Journal Highlights

Contribution of natural geologic seepage to methane emissions

Editor’s Highlight—


The process of natural geologic seepage has received little attention from the atmospheric science community despite its potential contribution to climate change. This paper considers one particular methane seep, the La Brea tar pits, located within a city park in Los Angeles. The authors found that the emissions of methane from this area were the largest yet measured from a naturally occurring geologic seep in the United States. They data reveal large methane and alkane seepage into the atmosphere, with gases escaping from the asphalt, soil and lakes in the park.