China News Service, January 9th Xiao Chan, deputy director of the National Climate Center, introduced on the 9th that it is expected that from the end of early January to the middle of January 2023, the temperature in most parts of my country will rise first and then drop, with obvious fluctuations.
Before the 12th, the temperature in most of the central and eastern regions rose significantly, and the average temperature in some areas was 3~6°C higher than normal in the same period; after that, as the cold air affecting our country strengthened, the average temperature in most of the central and eastern regions will be significantly higher than the previous period It gradually turned significantly lower, and most areas were 1-2°C lower than normal in the same period, of which the eastern part of Northwest China, the northern and eastern parts of Northeast China, the central and northern part of North China, and the western part of Jiangnan were 3-4°C lower.
The China Meteorological Administration held a press conference on the 9th. At the meeting, Xiao Chan released the weather and climate characteristics and later forecasts for December 2022.
National weather and climate characteristics and major climate events in December 2022.
In December 2022, my country's climate is generally cold and dry.
The national average temperature in December was -4.2°C, which was 1.2°C lower than that of the same period in previous years and the lowest in the same period since 2013.
The national average precipitation was 7.5 millimeters, which was 36.9% less than the same period of normal years.
During the month, the daily minimum temperature of 4 national meteorological observation stations across the country broke through or remained the same as the minimum value in December.
The main weather and climate events in my country in December 2022 are as follows:
First, the meteorological drought in Southwest China is showing an overall easing trend.
From early December to December 26, there were severe droughts in southeastern Chongqing, northern and southeastern Guizhou, western Hunan, northern Guangxi, and eastern Yunnan.
From December 27 to 29, 5 to 25 millimeters of precipitation occurred in southwest, central and southern China, and northern southern China, which effectively alleviated the drought.
On December 31, there were still moderate and severe droughts in the central and eastern parts of Southwest China, and the meteorological drought in other areas was basically lifted.
The second is that the four cold air processes have affected our country.
In December, there were 4 cold air processes affecting our country, namely December 11-12, December 17-19, December 22-23, and December 26-27. The number of times was close to the same period of the year (3.9 times).
Among them, the cold air process from the 17th to the 19th was a strong cold air process, causing a large-scale cooling across the country. Among them, most parts of East China experienced a temperature drop of more than 6°C, and the local temperature dropped by more than 8°C.
Third, sand and dust weather affects northern China.
December 11-13, southern Xinjiang Basin, most of Inner Mongolia, western and northern Gansu, northwestern Qinghai, Ningxia, north-central Shaanxi, Shanxi, Hebei, Beijing, Tianjin, Shandong, southwestern Heilongjiang, Jilin, Liaoning and other places Blowing sand or floating dust occurs.
Among them, sandstorms occurred in the central and western parts of Inner Mongolia, and local strong sandstorms occurred.
On December 12, gusts of magnitude 6 and 7 appeared in Beijing, and the local area reached magnitude 8 or above.
The concentration of PM10 in Beijing has risen significantly, and the visibility has decreased. The lowest visibility in most areas is 1-4 kilometers.
Fourth, the number of snowfall days across the country is close to the same period of normal years.
In December, affected by the cold air process, snowfall occurred in some parts of my country.
The number of snowfall days in the central and eastern parts of Inner Mongolia, the northern and eastern parts of Northeast China, and northern Xinjiang is 5 to 10 days, and in some areas it is more than 10 days.
The number of snowfall days in most of Xinjiang, northern and eastern Tibet, northeastern Inner Mongolia, southwestern northwest, central northeast and other places is 2 to 6 days less than the same period of normal years, and local areas are less than 6 days; northern Xinjiang, central Inner Mongolia, northeastern northwest, etc. More than 2 to 4 days in some places, and more than 4 days in some areas.
In December 2022, a total of 18,700 early warning messages were issued across the country, a year-on-year decrease of 4.5%.
Early warning information has played a good role in disaster prevention and mitigation decision-making and grassroots organizations' disaster avoidance.
