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Sulphur dioxide from volcanic emissions |
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Tropospheric
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monitoring |
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monitoring |
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monitoring |
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Aviation control |
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volcanic plume
- near-real-time & archive data |
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09 July 2009
Volcano eruptions are important sources of gases, such as sulphur dioxide (SO2), and volcanic ash (aerosols) in the atmosphere. These emissions may have an impact on air traffic and therefore it is useful to monitor these compounds: near-real time information on the emissions of volcanic ash and sulphur dioxide will enable better planning of air line routes.
For the Service, a set of geographic regions covering known volcanoes has been defined and each of these regions is monitored. Concentrations of SO2 are derived from UV measurements by satellite based instruments. If the concentrations in a given region exceed a limit, a warning is issued of a possible volcano eruption.
Near-real-time results from
SCIAMACHY, OMI and GOME-2
- Daily data at orbit
coordinates
- Notification of
exceptional SO2 concentrations
[based on SCIAMACHY only for the moment]
Archive & automatic e-mail service
Archive of data from
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SO2 concentrations as measured by the GOME-2 instrument on 10 August 2008 south of Alaska. The SO2 was released by the Kasatochi volcano, which erupted late in the evening of 7 August. |
Additional information
- On-line product
information
- Overview
of the default regions defined for the Service and the volcanoes in
these regions
- SO2
from the eruption of the Kasatochi volcano (Aleutian Islands)
in August is transported rapidly across the Northern Hemisphere:- MPEG movie of SO2 from OMI data on a rotating Earth (3.4MB)
- Animated GIF of SO2 from both
GOME-2 and OMI in cylindrical
projection (2.7MB); note that GOME-2 measures about 4 hours
before OMI does
- Highlights of SO2 emissions related to volcanic eruptions:
- Kasatochi volcano on the Aleutian Islands -- August 2008
- Piton de la Fournaise volcano on Réunion Island -- March/April 2007
- Grímsvötn volcano on Iceland -- November 2004
- Document Sulphur dioxide monitoring within TEMIS corresponding to version 0.9 of this Data Service, and delivered on 29 November 2006.
Related information
- General
background information
- Links to
related projects, such as NOVAC, GlobVolcano, SAVAA, ...
- Links to volcano related websites