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This winter will be colder, sand, dust may cause more pollution in coming months
Published on: 2021-11-04
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China has experienced continuous improvement in its air quality this year but may suffer more floating sand and dust in the coming winter and spring, officials said.
 

So far this year, the average concentration across the country of PM2.5-particulate matter smaller than 2.5 microns that is harmful to health-stood at 28 micrograms per cubic meter, down 6.7 percent year-on-year, Liu Shusheng, a senior official with the environmental monitoring department at the Ministry of Ecology and Environment, said at a news conference on Friday.
 

Following a year-on-year decrease of 8.3 percent, the country saw the average concentration drop to 33 mcg per cubic meter in 2020, according to the ministry.
 

Liu, however, warned of a "still grim" situation in the coming winter because of unfavorable meteorological conditions, during which the country usually suffers the worst air quality because of the consumption of coal for heating.
 

Precipitation in northern Asia in the winter and spring is expected to be less than in normal years, potentially causing above average frequency of floating sand and dust, he said.
 

But he ruled out the high possibility of heavy sandstorms in the country.
 

He said more frequent and stronger cold air is forecast to strike the country in a relatively cold winter, resulting in favorable meteorological conditions for the dispersal of air pollutants.
 

预计今冬气候偏冷,今冬明春沙尘天气出现频次多

10月29日,在生态环境部10月例行新闻发布会上,生态环境监测司一级巡视员刘舒生介绍,与往年相比,今冬明春的大气扩散条件基本接近或略微偏差,大概率仍有沙尘天气出现,发生频次可能多于历史平均水平,大气污染防控形势仍然较为严峻。
 

刘舒生指出,生态环境部组织有关科研机构,逐月对秋冬季空气质量形势进行会商后,形成以下三个基本判断:
 

第一,在沙尘天气方面,亚洲北部沙源地区域今冬明春降水可能呈现偏少趋势,其生态状况整体偏差,预计今冬明春大概率仍有沙尘天气出现,发生频次可能多于历史平均水平,但出现强沙尘暴天气的可能性相对较低。
 

第二,预计在冬季形成一次弱到中等强度的拉尼娜事件。根据气象部门预测,今年冬季气候可能相对偏冷,我国部分地区可能会受到更强或频繁的冷空气过程影响,相对有利于污染物的扩散。
 

第三,华北地区大气扩散条件总体偏差。目前国际各主流气候预报机构的预测结果仍在不断调整,对于华北地区2022年2—3月大气扩散条件的整体判断是:气温接近常年平均水平或略偏高,降水接近常年平均水平或略偏多,近地面相对湿度偏大,近地面风场较常年出现偏南风几率较高,不利于污染物扩散。

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