菲律宾塔阿尔火山2020年1月喷发的弥散性一氧化碳脱气前兆。

Diffuse CO degassing precursors of the January 2020 eruption of Taal volcano, Philippines.

作者信息

Pérez Nemesio M, Melián Gladys V, Hernández Pedro A, Padrón Eleazar, Padilla Germán D, Baldago Ma Criselda, Barrancos José, Rodríguez Fátima, Asensio-Ramos María, Alonso Mar, Arcilla Carlo, Lagmay Alfredo Mahar

机构信息

Instituto Volcanológico de Canarias (INVOLCAN), 38320, San Cristobal de La Laguna, Tenerife, Canary Islands, Spain.

Instituto Tecnológico y de Energías Renovables (ITER), 38600, Granadilla de Abona, Tenerife, Canary Islands, Spain.

出版信息

Sci Rep. 2022 Nov 9;12(1):19091. doi: 10.1038/s41598-022-22066-7.

DOI:10.1038/s41598-022-22066-7

PMID:36351952

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9646843/

Abstract

On January 12, 2020, Taal volcano in Philippines erupted, 43 years after its previous eruption in 1977. This eruption was preceded by diffuse CO degassing precursory signals. Significant temporal variations in diffuse CO emission from Taal Main Crater Lake (TMLC) were observed across the ~ 12 years reaching high CO degassing rates in 2011 and 2017, with values typical of plume degassing volcanoes. In addition to these CO surveys at the TCML, soil CO efflux continuous monitoring was implemented at Taal volcano since 2016 and a clear increasing trend of the soil CO efflux in 2017 was observed. These geochemical observations are most simply explained by magma recharge to the system, and represent the earliest warning precursor signals to the January 2020 eruptive activity.

摘要

2020年1月12日，菲律宾的塔尔火山爆发，距离其上次1977年喷发已有43年。此次喷发之前出现了弥散性一氧化碳脱气的前兆信号。在约12年的时间里，观察到塔尔主火山口湖（TMLC）的弥散性一氧化碳排放存在显著的时间变化，在2011年和2017年达到了高一氧化碳脱气率，其值为羽流脱气火山的典型值。除了在塔尔主火山口湖进行这些一氧化碳测量外，自2016年以来还在塔尔火山实施了土壤一氧化碳通量的连续监测，并观察到2017年土壤一氧化碳通量有明显的上升趋势。这些地球化学观测结果最简单的解释是系统有岩浆补给，并且代表了2020年1月火山喷发活动的最早预警前兆信号。