Since spring, sand and dust have been rising. On 27 may, during the regular press conference of the ministry of ecology, the press spokesman for the ministry of ecology, bae xiaofei, responded to the questions related to sand and dust weather, noting that this year's high incidence of sand and dust weather was mainly affected by weather conditions in three areas: low precipitation, high soil temperatures and wind weather, while emphasizing that pollution control measures would be implemented on an ongoing basis。
According to bae xiaofie, the sandy sandy weather in our country is mainly concentrated in the south of mongolia and in the western part of mongolia's autonomous region. In the spring of this year, the precipitation of these sand-sourced areas and the regions through which they pass is significantly lower than the annual average and in april alone it was 43. 5 per cent lower than it was in the same period last year, which is one of the important incentives for the high incidence of sand and dust. At the same time, soil temperatures in sand source areas and through regions were 4. 2 degrees celsius higher than last year. In the absence of a full recovery of vegetation in the spring, the scarcity of precipitation further reduces the sand-fixing capacity of the soil. In addition, the wind factor cannot be ignored. This spring, my country experienced a wide range of wind conditions, in particular a strong national wind from 7 to 13 april, which directly led to the formation of a strong sand and dust cloud from 10 to 14 april. From the source of the sand, the air mass travelled southwards, affecting an area of more than 5. 6 million square kilometres, both in terms of impact and transport distance, exceeding the observation record for nearly 10 years。
Bae xiaofie mentioned that sand and dust weather had a serious impact on air quality. Data show that between january and april of this year, the percentage of good days in the country was 84. 3 per cent, the proportion of heavy and above pollution days was 1. 9 per cent, and the situation with regard to combating atmospheric pollution was critical。
According to bae xiaofie, with the onset of the summer monsoon in june, weather conditions dominated by warm and wet currents are expected to reduce the long-range transport conditions of sand and dust, together with increased rainfall, vegetation growth and improved soil sand stabilization capacity, and a gradual reduction in the risk of sand and dust weather in the future。
“the main reason for winning the blue sky is to rely on `human effort and help', and people have to work harder if they don't. Next, we will implement pollution prevention and control measures in the spirit of "cruising nails" to continuously improve air quality and sustain the people's sense of blue sky happiness."。
Journalist zheng xinxian
