TY - JOUR AU - Xu, Jianzhong AU - Zhang, Qi AU - Shi, Jinsen AU - Ge, Xinlei AU - Xie, Conghui AU - Wang, Junfeng AU - Kang, Shichang AU - Zhang, Ruixiong AU - Wang, Yuhang PY - 2018 DA - 2018// TI - Chemical characteristics of submicron particles at the central Tibetan Plateau: insights from aerosol mass spectrometry JO - Atmospheric Chemistry and Physics VL - 18 IS - 1 CY - State Key Laboratory of Cryospheric Sciences, Northwest Institute ofEco-Environment and Resources, CAS, Lanzhou 730000, China;;Department of Environmental Toxicology, University of California,Davis, CA 95616, USA;;Key Laboratory for Semi-Arid Climate Change of the Ministry ofEducation, College of Atmospheric Sciences, Lanzhou University, Lanzhou730000, China;;Jiangsu Key Laboratory of Atmospheric Environment Monitoring andPollution Control (AEMPC), School of Environmental Science and Engineering,Nanjing University of Information Science & Technology, Nanjing 210044,China;;School of Earth and Atmospheric Sciences, Georgia Institute ofTechnology, Atlanta, GA, USA AB - Recent studies have revealed a significant influx of anthropogenic aerosolfrom South Asia to the Himalayas and Tibetan Plateau (TP) during pre-monsoonperiod. In order to characterize the chemical composition, sources, andtransport processes of aerosol in this area, we carried out a field studyduring June 2015 by deploying a suite of online instruments including anAerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-AMS)and a multi-angle absorption photometer (MAAP) at Nam Co station(90 <sup>∘</sup> 57 <sup>′</sup> E, 30 <sup>∘</sup> 46 <sup>′</sup> N; 4730 m a.s.l.) at thecentral of the TP. The measurements were made at a period when the transitionfrom pre-monsoon to monsoon occurred. The average ambient mass concentrationof submicron particulate matter (PM <sub>1</sub>) over the whole campaign was ∼ 2.0 µ g m <sup>−3</sup> , with organics accounting for 68 %,followed by sulfate (15 %), black carbon (8 %), ammonium (7&t... ID - Xu2018 ER -