BARGAR, John R.1, BONE, Sharon
2, BOYE, Kristin
3, CARDARELLI, Emily
3, JANOT, Noemie
4, NOEL, Vincent
1, WILLIAMS, Kenneth H.
5, FRANCIS, Chris
3 and FENDORF, Scott
1, (1)Stanford Synchrotron Radiation Lightsource, 2575 Sand Hill Rd, Menlo Park, CA 94025, (2)Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, (3)Environmental Earth System Science, Stanford University, EESS--Bld 320, Rm 118, Stanford, CA 94305-2115, (4)LIEC Laboratoire Interdisciplinaire des Environnements Continentaux, Universite ́ de Lorraine, France, 15 avenue du Charmois, Vandœuvre-lés-Nancy, F-54500, France, (5)Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, bargar@slac.stanford.edu