Global monitoring of volcanic SO2 degassing with unprecedented resolution from TROPOMI onboard Sentinel-5 Precursor

Scientific Reports
Nicolas TheysM Van Roozendael

Abstract

Over the last four decades, space-based nadir observations of sulfur dioxide (SO2) proved to be a key data source for assessing the environmental impacts of volcanic emissions, for monitoring volcanic activity and early signs of eruptions, and ultimately mitigating related hazards on local populations and aviation. Despite its importance, a detailed picture of global SO2 daily degassing is difficult to produce, notably for lower-tropospheric plumes, due largely to the limited spatial resolution and coverage or lack of sensitivity and selectivity to SO2 of current (and previous) nadir sensors. We report here the first volcanic SO2 measurements from the hyperspectral TROPOspheric Monitoring Instrument (TROPOMI) launched in October 2017 onboard the ESA's Sentinel-5 Precursor platform. Using the operational processing algorithm, we explore the benefit of improved spatial resolution to the monitoring of global volcanic degassing. We find that TROPOMI surpasses any space nadir sensor in its ability to detect weak degassing signals and captures day-to-day changes in SO2 emissions. The detection limit of TROPOMI to SO2 emissions is a factor of 4 better than the heritage Aura/Ozone Monitoring Instrument (OMI). Here we show that TROPOMI ...Continue Reading

References

Mar 10, 2017·Scientific Reports·S A CarnN A Krotkov
Feb 1, 2019·Scientific Reports·Manuel QueißerRyunosuke Kazahaya

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Citations

Feb 1, 2019·Scientific Reports·Manuel QueißerRyunosuke Kazahaya
Feb 29, 2020·Scientific Reports·A T PrataA Costa
Dec 8, 2020·The Science of the Total Environment·Brock A EdwardsFeiyue Wang
Nov 11, 2021·Environmental Science and Pollution Research International·Mohamed HereherAhmed M El Kenawy

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Software Mentioned

OMI
TROPOMI
S5P
TROPOMI SO
TOMS
SEVIRI
NOVAC
ASTER

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