@Article{Xu2018, author="Xu, Jianzhong and Zhang, Qi and Shi, Jinsen and Ge, Xinlei and Xie, Conghui and Wang, Junfeng and Kang, Shichang and Zhang, Ruixiong and Wang, Yuhang", title="Chemical characteristics of submicron particles at the central Tibetan Plateau: insights from aerosol mass spectrometry", journal="Atmospheric Chemistry and Physics", year="2018", address="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 {\&}amp; Technology, Nanjing 210044,China;;School of Earth and Atmospheric Sciences, Georgia Institute ofTechnology, Atlanta, GA, USA", volume="18", number="1", abstract="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 57 {\textasciiacutex} {\thinspace}E, 30 46 {\textasciiacutex} {\thinspace}N; 4730{\thinspace}m{\thinspace}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 1) over the whole campaign was ∼ {\thinspace}2.0{\thinspace} {\textmu} g{\thinspace}m −3 , with organics accounting for 68{\thinspace}{\%},followed by sulfate (15{\thinspace}{\%}), black carbon (8{\thinspace}{\%}), ammonium (7{\&}amp;t..." }