All Climate Events

Wednesday, March 14, 2018. 12:00 PM. Atmospheric methane: where did you come from, where did you go? Alex Turner, University of California, Berkeley. Sponsored by NOAA GFDL. More information here. 

Methane is the second strongest anthropogenic greenhouse gas and its atmospheric burden has more than doubled since 1850. Methane concentrations stabilized in the early 2000s and began increasing again in 2007. Neither the stabilization nor the recent growth are well understood, as evidenced by multiple competing hypotheses in the literature over the past 12 months. Hypotheses in the literature include: Asian livestock, tropical wetlands, US oil and gas. This talk will address three main questions: 1) What are the drivers of the decadal trends in atmospheric methane?, 2) Why do so many, apparently, plausible explanations disagree with each other?, and 3) What is the role of ENSO in modulating the methane sink (OH)?