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Satellites are tracing Europe's forest fire scars 
Burning with a core heat approaching 800°C and spreading at up to 100 metres per minute, woodland blazes bring swift, destructive change to landscapes: the resulting devastation can be seen from space. An ESA-backed service to monitor European forest fire damage will help highlight areas most at risk of future outbreaks. Last year's long hot summer was a bumper year for forest fires, with more than half a million hectares of woodland destroyed across Mediterranean Europe. So far this year fresh fires have occurred across Portugal, Spain and southern France, with 2500 people evacuated from blazes in foothills north of Marseille. According to the European Commission, each hectare of forest lost to fire costs Europe's economy between a thousand and 5000 Euros.
The distinctive 'burn scars' left across the land by forest fires can be identified from space as a specific reddish-brown spectral signature from a false-colour composite of spectral bands from optical sensors in the short wavelength infrared, near infrared and visible channels.
Burn scar detection is planned to take place on a seasonal basis, identifying fires covering at least one hectare to a standard resolution of 30 metres, with detailed damage assessment available to a maximum resolution of 2.5 metres using the SPOT 5 satellite.
"To cope with fire disasters, the most affected Departments in the south of France have decided to join forces to ensure effective forest fire protection," explained Nicolas Raffalli of CEREN. "Within the Entente region we have an existing fire database called PROMETHEE, which is filled out either by firemen, forestry workers or policemen across the 13 Departments making up the region."
"We want to link up PROMETHEE with this burn scar mapping product from Risk-EOS to have a good historical basis of information," Raffalli added. "The benefit is that it makes possible a much more effective protection of the forest."
Having been validated and geo-referenced, burn scar maps can then be easily merged with other relevant geographical detail. The vast majority of fires are started by the actions of human beings, from discarding cigarette butts up to deliberate arson. Checking burn scar occurrences against roads, settlements and off-road tracks is likely to throw up correlations.
Another planned service will identify 'hot spots' during fires, and map fire events twice a day, permitting an overall assessment of its development and the damage being done. A 'fires memory atlas' set up at national or regional level will allow the routine sharing of all information related to forest fire events and fire risk.
"For the future I think near-real time fire and hot spot mapping would obviously be extremely useful," Raffalli concluded. "With these products those managing the situation could see where the fire is, as well as the hot spots inside it. They can then deploy ground and aerial resources with maximum efficiency."
Italy's National Civil Protection Department is providing advice on the implementation of the Risk-EOS service, based on previous experience with an ESA Data User Programme (DUP) project called ITALSCAR.
Run for ESA by the Italian firms Telespazio una Societá Finmeccanica and Vitrociset, ITALSCAR charted burn scars across the whole of Italian territory occurring between June and September during the years 1997, 1998, 1999 and 2000.
However the mapping of burn scars is the responsibility of local administration and their methodologies and overall effectiveness are highly variable. No central cartographic archive of burn scar perimeters exists: the closest equivalent is a cardset index (Anti Incendio Boschivi or AIB) recording fire-fighting interventions by the Italian Forest Guards.
The Risk-EOS burn scar mapping service is based around this same methodology.
Managed by Astrium, Risk-EOS also incorporates services for flood as well as fire risk management. It forms part of the Services Element of Global Monitoring for Environment and Security (GMES), an initiative supported jointly by ESA and the European Commission and intended to establish an independent European capability for worldwide environmental monitoring on an operational basis.
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