论文标题
中国“煤气”过渡期间的天然气短缺导致空气污染的重新分布
Natural gas shortages during the "coal-to-gas" transition in China have caused a large redistribution of air pollution
论文作者
论文摘要
中国的“煤炭到气”战略旨在通过促进中国北部的清洁和低碳燃料来减少煤炭消耗和相关的空气污染。在这里，我们表明，除了气象影响之外，这些措施在2017年冬季在北京和周边地区（“ 2+26”试验城市）的平均颗粒物（PM2.5）浓度平均降低。但是，局部空气质量的改善伴随着中国南部大面积的PM2.5浓度的同时发生约15％。我们发现，由于北部的“煤炭到天然气”过渡，由于排放转移而导致的污染转移是由于南部的天然气短缺引起的。天然气的整体短缺极大地危害了2017年冬季“煤气”战略的空气质量益处，并反映了中国清洁能源过渡中的结构性挑战和潜在威胁。
The Chinese "coal-to-gas" strategy aims at reducing coal consumption and related air pollution by promoting the use of clean and low carbon fuels in northern China. Here we show that on top of meteorological influences, these measures achieved an average decrease of fine particulate matter (PM2.5) concentrations of ~14% during winter 2017 in Beijing and surrounding areas (the "2+26" pilot cities). However, the localized air quality improvement was accompanied by a contemporaneous ~15% upsurge of PM2.5 concentrations over large areas in southern China. We find that the pollution transfer that resulted from a shift in emissions was caused by a natural gas shortage in the south due to the "coal-to-gas" transition in the north. The overall shortage of natural gas greatly jeopardized the air quality benefits of the "coal-to-gas" strategy in winter 2017 and reflects structural challenges and potential threats in China's clean energy transition.
