New Scientist: Arctic tundra fires may increase significantly as a result of continued global warming, warns a new study examining the relationship between historic changes in climate, vegetation, and wildfires in Alaska. And as about a third of the world’s soil-based carbon is locked in high-latitude tundra and boreal forest ecosystems, the release of carbon dioxide from an increase in burning tundra could also play a significant role in fuelling further warming, the study’s authors …