during the Early Jurassic, except for the Hettangian. This climate pattern is
similar to the arid climate in the Colorado Plateau region in western North
America but is distinct from the relatively warm and humid climate in northern China
and at high latitudes in the Southern Hemisphere. The estimated atmospheric CO2
concentration (pCO2) from carbon isotopes of pedogenic carbonates shows
a range of 980–2610 ppmv (∼3.5–10 times the pre-industrial
value) with a mean of 1660 ppmv. Three phases of pCO2 (the
Sinemurian 1500–2000 ppmv, the Pliensbachian 1000–1500 ppmv, and the early
Toarcian 1094–2610 ppmv) and two events of pCO2 rapidly falling by
∼1000–1300 ppmv are observed, illustrating the pCO2
perturbation in the Early Jurassic. The perturbation of pCO2 is
compatible with seawater temperature and carbon cycle from the coeval marine
sediments, suggesting a positive feedback of climate to pCO2 through the Early Jurassic.
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影响因子：
1.3
作者：
Spence J;Casale A;Assmann T;Liebherr JK;Penev L
通讯作者：
Penev L
DOI：
10.1017/9781108892858.001
发表时间：
2020-09
期刊：
The European Monetary Union
影响因子：
--
作者：
通讯作者：
--
影响因子：
2.6
作者：
Neri C
通讯作者：
Neri C
影响因子：
1.5
作者：
Georges Zaccour
通讯作者：
Georges Zaccour
影响因子：
5.2
作者：
通讯作者：
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