The emissions of CO2 and other volatiles from the world's subaerial volcanoes
Artikel i vetenskaplig tidskrift, 2019

Volcanoes are the main pathway to the surface for volatiles that are stored within the Earth. Carbon dioxide (CO2) is of particular interest because of its potential for climate forcing. Understanding the balance of CO2 that is transferred from the Earth's surface to the Earth's interior, hinges on accurate quantification of the long-term emissions of volcanic CO2 to the atmosphere. Here we present an updated evaluation of the world's volcanic CO2 emissions that takes advantage of recent improvements in satellite-based monitoring of sulfur dioxide, the establishment of ground-based networks for semi-continuous CO2-SO2 gas sensing and a new approach to estimate key volcanic gas parameters based on magma compositions. Our results reveal a global volcanic CO2 flux of 51.3 +/- 5.7 Tg CO2/y (11.7 x 10(11) mol CO2/y) for non-eruptive degassing and 1.8 +/- 0.9 Tg/y for eruptive degassing during the period from 2005 to 2015. While lower than recent estimates, this global volcanic flux implies that a significant proportion of the surface-derived CO2 subducted into the Earth's mantle is either stored below the arc crust, is efficiently consumed by microbial activity before entering the deeper parts of the subduction system, or becomes recycled into the deep mantle to potentially form diamonds.

Författare

Tobias P. Fischer

University of New Mexico

Santiago Arellano

Chalmers, Rymd-, geo- och miljövetenskap, Mikrovågs- och optisk fjärranalys

Simon Carn

Michigan Technological University

Alessandro Aiuppa

Universita degli Studi di Palermo

Bo Galle

Chalmers, Rymd-, geo- och miljövetenskap, Mikrovågs- och optisk fjärranalys

Patrick Allard

Université Paris Descartes

Taryn Lopez

University of Alaska Fairbanks

Hiroshi Shinohara

AIST-NT Inc.

Peter Kelly

US Geol Survey, David A Johnston Cascades Volcano Observ

Cynthia Werner

US Geol Survey, David A Johnston Cascades Volcano Observ

Carlo Cardellini

Universita degli Studi di Perugia

Giovanni Chiodini

INGV

Scientific Reports

2045-2322 (ISSN)

Vol. 9 18716

Ämneskategorier

Annan geovetenskap och miljövetenskap

Naturgeografi

Multidisciplinär geovetenskap

DOI

10.1038/s41598-019-54682-1

PubMed

31822683

Mer information

Senast uppdaterat

2020-03-18