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温泉是深部岩浆活动在地表的直接表现,并且向大气圈排放大量的温室气体。然而,国内尚无火山区温泉排放的温室气体通量研究报道。我国长白山火山区水热活动强烈,主要有湖滨温泉带、聚龙温泉群、锦江温泉以及火山口外围的十八道沟温泉。本文利用数字皂膜流量计测量温泉气体排放通量,并结合前人对长白山火山区温泉气体成分的研究成果,估算了研究区温泉所排放的温室气体通量。结果表明,长白山火山区温泉排放的CO2通量为6.9×104t·a-1,CH4排放通量为428.44t·a-1,与意大利PantelleriaIsland火山区温泉排放的温室气体通量规模相当。本文的测试结果表明:数字皂膜流量计在火山区温室气体排放通量估算研究中的应用是可行的。
Hot springs are a direct manifestation of deep magmatic activity on the surface and emit large amounts of greenhouse gases into the atmosphere. However, there is still no greenhouse gas flux in volcanic area in China. Hydrothermal activities in Changbai Mountain volcano area in China are intense with the main features of Hubin Spa Zone, Julong Hot Springs Group, Jinjiang Hot Springs and the Shibasha Gou Hot Spring at the periphery of the crater. In this paper, digital soap film flowmeters were used to measure the discharge fluxes of hot spring gas. Based on the previous research results of the hot spring gas components in the volcanic area of Changbai Mountain, the greenhouse gas fluxes from hot springs in the study area were estimated. The results show that the discharge flux of Changbai Mountain volcanic hot spring is 6.9 × 104t · a-1, and the emission flux of CH4 is 428.44t · a-1, which is similar to the greenhouse gas flux emitted by Hot Springs in the Islander volcanic region of Pantelleria in Italy. The test results show that the digital soap film flowmeter in volcanic area greenhouse gas emissions flux estimation study is feasible.