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| Titel |
A multi-sensor alert system for volcanic emissions using satellite SO2 and ash measurements |
| VerfasserIn |
Nicolas Theys, Hugues Brenot, Jeroen van Gent, Michel Van Roozendael, Ronald van der A, Lieven Clarisse, Daniel Hurtmans, Yasmine Ngadi, Pierre Coheur, Cathy Clerbaux |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250047514
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| Zusammenfassung |
| Hosted by the Belgian Institute for Space Aeronomy, the “Support to Aviation Control
Service” (SACS) is an ESA-funded project aiming at providing Volcanic Ash Advisory
Centers (VAACs) with near real-time global SO2 and volcanic ash data derived from
current atmospheric chemistry space sensors. SACS relies on the combined use of
UV-visible (SCIAMACHY, OMI, GOME-2) and infrared (AIRS, IASI) satellite
instruments which are used to monitor and detect gas and ash emissions from volcanoes
worldwide. Whenever unusually high emissions are detected, the service issues an
alert that takes the form of a notification sent by e-mail to interested parties. This
notification also points to a dedicated web page where all relevant information is
available.
In synergy with activities developed in the ESA SAVAA project where the transport of the
volcanic plume is characterised using dispersion modeling, the SACS alert service is
primarily designed to support the VAACs in their mandate to gather information on volcanic
clouds and provide advice to airline and air traffic control organisations. SACS also serves
other users that subscribe to the service, in particular local volcano observatories that are
interested to have access to satellite data sets.
The presentation will give a description of the near real time service and the status of the
multi-sensor alert system recently developed for SACS. Alerts are driven by observations
from the SCIAMACHY, OMI, GOME-2, IASI and AIRS instruments. The strength of a
multi-sensor approach that relies on several sun-synchronous satellites flying at different local
times is to minimise the time-lag for event detection and at the same time to enhance the
reliability of the detection. Likewise the simultaneous measurement of SO2 and ash
indicators is used to reinforce the selectivity of the alert system for volcanic emissions. |
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