1. Emmett Interdisciplinary Program in Environment and Resources, Stanford University, Stanford, CA 94305, USA.
2. Graduate School of Business, Stanford University, Stanford, CA 94305, USA.
3. Stanford Woods Institute for the Environment, Stanford, CA 94305, USA.
4. Oceanography Department, United States Naval Academy, Annapolis, MD 21402, USA.
5. Department of Earth System Science, Stanford University, Stanford, CA 94305, USA.