A few highlights from today's Yale Forum Webcast featuring Ralph Keeling of the Scripps Institute of Oceanography and Britton Stephens of NCAR, paraphrasing:
Keeling: 400 ppm is an opportunity to pause and think about where we're going
Stephens: During winter time temperature inversions, Salt Lake City can record CO2 levels of up to 600 ppm.
Keeling: "We're not in a position to reverse the [CO2] trend anytime soon."
Stephens: It's important to keep multiple CO2 monitoring stations going because (1) science relies on replication, and (2) it has often been the data-takers who, puzzling over unexpected readings, have pointed the way to new insights and findings in the Earth's carbon cycle.