California Wildfires Release More Greenhouse Gases Than Thought

It turns out that California wildfires release more greenhouse gases than previously thought, according to new research.

According to the study, from 2001-2010, annual carbon losses from forests and wildlands in California represented as much as five to seven percent of state carbon emissions.

Interestingly, the state's Global Warming Solutions Act, or AB 32, says that by the year 2020 California has to reduce its greenhouse gas emissions to 1990 levels. But these findings, published in the journal Forest Ecology and Management, suggest that goal may be easier said than done.

"Determining the balance between carbon storage and emissions is essential for tracking the role of ecosystems in climate change. Growing vegetation naturally removes carbon from the atmosphere, reducing the magnitude of climate change," lead author Patrick Gonzalez from the National Park Service said in a statement. "Conversely, burned or dead vegetation releases carbon into the atmosphere, exacerbating climate change."

When the bill was passed in 2006, researchers assumed no net emissions for wildland ecosystems by 2020. But that does not seem to be the case. In fact, carbon emissions through landmass conversions and wildfires are expected to increase in intensity in the western United States due to climate change.

What's more, US wildfires spanning across the West, not just in California, are getting bigger and more frequent. Since 1984, wildfires ranging from Nebraska to California have consumed land at a rate of 90,000 acres a year - that's an area the size of Las Vegas.

And most areas that experienced these fiery conditions were severely affected by drought. That's bad news for California, considering that it's in the midst of the worst drought in a millennium. This puts the Golden State at an increased risk for more destructive, carbon-emitting wildfires.

California is home to many forests. Its famous redwood forests near Redwood National Park are its biggest carbon reservoirs, containing the most carbon per hectare of land of any ecosystem in the world (1 hectare= 2.47 acres). In fact, one hectare of redwood forest can store an amount of carbon equivalent to the annual greenhouse gas emissions generated by more than 500 Americans.

The giant sequoia forests of Sequoia and Kings Canyon National parks come in second.