Synoptic analysis of a decade of daily measurements of SO2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and Atmospheric Change

• DOI: 10.5194/essd-13-1167-2021
• Publication Date: 2021-03-22T10:28:53Z
• Authors: Santiago Arellano; Bo Galle; Fredy Apaza; Geoffroy Avard; Charlotte Barrington; Nicole Bobrowski; Claudia Bucarey; Viviana Burbano; Mike Burton; Zoraida Chacón; Gustavo Chigna; Christian Joseph ...; Vladimir Conde; Fidel Costa; Maarten De Moor; Hugo Delgado-Gran...; Andrea Di Muro; Deborah Fernandez; Gustavo Garzón; Hendra Gunawan; Nia Haerani; Thor H. Hansteen; Silvana Hidalgo; Salvatore Inguagg...; Mattias Johansson; Christoph Kern; Manne Kihlman; Philippe Kowalski; Pablo Masias; Francisco Montalvo; Joakim Möller; Ulrich Platt; Claudia Rivera; Armando Saballos; Giuseppe Salerno; Benoit Taisne; Freddy Vásconez; Gabriela Velásquez; Fabio Vita; Mathieu Yalire
• Keywords: Volcanic Gases; Trace gas

Abstract. Volcanic plumes are common and far-reaching manifestations of volcanic activity during between eruptions. Observations the rate emission composition essential to recognize and, in some cases, predict state activity. Measurements size location important assess impact from sporadic or localized events persistent widespread processes climatic environmental importance. These observations provide information on volatile budgets Earth, chemical evolution magmas, atmospheric circulation dynamics. Space-based last decades have given us a global view Earth's emission, particularly sulfur dioxide (SO2). Although none satellite missions were intended be used for measurement gas specially adapted algorithms produced time-averaged budgets. confirmed that tropospheric plumes, degassing weak sources, dominate total SO2. space-based provided this insight into aspects volcanism, it still has limitations. The magnitude short-term variability lower-atmosphere emissions, historically less accessible space, remain largely uncertain. Operational monitoring at scales relevant adequate surveillance, been facilitated through use ground-based scanning differential optical absorption spectrometer (ScanDOAS) instruments since beginning century, due coordinated effort Network Observation Atmospheric Change (NOVAC). In study, we present compilation results homogenized post-analysis measurements SO2 flux plume parameters obtained period March 2005 January 2017 32 volcanoes NOVAC. This inventory opens window patterns diverse set terms magma composition, geographical location, style eruptive We find passive is by no means stationary process time large sub-daily observed gases, which implications using short-term, observations. standard evaluation method allows intercomparison different ground- same volcanoes. several weakly volcanoes, undetected satellites, presented first time. also compare our with those reported literature, providing ranges not past. open-access data repository introduced article will enable further exploitation unique dataset, focus volcanological research, risk assessment, satellite-sensor validation, improved quantification prevalent component emission. Datasets each volcano made available https://novac.chalmers.se (last access: 1 October 2020) under CC-BY 4 license DOI (digital object identifier) links Table 1.