关于雾霾天气的英文报告

Introduction

Haze is a combination of fog and haze. Because of the deterioration of air quality, haze weather phenomenon increased, aggravating the damage. In china, many areas the haze weather phenomenon into the mist as early warning and forecasting disastrous weather. Collectively referred to as the "haze weather".

In fact, fog and haze is very different from a certain point of view. For example: the presence of fog haze appeared moist air; air is relatively dry, air relative humidity is below 60%.

The cause of its formation is due to a large number of very small particles of dust, soot, salt and evenly floating in the air, so that the effective horizontal visibility to less than 10KM air mixed erosion phenomenon. Diurnal variation of haze is generally not obvious. When there is no big change, air mass is stable, sustained over a long period of time, sometimes 10 days more sustainable.

Because of the haze, fog, sand dust storm, blowing sand, dust, smoke and other weather phenomena, is floating in the air a lot of very fine particles of dust or smoke particles caused the effective horizontal visibility to less than 10KM.Sometimes the meteorological professionals are difficult to distinguish. Must be combined with the weather background, sky conditions, air humidity, color, odor and satellite monitoring of such factors as the comprehensive analysis and judgment, to draw the right conclusions, but the weather phenomenon of fog and haze are sometimes interchangeable.

Haze harmful to human body after inhalation of the human respiratory tract, long-term inhalation of severe cases can lead to death.

Background

●The haze weather appear in Beijing again

The 28 day, after the National Day holiday in Beijing after the most obvious haze weather, air quality reached again more serious pollution level. Beijing Municipal Environmental Protection Bureau staff said, Beijing have been the first to start heavy air pollution emergency plan blue warning.

In the afternoon on 27th, Beijing see the haze again, Beijing meteorological observatory when release haze yellow warning signal. On 28th, pollution degree gradually increase, air quality and visibility is poor. With the continued calm weather, the pollution degree and the region continued to increase and spread. On the afternoon of the same day, the sky is grey, more air quality reached the serious pollution level. Beijing city environmental protection monitoring center issued a heavy pollution tip says,PM2.5 concentration in each region of Beijing to maintain the severe pollution level, to remind the public to shorten the time to stay outdoors and to avoid going out.

●Definition of haze weather

Fog is fog, haze is haze. Fog appeared often in autumn and winter. When the cold air is not very strong in the fog, fog is neither the cause of the pollution, also is not the