On the last working day of 2023, Hangzhou was shrouded in fog, and the morning commute to work was a little "difficult".
Among them, Qiantang District and Yuhang Mountain Area are more serious, and the minimum visibility in some areas is less than 50 meters.
Foggy weather occurred in some areas of northern Zhejiang and central Zhejiang, including Huzhou, Jiaxing, Shaoxing, Hangzhou, and Ningbo, with some dense fog and local strong dense fog.
West Lake this morning, @lxp
Grand Canal Gongchen Bridge Section, @连国庆.
Hangzhou issued a yellow warning signal for heavy fog last night. As of 11:32, the visibility in our city has improved, and the Hangzhou Meteorological Observatory has lifted the yellow warning signal for heavy fog. Due to the increase in air pollutants, there will still be haze after the fog has cleared, and visibility will still be poor in the afternoon and night.
At 9 a.m., the AQI index of some monitoring stations in Hangzhou exceeded 200, reaching the level of severe pollution.
At 10 o'clock, the air quality in Shaoxing, Jinhua and Quzhou was heavily polluted.
This time, the fog and haze weather is regional, not unique to Hangzhou, but widespread occurrence.
This morning, the Meteorological Observatory upgraded the fog warning to the highest level of red. This is also the first time since 2017 that a red warning for fog has been issued.
Meteorological monitoring shows that this morning, light to moderate pollution occurred in central Inner Mongolia, northern Ningxia, Shaanxi, Shanxi, central and southern Hebei, Tianjin, Shandong, Henan, central and southern Jiangsu and Anhui, northern and western Zhejiang, northern Jiangxi, Hubei, Hunan and Sichuan Basin, and severe pollution in some areasVisibility of less than 1 km occurred in some of the above-mentioned areas, including less than 200 m in Hebei, Shandong, Anhui, Jiangsu, Zhejiang and Shanghai.From today to the day of the 30th, it will be the most affected period of this fog and haze weather processIt is expected that there will be light to moderate haze in central and southern North China, central and western Huanghuai, Fenwei Plain, Jianghan, Sichuan Basin and other places, among which, Tianjin, central and southern Hebei, western Shandong, northern Henan and other places will have severe haze.
Hangzhou Meteorological Observatory predicts,There will still be fog in Hangzhou tomorrow morning, and the air quality will not be good tomorrow and the day after tomorrow, because of air pollution, meteorological conditions are relatively poor.
The Zhejiang Provincial Meteorological Observatory predicts that there will still be light haze and local moderate haze in some areas of central and northern Zhejiang tomorrow.
It is expected that from tomorrow night, as the cold air moves southward, the haze will gradually weaken and dissipate.
Smog may lead to an increase in the incidence of respiratory and cardiovascular systems, and the public should take protective measures to minimize outdoor activities.
Why is haze harder to dissipate than fog?
According to Zhu Dingzhen, chief of the public meteorological service of the China Meteorological Administration, fog and haze are actually two weather phenomena, but they have common characteristics, one is the reduced visibility, and the other is that they appear in the background of calm weather, and the air flow is relatively small.
But there is a clear difference between fog and haze. The fog is dominated by water vapor and, of course, dust in it. Fog forms under conditions of sufficient water vapor and a sufficiently low temperature, and once the water vapor is lost or the temperature rises, it disappears.
Haze does not respond significantly to temperature. Sometimes, if a certain place is heavily polluted and fogged, when the sun comes out or the temperature rises, the fog dissipates, and the remaining suspended particulate matter reaches a certain concentration is haze. So, the fog cleared, and the haze rose.
The self-purification ability of the atmosphere is mainly reflected in the breaking of the calm weather, as long asIt's windyWhen the air flows, or the volume of environmental space in the atmosphere expands, the haze will spread and dilute. One more point: YesRainfall。Rainwater absorbs these particles and washes them onto the ground.
New Year's Day holiday weather at a glance
Tomorrow, the New Year's Day holiday (30-January 1) will begin.
Zhejiang Provincial Meteorological Observatory predicts that the New Year's Day holiday in our province will be mainly sunny;Tomorrow, there will be light haze and local moderate haze in the central and northern parts of Zhejiang;From tomorrow night to the day after tomorrow, under the influence of cold air, most of the temperature will be cooled by 4 7, and the temperature will be low on the morning of the 1st. On the 2nd and 5th, it was mainly cloudy in the province.
During the New Year's Day holiday, Hangzhou was mainly cloudy, and from the night of the 30th to the 31st, it was affected by cold air, and the daily average temperature was reduced by 5 7, with the maximum northerly wind in the plain area of 4 6, and the water surface of the mountains and rivers and lakes 6 7On the morning of January 1, the temperature in Hangzhou was low, the lowest temperature in the plains was about 0, and the mountainous areas were -1 -3, and there was freezing.
After the cold air, it will gradually return to calm weather, and the fog and haze will reappear from the 3rd, and the next cold air is expected to be around January 7, when the temperature will drop significantly, and there will be rain before the cold air comes.
Please pay attention to the relevant forecast information, arrange the itinerary reasonably, and have a happy holiday!
Go to post cover photography: Lian Guoqing.