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长白山天池火山含碳气体排放特征

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查明火山气体释放的规模及空间分布特征,对火山监测与喷发预测、评估地质源温室气体释放及气候环境变化等具有重要意义.本文采用密闭气室法观测土壤气浓度,计算了长白山天池火山区CO2和CH4气体释放通量,结合高光谱气体CO和CO2分析了火山区不同区域气体释放特征及影响因素.结果表明:①长白山天池火山区土壤CO2通量范围为0.16～1051.39 g·m-2·d-1;CH4通量值范围为-0.05～4.68 g·m-2·d-1.长白山天池火山区气体释放在空间上呈环带状分布特征,火山口周缘气体释放较弱,在聚龙温泉群、锦江温泉群和锥体海拔1800～2 200 m范围内气体释放最为强烈.②长白山天池火山含碳气体释放在地表和高光谱卫星观测的时间和空间上都有一定的相关性,火山口上方气体释放最弱.③长白山天池火山含碳气体排放的空间差异可能受到火山口特殊条件、断裂构造、温泉地热储和岩浆作用的控制.
Characteristics of Carbonaceous Gas Emissions from Changbaishan Tianchi Volcano,Northeast China
Identifying the scale and spatial distribution characteristics of volcanic gas relea-ses is of great significance for volcano monitoring and eruption prediction,assessing green-house gas releases from geological sources,and understanding climate changes.This paper investigates the scale and spatial characterization of greenhouse gas release in the volcanic area of Changbaishan Tianchi using the accumulation chamber method and hyperspectral gas method.The results of the study showed that:① CO2 fluxes in the volcanic area of Changbaishan Tianchi were in the range of 0.16～1051.39 g·m-2·d-1;CH4 flux values were-0.05～4.68 g·m-2·d-1.The gas release from Changbaishan Tianchi volcano was spatially characterized by a ring-band distribution,with weaker gas release at the pe-riphery of the caldera,and the strongest gas release occurring in the Julong Hot Spring Group,Jinjiang Hot Spring Group,and the cone within the range of 1 800～2 200 m above sea level.② The surface and hyperspectral satellite observations of carbonaceous gases re-lease from Changbaishan Tianchi Volcano are correlated on both temporal and spatial scales.③ Spatial differences in carbonaceous gas emissions from Changbaishan Tianchi volcano may be controlled by the special conditions of the caldera,fault tectonics,hot spring geothermal reservoirs,and magmatism.

Changbaishan Tianchi volcanoGas fluxesHyperspectral gasSpatial char-acteristicsControlling factor

顾国辉、盘晓东、关升、仲广培、宋雨佳、胡乐、李营

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吉林省地震局吉林长白山火山国家野外科学观测研究站,吉林长春 130117

中国地震局火山研究所,吉林长春 130117

中国地震局地震预测研究所,北京 100036

长白山天池火山 气体通量 高光谱气体 空间特征 控制因素

地震科技星火计划项目地震科技星火计划项目吉林省科技发展计划项目吉林省地震局青年科技发展课题中国地震局地震预测研究所基本科研业务费专项

XH23013BXH23012B20230203132SFJZQ-202403CEAIEF20230205

2024

10.12196/j.issn.1000-3274.2024.03.013

地震
中国地震局地震预测研究所 中国地震学会地震预报专业委员会 中国地震学会地震流体专业委员会 中国地震学会地震电磁学专业委员会

地震

CSTPCD北大核心
影响因子：0.733
ISSN：1000-3274
年,卷(期)：2024.44(3)