Department of Geography and Berkeley Atmospheric Sciences Center, University of California, Berkeley 507 McCone Hall #4740, Berkeley, CA 94720-4740 United States
Department of Biology, Colorado State University Natural Resource Ecology Lab, Fort Collins, CO 80523 United States
Department of Geography and Berkeley Atmospheric Sciences Center, University of California, Berkeley 507 McCone Hall #4740, Berkeley, CA 94720-4740 United States ; Lawrence Berkeley National Laboratory, Center for Isotope Geochemistry, MS 70A-4418, Berkeley, CA 94720 United States
Department of Geography and Berkeley Atmospheric Sciences Center, University of California, Berkeley 507 McCone Hall #4740, Berkeley, CA 94720-4740 United States
Department of Geography and Berkeley Atmospheric Sciences Center, University of California, Berkeley 507 McCone Hall #4740, Berkeley, CA 94720-4740 United States