Guido van der Werf researches how the global carbon cycle and the climate influence each other.
Burning questions about deforestation
Our climate is warming due to the increased amount of greenhouse gases in the atmosphere: we now emit more carbon dioxide, for example, than is absorbed from the air by plants.
The biggest culprit is the burning of fossil fuels such as coal, oil and gas, but also the burning of forests and grassland produces greenhouse gases. Once burned, forests give way to lighter vegetation and the amount of carbon dioxide in the atmosphere is further increased.
Forest and grassland fires are currently releasing about the same amount of carbon dioxide and methane into the atmosphere as the whole of Europe. And there are other serious consequences, such as entire countries which occasionally disappear for months at a time in clouds of particulate matter.
Van der Werf is a global authority when it comes to charting fires and their consequences. Together with American colleagues he built the ‘Global Fire Emissions Database’, a global database of satellite photos and other measurement data received from the US space agency, NASA. Thanks to this database any researcher in the world can follow year on year where on the planet tracts of forest or grassland went up in smoke and the quantity of greenhouse gases thereby emitted.
Partly thanks to this rich, freely accessible collection of data there is increasingly more clarity on the crucial interactions between the global carbon cycle and our climate, and on how changes in land use negatively or positively contribute to global warming.