recently, many Beijing people feel, head of blue sky and white clouds, seems to be more up.
in the Micro message, micro-blog, Beijing Tianjin Hebei, Yangtze River Delta, Pearl River Delta region in the blue sky and white clouds, people sometimes Shai Zhaoyang sunset. "Blue sky" much, why?
season, precipitation, atmospheric environmental capacity makes the recent atmospheric pollutants diffusion conditions
experts said, the air quality is influenced by both the emission of meteorological conditions and the sources of pollution, both north and south, summer atmospheric pollutant dispersion conditions are better than in autumn and winter.
National Climate Center climate monitoring room chief expert Zhou Bing introduction, since June, North China the average precipitation is 54.2 mm, than the same period the year is 33%. Since June, Beijing precipitation was 14 days, 1 days more than the same period last year, only in Beijing, but the average rainfall of 113 mm, than the same period last year of nearly 50%, than the same period the year by more than 1 times.
National Climate Center climate and climate change assessment room chief expert Zhu Rong analysis of the atmospheric environmental capacity of Beijing city after that, in June 1st, 22, an average of Beijing city atmospheric environment capacity than in 1981 - 2010 June average 50% higher, compared with the same period in 2013 the average value is 42%. "Since June, the atmospheric environment capacity is higher than the annual average number of days to 12 days, more than the same period last year 5 days, this is people feel 'one reason more blue sky'."
Zhu Rong, the atmospheric environment capacity is located by human activity, atmospheric mixed layer thickness, wind speed and atmospheric mixed layer and precipitation decision, reflect the atmosphere of the pollutant diffusion ability and the rain wash ability.
May 1 - 74 city fine particles of average concentration fell 7.5%
according to the key areas in May the Ministry of environmental protection issued in June 18th and 74 City air quality conditions, with the same period last year compared with last month, 13 city in May the average days in Beijing Tianjin Hebei area ratio has increased, fine particulate matter (PM2.5), inhalable particulate matter (PM10), sulfur dioxide and nitrogen dioxide on both the concentration declined, air quality improvement. The air quality in the Pearl River delta 9 city average days accounted for 96.2%, the main pollutants in addition to carbon monoxide flat, other monthly average concentration decreased, air quality improved.
environmental protection department previously published this year 1 to May monitoring data shows, the first batch of the implementation of cheap NRL Hats the new standard of environmental air quality in the 74 City, fine particles of average concentration drops 7.5% compared to the same period, the average concentration of respirable particulate matter decreased by 6.9%. cheap MLB Fitted Hats
emission cheap new era hats reduction, coupled with the improvement of meteorological conditions, so in many areas since June are frequent "blue sky".
"these monitoring data show that, the Beijing Tianjin Hebei, air quality has improved, this is a welcome change." Director of city development cheap NBA Hats and environmental research cheap NCAA Hats China Academy of Social Sciences Institute of city and Regional Management Office of song >
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