Aging of black carbon particles under polluted urban environments: timescale, hygroscopicity and enhanced absorption and direct radiative forcing

Jianfei Peng1, Min Hu2, Song Guo3, Zhuofei Du4, Jing Zheng5, Dongjie Shang2, Misti Levy Zamora6, Min Shao2, Yusheng Wu5, Jun Zheng7, Yuan Wang8, Limin Zeng9, Don R Collins10, Mario Molina11 and Renyi Zhang12, (1)Texas A&M University College Station, College Station, TX, United States, (2)Peking University, State Key Joint Laboratory or Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Beijing, China, (3)Center for Atmospheric Chemistry and the Environment, Texas A&M University, College Station, TX, United States, (4)Peking, Beijing, China, (5)Peking University, Beijing, China, (6)Texas A&M University, College station, TX, United States, (7)NUIST Nanjing University of Information Science and Technology, School of Environmental Science and Engineering, Nanjing, China, (8)California Institute of Technology, Pasadena, CA, United States, (9)Peking Univeisity, Beijing, China, (10)Texas A & M University, Department of Atmospheric Sciences, College Station, TX, United States, (11)Univ. of California, San Diego, La Jolla, CA, United States, (12)Texas A & M Univ, College Station, TX, United States