 In our Explore series, NKAR oceanographer Matt Long discusses planetary metabolism in a changing climate. I'm going to discuss some work we've been doing to understand the global carbon cycle. So we've been using the Gulfstream V aircraft to collect samples of oxygen and CO2 and we're using the distribution of those gases to make inferences about air-sea fluxes of primarily carbon and to understand the role of the ocean in absorbing carbon dioxide. The thing I'm probably most excited about sharing is a sense of appreciation for the intricacies of the Earth's system and in particular the role that the biosphere is currently playing in tempering the rate of climate change.