State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, China.
State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou, 310027, China.
Environ Pollut. 2018 May;236:550-561. doi: 10.1016/j.envpol.2018.01.069.
A winter air pollution episode was observed in Hangzhou, South China, during the Second World Internet Conference, 2015. To study the pollution characteristics and underlying causes, the Weather Research and Forecasting with Chemistry model was used to simulate the spatial and temporal evolution of the pollution episode from December 8 to 19, 2015. In addition to scenario simulations, analysis of the atmospheric trajectory and synoptic weather conditions were also performed. The results demonstrated that control measures implemented during the week preceding the conference reduced the fine particulate matter (PM) pollution level to some extent, with a decline in the total PM concentration in Hangzhou of 15% (7%-25% daily). Pollutant long-range transport, which occurred due to a southward intrusion of strong cold air driven by the Siberia High, led to severe pollution in Hangzhou on December 15, 2015, accounting for 85% of the PM concentration. This study provides new insights into the challenge of winter pollution prevention in Hangzhou. For adequate pollution prevention, more regional collaborations should be fostered when creating policies for northern China.
2015 年，在中国南方城市杭州举办的第二届世界互联网大会期间，出现了一次冬季空气污染事件。为了研究污染特征和根本原因，使用了天气研究和预报化学模型，模拟了 2015 年 12 月 8 日至 19 日期间污染事件的时空演变。除了情景模拟外，还进行了大气轨迹和天气条件的分析。结果表明，会议前一周实施的控制措施在一定程度上降低了细颗粒物（PM）污染水平，杭州市的总 PM 浓度下降了 15%（每日 7%-25%）。由于西伯利亚高压驱动的强冷空气向南入侵，导致污染物长距离传输，2015 年 12 月 15 日杭州出现严重污染，占 PM 浓度的 85%。这项研究为杭州冬季污染防治提供了新的思路。为了充分进行污染防治，在制定中国北方政策时，应加强区域合作。
