1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin–Madison, Madison, WI 53706.
2. Assistant Researcher, Nelson Institute Center for Climatic Research, Univ. of Wisconsin–Madison, Madison, WI 53706.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin–Madison, Madison, WI 53706; Nelson Institute Center for Climatic Research, Univ. of Wisconsin–Madison, Madison, WI 53706 (corresponding author).