火山区温室气体释放通量的测量及其成因研究已经成为当今国际火山学界探测深部岩浆囊的活动性和预测火山未来喷发最有效的方法之一，同时也是研究火山区向大气圈释放温室气体规模的重要手段。长白山天池火山的地下深部存在岩浆囊，地表水热活动强烈，是我国最具潜在喷发危险性的巨型休眠火山。本项目拟在天池火山区开展长时间尺度、连续的温室气体释放通量测量、火山气体取样和测试工作，以定量地估算天池火山的温室气体释放规模、揭示温室气体的来源与成因，并探讨温室气体通量与气体成分的变化特征及其与天池火山深部岩浆囊活动性之间的联系，为监测天池火山的活动状态和估算其温室气体释放规模提供科学依据。

Quantitative and qualitative study on fluxes and origin of greenhouse gases emitting from volcanic fields has become one of the most effective proxies for monitoring activities of deep-seated magma chamber and forecasting potential future eruptions of active volcanoes, which could also serve as important method for evaluating to what extent greenhouse gases released by volcanoes contribute to the atmosphere. Tianchi volcano, although quiescent at present, is undoubtedly the largest and most dangerous active volcano with potential threat of future eruption in China, as indicated by the magma chamber beneath the Tianchi volcanic cone and intensive hydrothermal activities. This proposal will focus on long-term and continuous study on fluxes, compositions and origin of greenhouse gases released by Tianchi volcano, aiming to quantitatively calculate fluxes of greenhouses at Tianchi volcano and reveal genesis of volcanic degassing. Furthermore, the potential links between activities of deep-seated magma chamber and temporal variations of greenhouse gas fluxes and gas compositions will be investigated, which could provide scientific evidence for effectively evaluating activities of deep-seated magma chamber and quantitatively estimating scale of greenhouse gases emitting from Tianchi volcano.