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(added on 2016/12/23)

Smog the silent killer 「霾」 葬健康

%copy; 2016 SpatioEpi.com
Data source: CMA, NBS, PRC government
Map created by CUHK SpatioEpi Group

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Every year when winter comes, cities in northern China often have to face serious smog weather. In 2016, the adverse weather began from Chengdu in late November, followed by worsened situations in December in the capital city Beijing and nearby provinces. Up to 17th December, a total of 23 cities had issued the "red alert", the highest level of the four-tier smog warning system. Bad weather led to school suspension and air traffic cancellation. Apart from impacting daily life, citizens' health was also seriously threatened. In Beijing, there were reports of children admitted to hospital due to respiratory diseases.

The map shows the 23 cities that had issued red smog alert, their respective population size and the atmospheric concentration of PM2.5 reported by China Meteorological Administration on 16th December. The accumulation of environmental pollutants was particularly serious around the capital. This is the combined effect of (1) intensive pollutant emission from the industrialized and developed North China plain and (2) failure of air pollutants to disperse in the mountainous region in the west.

This map was created with data collected from China Meteorological Administration and National Bureau of Statistics of the People’s Republic of China.

每年冬天到來,中國位於北方的城市便會迎來霧霾(又稱『霾』)。二零一六年十一月尾,霧霾天氣於成都開始形成,而首都北京及附近省份情況亦於十二月逐漸顯得嚴重。截至十二月十七日,中國共有23個城市發出最高第四級別的霾紅色預警。惡劣天氣導致學校停課及航空交通中斷。除了影響日常生活,市民的健康亦大受威脅,北京已有不少兒童因呼吸道疾病而需要在醫院接受治療。

地圖顯示23個發出霾紅色預警的城市、各市人口總數、及中國氣象局於十二月十六日報告大氣中PM2.5的濃度。首都附近累積污染物有兩大原因:(一)華北平原工業化及發展地區排放大量廢氣;(二)西部山脊地帶不利污染物在空氣擴散稀釋。

資料源自中華人民共和國國家統計局及中國氣象局。