1. Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA.
2. Jackson School of Geosciences, University of Texas–Austin, Austin, TX 78705, USA.
3. Institute for the Environment and Society and Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA.
4. Lamont Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA.
5. Department of Physics, University of Arizona, Tucson, AZ 85719, USA.