Sulfur budget and global climate impact of the A.D. 1835 eruption of Cosiguina volcano, Nicaragua
Sulfur budget and global climate impact of the A.D. 1835 eruption of Cosiguina volcano, Nicaragua
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DOI：
10.1002/2014gl061205
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发表时间：
2014-10-16
影响因子：
5.2
通讯作者：
Kutterolf, Steffen
中科院分区：
文献类型：
--
作者：
Longpre, Marc-Antoine;Stix, John;Kutterolf, Steffen
大规模的火山喷发会将大量的硫磺气体注入地球大气层，从而影响全球气候。 1835 年 1 月尼加拉瓜科西吉纳火山的喷发是美洲历史上规模最大、爆炸性最强的火山喷发之一，但它是否对全球气候产生了影响仍不清楚。对科西尼亚矿床的新岩石学分析表明，这次喷发释放出足够的硫，可以解释大约公元 1835 年北极和南极冰芯中明显的硫酸盐异常现象。对温度敏感的年轮年表的汇编表明，由于火山喷发，地球表面明显变冷，这与仪器温度记录一致。我们得出的结论是，这次喷发是过去几个世纪最重要的硫磺产生事件之一，其对气候的影响相当大，可与 1991 年皮纳图博火山喷发的影响相媲美。
Large explosive volcanic eruptions can inject massive amounts of sulfuric gases into the Earth's atmosphere and, in so doing, affect global climate. The January 1835 eruption of Cosiguina volcano, Nicaragua, ranks among the Americas' largest and most explosive historical eruptions, but whether it had effects on global climate remains ambiguous. New petrologic analyses of the Cosigna deposits reveal that the eruption released enough sulfur to explain a prominent circa A. D. 1835 sulfate anomaly in ice cores from both the Arctic and Antarctic. A compilation of temperature-sensitive tree ring chronologies indicates appreciable cooling of the Earth's surface in response to the eruption, consistent with instrumental temperature records. We conclude that this eruption represents one of the most important sulfur- producing events of the last few centuries and had a sizable climate impact rivaling that of the 1991 eruption of Mount Pinatubo.