1. School of
Forestry and Environmental
Studies, Yale University, New Haven, Connecticut,
06511, USA
2. Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California,
94720, USA
3. Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA; LA-UR
11-07050
4. Department of
Civil Engineering,
238 Harbert Engineering Center, Auburn University, Auburn, Alabama, 36849, USA