1. State Key Lab. of Atmospheric Boundary Layer Physics and Atmospheric Chemistry; Institute of Atmospheric Physics Chinese Academy of Sciences; Beijing China
2. Jiangsu Key Lab. of Agric. Meteorology; School of Applied Meteorology Nanjing Univ. of Information Sciend and Technology; Nanjing China
3. Dep. of Agronomy; Iowa State Univ.; Ames IA 50011
4. National Center for Atmospheric Research; Boulder CO 80307-3000
5. Hebei Provincial Meteorological Observatory; Hebei China
6. USDA-ARS; National Lab. of Agriculture and Environment; Ames IA 50011-3120