Kong Xiang-Chen, Wang Hong-Lei, Zhang Lian-Xia, Hu Qun, Li Rui-Feng, Xu Cai-Qin
Ordos Meteorological Bureau of Inner Mongolia, Ordos 017000, China.
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science&Technology, Nanjing 210044, China.
Huan Jing Ke Xue. 2020 Dec 8;41(12):5295-5305. doi: 10.13227/j.hjkx.202004212.
In this study, the aerosol number size distribution in the range of 10 nm-10 μm was collected from August 16 to October 04, 2019 at Ordos using a wide-range particle spectrometer (WPS). Combined with PM (PM and PM), pollution gases, meteorological data, and the HYSPLIT model, the characteristics and impact factors of new particle formation (NPF) were discussed. The results indicated that there were 19 NPF events during the observation period, which have different effects on diurnal variation in aerosol number concentration in different modes. The NPF events caused a sharp increase in the number concentration of nucleation and Aitken mode aerosols, but had little effect on the number concentration of accumulation and coarse mode aerosols. The temperature, wind speed, and total solar radiation during NPF days were usually higher than those in non-NPF days, and the RH during NPF days was lower. On NPF days, the mass concentrations of PM, PM, CO, and NO were lower than those on non-NPF days, while the mass concentrations of O and SO were higher. NPF events were observed in 40.0% of northern air masses and 29.6% of southern air masses. There were significant differences in meteorological elements in different NPF event air mass types. The southern NPF event air mass type had the lowest wind speed and the highest RH, with averages of (2.4±1.5) m·s and (48.8±10.8)%, respectively. The northern NPF event air mass type had the highest wind speed and total solar radiation, with averages of (4.2±1.9) m·s and (664.5±255.6) W·m, respectively. The western air mass type of NPF event had the lowest RH, with an average of (29.8±12.7)%. The formation rates of new particles in the different air mass types of NPF events were similar, ranging from 1.5 to 1.8 cm·s. The largest growth rate was (12.7±13.6) nm·h in the southern NPF event air mass type, which was 1.2 times and 1.4 times higher than the NPF events of northern air masses and western air masses.
在本研究中，于2019年8月16日至10月4日期间，在鄂尔多斯使用宽范围粒子光谱仪（WPS）收集了10纳米至10微米范围内的气溶胶数粒径分布。结合PM（PM 和 PM）、污染气体、气象数据以及HYSPLIT模型，探讨了新粒子形成（NPF）的特征及影响因素。结果表明，观测期间共有19次NPF事件，这些事件对不同模式下气溶胶数浓度的日变化有不同影响。NPF事件导致成核模态和艾肯模态气溶胶的数浓度急剧增加，但对积聚模态和粗模态气溶胶的数浓度影响较小。NPF发生日的温度、风速和总太阳辐射通常高于非NPF发生日，而NPF发生日的相对湿度较低。在NPF发生日，PM、PM、CO和NO的质量浓度低于非NPF发生日，而O和SO的质量浓度较高。在40.0%的北方气团和29.6%的南方气团中观测到了NPF事件。不同NPF事件气团类型的气象要素存在显著差异。南方NPF事件气团类型的风速最低，相对湿度最高，平均值分别为(2.4±1.5)米·秒和(48.8±10.8)%。北方NPF事件气团类型的风速和总太阳辐射最高，平均值分别为(4.2±1.9)米·秒和(664.5±25
