Silvia Viciani小组取得一项新突破。他们的论文发现了低温气体排放的量化揭示了蒙特塞拉特岛soufri山火山的二氧化碳通量被低估。

英国曼彻斯特大学Alexander Riddell团队发现蒙特塞拉特Soufrière Hills火山低温气体排放的量化显示，二氧化碳通量被低估。这一研究成果发表在2025年4月4日出版的《科学-进展》杂志上。

研究组对蒙特塞拉特Soufrière Hills火山的火山气体排放进行了直升机载光学MultiGAS测量，揭示了更大的富二氧化碳羽流中SO₂和HCl浓度的明显峰值。富含酸的浓度峰值与高温喷气孔的分布相匹配，而二氧化碳则主要从高温和低温喷气孔排放。来自热喷气孔的二氧化碳通量为每秒15至41公斤，而整个羽流的二氧化碳通量则为每秒61至131公斤。

将CO₂/SO₂比率乘以SO₂通量的典型CO₂通量计算将总CO₂通量低估了至少三倍。研究组量化了热液系统对大量岩浆气体的洗涤作用，损失了56%至79%的初始HCl和33%至68%的初始SO₂。这项研究强调了精确的酸性气体测量对检测非均匀脱气的重要性，并表明传统的二氧化碳通量测量可能大大低估了冷二氧化碳脱气的贡献，导致全球火山通量被低估。

附：英文原文

Title: Quantification of low-temperature gas emissions reveals CO2 flux underestimates at Soufrière Hills volcano, Montserrat

Author: Alexander Riddell, Mike Burton, Ben Esse, Brendan McCormick Kilbride, Antonio Chiarugi, Thomas Christopher, Francesco D’Amato, Graham A. Ryan, Adam Stinton, Silvia Viciani

Issue&Volume: 2025-04-04

Abstract: We performed helicopter-borne optical MultiGAS measurements of volcanic gas emissions from Soufrière Hills Volcano, Montserrat, revealing distinct spikes in SO2 and HCl concentrations within a larger CO2-rich plume. Acid-rich concentration spikes matched the distribution of high-temperature fumaroles, whereas CO2 is emitted broadly from high- and low-temperature fumaroles. The CO2 flux was 15 to 41 kilograms per second from hot fumaroles and 61 to 131 kilograms per second for the overall plume. The typical CO2 flux calculation of multiplying CO2/SO2 ratio with SO2 flux underestimates total CO2 flux by at least threefold. We quantified substantial magmatic gas scrubbing by the hydrothermal system, with 56 to 79% of initial HCl and 33 to 68% of initial SO2 lost. This study highlights the importance of precise acid-gas measurements for detecting heterogeneous degassing and suggests that traditional CO2 flux measurements may substantially underestimate contributions from cold CO2 degassing, leading to underestimated global volcanic fluxes.

DOI: ads8864

Source: https://www.science.org/doi/10.1126/sciadv.ads8864