What is the phenomenon of dark sun in Hefei and what are the reasons?

We will see many natural phenomena in life, and the dark sky is one of them. Rainstorms are common in summer. The sun is very dark in Hefei recently. What's the matter? What is the reason? Next, we will use constellation knowledge to reveal the reasons for this phenomenon!

How about the black sun in Hefei? During the morning rush hour, heavy rain enveloped Hefei, and there was a phenomenon of "darkness". Vehicles driving on city roads have turned on their lights. According to the weather forecast, in the next six hours, the rainfall in some areas of Hefei will reach more than 50 mm, and in some areas it will exceed 100 mm. Please pay attention to strong convective weather such as short-term heavy precipitation, lightning and gusts of 7-8.

Meteorologists explained that the main reason for the dark sun phenomenon is that the cold air thrown by the cold vortex meets the humid southeast airflow in Dalian, forming a strong convective cloud cluster with thick and low clouds, resulting in the dark sun phenomenon. On dark days, convective clouds in the sky develop very vigorously, and the thickness of the clouds once reached 13 km, which was enough to block the sun.

The temperature is too high, resulting in active heating flow. When cold and warm air meet, there will be strong convective weather. In this weather condition, a "low and thick" cloud was born; This kind of cloud is close to the ground, and its unusual thickness blocks the direct light of the sun and even absorbs the scattered light in the sky. When this "heavy" cloud moves over a certain area, it will bring a "dark sky" scene.

Geological disasters should be mainly prevented in Dashu Mountain and Zipeng Mountain in Hefei. In recent days, heavy precipitation has frequently occurred in mountainous areas in southern Anhui and Dabie Mountains, and Anhui Province will enter a period of heavy precipitation concentration in the coming week. Recently, Hefei Natural Resources and Planning Bureau issued geological disaster warning almost every day. According to the latest warning: by 20: 00 on June 14, the meteorological risk of geological disasters such as collapse and landslide will be high in the east and southeast of Feidong County, the east, southeast, northwest and southwest of Chaohu City and the central part of Lujiang County. These areas should be guarded against.

According to the "Geological Disaster Prevention and Control Plan for 2022" recently issued by Hefei Natural Resources and Planning Bureau, it is estimated that the total precipitation in the flood season this year is close to normal or excessive, with uneven distribution of precipitation, regional and periodic droughts and floods, and the overall meteorological conditions are positive years. To the south of Huaihe River, plum blossoms appear in the middle and late June and the middle and late July. Plum blossoms appear later than normal, with more plum rains. August to September is the active period of typhoon.

The key geological disaster prevention period is from May to September, mainly to prevent geological disasters caused by rainfall, typhoons and other factors. According to the geological environment conditions, the development and distribution characteristics of geological disasters and the occurrence and development law of geological disasters in recent years, combined with the forecast of rainfall trend this year, excluding the influencing factors such as earthquakes and extreme weather disasters, it is predicted that the overall trend of geological disasters in 2022 is close to normal, and some areas may be worse than normal. The types of disasters are still sudden geological disasters such as collapse, landslide and debris flow.

These places need to be vigilant: the low hills in the southeast of Chaohu involve Xiage Town, Yinping Town, Sanbing Town, Suwan Town, Huailin Town and Fenghuangshan Street; The towns involved in the hilly areas in the southeast and west of Lujiang County are: Fanshan Town, Longqiao Town, Tangchi Town, Wanshan Town and Baishan Town; The western hilly area of Feixian County involves Zipengshan Management Committee and Mingchuan Township. The west and north of the municipal district, involving high-tech industrial development zone and Luyang District; Scenic spots include Dashu Mountain, Zipeng Mountain, Liu Mingchuan Cemetery and Ye Fu Mountain Forest Park, which are listed as key protected areas. Due to the disorderly accumulation of mining waste residue, there is a problem of debris flow caused by heavy rainfall or continuous rainfall in Baiyun' an Village of Sanbing Town.