Is Hangzhou fog or haze this morning?Real -time space quality display: medium mild pollution

35 Zhejiang News Client Editor Liang Liang

Today (September 8), many office workers saw a gray piece outside the window.

According to the forecast of the Zhejiang Meteorological Observatory, the province is cloudy to cloudy today, among which the northern Zhejiang region will be cloudy to overcast at noon. Tomorrow: Cloudy in northern Zhejiang, cloudy to sunny in other areas. Among them, this morning to northern Zhejiang, there was partial fog.

However, the air quality of real time shows that Hangzhou is in mild pollution, and the primary pollutant is PM2.5. Severe urban areas have reached moderate pollution.

Was we see a fog or haze in the morning?

The fog is a visible collection of a large amount of fine water droplets (or ice crystals) suspended in the atmosphere near the ground. Haze is also called haze and haze, and it is a turbid phenomenon formed by a large amount of particulate matter in the air.

The formation of fog requires a certain amount of water vapor and cooling conditions, and the formation of haze requires the dry particles in the air to reach a certain concentration, and the relative humidity cannot be too large.

Generally speaking, fog often appears in the autumn and winter seasons, the lowest temperature in the morning, and the strongest moment of fog.

According to the Meteorological Department, there are many haze composition this morning. "The morning humidity is large, which is a combination of fog and haze. Now the humidity decreases, mainly the ingredient of haze."

Most of the dust in the haze can be inhaled by the human respiratory tract and affects health. Therefore, when the haze weather is encountered, it is better to reduce outdoor exercise as much as possible, which is more conducive to health.

Is the "Autumn Tiger" going back?

Yesterday, Hangzhou's highest temperature rushed to 35.3 ° C all the way, reaching a "high temperature day" achievement. Is this "autumn tiger" going back?

According to the Zhejiang Meteorological Observatory, in general, after entering Bai Lu's solar terms, Zhejiang was hot during the day, and it was slightly cool in the morning and evening. Like the lowest temperature in the province yesterday morning, most areas are between 20-22 ° C. After all, it is already the end of the summer. High pressure is also at the end of the crossbow. The highest temperature in Hangzhou today will drop to 32 ° C, and the lowest temperature in the morning is only 24 ° C.

Hangzhou Malaysia, autumn fire persimmons have been on the market.

Shi Yun, "The autumn wind is 冽 ，, Bai Lu is a frost, but yesterday Bai Lu, why is Hangzhou so hot? Hangzhou Meteorological Observatory stated that this was because after the typhoon "Xuan Lannuo" left, Hangzhou was re -controlled by the subtropical high pressure. Although the current subtropical high pressure is not the same as before, the highest high temperature has passed, but Yu Wei is still there, coupled with the sun and highlights and clear sky, which has led to the rapid rise in temperature during the day.

China Weather Network has counted the high temperature daily during the Bailu period in the past 30 years, and Hangzhou is also famous on the list. Occasionally there will be high -temperature exposed faces during Bailu period. This is because after the beginning of autumn, the south retired subtropical high -pressure often controls Jianghuai, Jiangnan and other places. Although the intensity is weakened, in the area under its control, the weather is clear and the sunshine is strong. Hot weather.

In the history of Hangzhou, high -temperature weather in September is still more common. Hangzhou has appeared in the past 71 years, and the most of them were 1964, reaching 9 days. In September last year, everyone may also have an impression. The maximum temperature of 5 days is above 35 ° C, and the number of high temperature days ranks fifth in history.

However, this year's "Autumn Tiger" will not be as fierce as last year. Yesterday was probably the hottest day in the near future, because the "opponent" of the subtropical high -pressure "opponent" is coming soon. As the high -altitude western wind tank moved east, the subtropical high pressure weakened. Starting from last night, the number of clouds over Hangzhou began to increase, and the heat will gradually decrease. Today, the highest temperature in the urban area is expected to drop to 32 ° C, and it will continue to decrease below 30 ° C after the Mid -Autumn Festival.

After the 12th, Hangzhou may be affected by typhoon activities.

Under the shade of the Taimiao Square, chess everywhere.

Entering Bailu Solar Typhoon is still active

Since this year, the strongest typhoon in the Northwest Pacific, "Xuan Lannuo", has just left. Tropical disturbances on the Northwest Pacific may develop into Typhoon "Plum Blossom" No. 12 this year.

Although it was more than half in the first half of September, the typhoon was still active at this time, not only the number, but also extremely fierce. The Chinese Weather Network invested a typhoon data from 1949 to 2021. It was found that the sum of the strong typhoons and super typhoons that had landed in my country during the period of Bai Lu were the most 24 solar terms in the year, reaching 15. After the Bailu, Lizhou and Daxia, 11 and 10 respectively.

Why is a strong typhoon prone to occur during Bailu? China Weather Network Meteorological Analyst Wang Weiyue introduced that the spring equinox began, the direct sunlight movement moved from the equator to north, heating the northern hemisphere tropical ocean, the heat of the seawater continued to accumulate. Usually from August to September, the sea temperature reached the highest. And energy enhancement. In addition to its own "strong strength", the typhoon at this time is also easy to combine with cold air in the north to create heavy rainfall, which has caused a greater impact.

(According to the Orange City Interactive Client, CM News Client, Zhejiang Meteorological Observatory)

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