"Flew in April snow " want to come! Garrulous of willow of Beijing ferry look forward to waved 202

Annual " flew in April snow " come! ! !

According to center of city agriculture weather service newest forecast: At present Heibei south already entered flying catkins period, other area will from south wave in succession north fly, heibei is mid area of the ferry that reach Beijing will on April 10 around is entered only then fly period, heibei upper zone will appear at the beginning of May flying catkins, north and south only then fly period differ a month, wave fly period relatively mix all the year round all slanted last year early, for the most part area general in April the middle ten days of a month enters Cheng Fei period.

The main tree that poplar and willow are afforest of town of area of Beijing ferry look forward to is planted, and the flying catkins of willow tree spring also is main establish source sex pollute origin, have bigger effect to health of urban afforest, citizen and fire control safety.

Closely related the weather condition such as the occurrence time of willow flying catkins and temperature, illumination, precipitation, garrulous of willow of on the high side of spring air temperature is formed earlier, warm dry, fine reach the catkin of weather interest Yu Yang with bigger wind-force wave fly. Additional, suffer the effect of air temperature and illumination intensity, willow flying catkins still has the day change law of detail. General in the morning 10 when to afternoon 16 when the tall hair period of time that is flying catkins.

What is actually happening of flying catkins of willow of area of Beijing ferry look forward to reachs forecast

Enter this year spring since air temperature of area of Beijing ferry look forward to relatively all the year round on the high side, the substance that willow cultivates is awaited period relatively shift to an earlier date generally all the year round. Current, the Han Dan of the Campagna austral look forward to, Xing Tai already entered flying catkins period on March 28, shijiazhuang and judge water is entered at the around end March only then fly period. Mix according to temperature of early days bounds accumulate lukewarm computation, be united in wedlock in April integral climate terrain, outside removing Heibei southern part, garrulous of other area willow only then fly period predict to be the first ten days of a month came in April in May the first ten days of a month, from south northerly and ordinal appear, heibei is mid with Beijing ferry area will on April 10 around is entered only then fly period, swallow hill takes north to be entered after May only then fly period, from south differ to north a month, only then fly period hind the Cheng Fei that 5 ～ will enter flying catkins 7 days period, wave fly period antedate to be mixed all the year round last year.

Prospective weather is affected to flying catkins

Forecast according to climate, area of greater part of Beijing ferry look forward to air temperature is overall in April relatively all the year round summary on the high side, will bring about garrulous of partial area willow only then fly period ahead of schedule 2 ～ 3 days; Level sex drops in temperature to be sent more with spit process, will restrain flying catkins period effectively inside wave flying intensity.

Look forward to of ferry of Beijing of prospective a week is major the area will appear drop in temperature and precipitation process, at the appointed time the Yang Xujiang of Heibei south ends basically, heibei is mid after the flying catkins of area of the ferry that reach Beijing will be delayed somewhat, mix abate; Heat of specific area fine and flying catkins of the existence below gentle breeze weather center the likelihood that erupt.

Proposal countermeasure

1, proposal environmental sanitation and park department drench with clear water gush regularly crown of a tree, flying distance of raise of garrulous of block sluggish willow, shorten Yang Fei time, increase the ground to sweep at the same time, aspersion, air adds Shi Pin second, prevent 2 Yang Fei after willow garrulous be born.

2, the citizen goes out do good individual to defend. Allergic constitution, especially asthmatic patient, want to be far from willow garrulous and pollen, decrease as far as possible go out; When going out, adorn the guard such as guaze mask, gauze kerchief, stagger as far as possible the tall hair period of time of willow garrulous.

3, lee is easy cause willow flying catkins to gather, answer to keep clear of in time to produce fire in case.

Origin: City of province of center of climate of city of date of public of Tianjin farming gas, Tianjin, Beijing climate center, Heibei is modern agricultural atmosphere center