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| Research progress on spatiotemporal distribution of carbonaceous aerosols in China |
| QI Shao-feng1,2, ZHAO Su-ping1,3, YIN Dai-ying4, YU Ye1,3, HE Jian-jun5 |
1. Key Laboratory of Land Surface Processes and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Pingliang Land Surface Process and Disaster Weather Observation and Research Station, Chinese Academy of Sciences, Pingliang 744015, China;
4. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
5. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Aciences, Beijing 100081, China |
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Abstract By sorting out the research results related to carbonaceous aerosols in recent years in China, the spatiotemporal distribution and climate effect of carbonaceous aerosols in China were systematically summarized. Through the collection of existing offline observation data, it is found that the organic carbon (OC) and elemental carbon (EC) in PM2.5 in field observation points were less than 5μg/m3 and 1μg/m3 respectively, and the OC concentration in urban ranges from 3.78 to 30μg/m3 (the average value was 11.98 μg/m3), the mass concentration range of EC was 0.69~10μg/m3 (the average value was 3.93μg/m3),and the high value are mainly distributed in the Hu Huanyong Line (Heihe-Tengchong Line) and the north regions, such as the northeast region, the Fenwei Plain region, the Beijing-Tianjin-Hebei region, Lanzhou Basin and Sichuan Basin. At the same time, OC/EC and SOC/OC in PM2.5 had similar trends with altitude. Carbonaceous aerosols in the different heights within boundary layer had varying effects. Carbonaceous aerosol at upper layer of the boundary layer could inhibit the development of the boundary layer through the radiation effect, while those near the surface can promote the development of the boundary layer.
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Received: 18 April 2023
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