Regarding the weather forecast for mid-January 2023, Xiao Chan introduced that it is expected that from the end of early to mid-January 2023, the temperature in most parts of my country will rise first and then drop, with obvious fluctuations.
Before the 12th, the temperature in most of the central and eastern regions rose significantly, and the average temperature in some areas was 3-6°C higher than normal in the same period; after that, as the cold air affecting our country strengthened, the average temperature in most of the central and eastern regions will be significantly higher than the previous period It gradually turned significantly lower, and most areas were 1-2°C lower than normal in the same period, of which the eastern part of Northwest China, the northern and eastern parts of Northeast China, the central and northern parts of North China, and the western part of Jiangnan were 3-4°C lower.
It is expected that in mid-January, the precipitation in the central and eastern regions of my country will increase significantly compared with the previous period. The cumulative precipitation in Jianghuai, Jianghan, most of Jiangnan, central and eastern South China, and eastern Sichuan Basin will be 20-40 mm. Central and southern Jiangnan, western South China and Some areas in the north and other places have 50-70 mm, and the local area in the northern part of South China exceeds 100 mm; the precipitation in most of the above-mentioned areas is 3-70% higher than that of the same period in previous years, and the local area is 1-2 times higher; in addition, northern Xinjiang and northwest The rainfall in the eastern part of the region, North China, Northeast China, Huanghuai and other places will be 30% to 50% more than the same period of normal years.
Cumulative precipitation will generally be 3 to 8 millimeters, and 10 to 25 millimeters in some areas.
From the 11th to the 12th, strong cold air began to affect Xinjiang. Most of northern Xinjiang will experience moderate to heavy snowfall, local blizzards, and a drop in temperature of 6-12°C, and a local drop of more than 14°C.
There will also be northerly winds of magnitude 4-6 and gusts of magnitude 7-8 in the above-mentioned areas.
From the 12th to the 15th, the strong cold air continued to move eastward and affect the central and eastern parts of my country.
The eastern part of Northwest China, North China, most of Northeast China, Huanghuai, northern Jianghuai, northern Jianghan and other places will have light to moderate snow (rain) or sleet, and local heavy snowfall; eastern Sichuan Basin, Jiangnan, South China and other places There will be light to moderate rains, and local heavy to heavy rains; in addition, most of the central and eastern regions will experience a 6-10°C drop in temperature, and local temperatures in Inner Mongolia, Northeast China, Jianghan, and Jiangnan will exceed 14°C.
From north to south, there will be northerly winds of magnitude 4 to 6 in most of the north and Jiangnan and other places on the 13-15.
On the 13th and 16th, northerly winds of magnitude 6 to 8 will appear in the eastern sea area of my country from north to south.
When Xiao Chan introduced the climate trend forecast and meteorological service reminder in late January 2023, he pointed out that in terms of precipitation, it is expected that in late January, Shanghai, most of Jiangsu, northern Zhejiang, northern Anhui, southern Shandong, eastern Henan, central and eastern Tibet, and southwest Qinghai Precipitation is slightly higher than normal in the same period in the same period in the same period of normal years; the precipitation in most of the rest of the country is close to the same period of normal years to less, among which, most of Hunan, northern Guangdong, northern Guangxi, eastern Guizhou and other places are 20% to 50% less .
In terms of temperature, it is expected that in late January, the temperature in western Sichuan, most of Yunnan, most of Tibet, and most of Qinghai will be higher than normal in the same period. Among them, the temperature in western Sichuan, western Yunnan, eastern Tibet, and southeastern Qinghai will be higher by 1 ~2°C; the temperature in most other parts of the country is close to the same period of the year to low, of which, western Hebei, most of Shanxi, most of Inner Mongolia, southwestern Liaoning, most of Heilongjiang, western Henan, western Hubei, most of Chongqing, and eastern Sichuan Temperatures in some areas, southern Shaanxi, most of Xinjiang and other places were 1-2°C lower.
In terms of cold air, it is expected that in late January, there will be one major cold air process affecting our country, and the time and intensity of appearance will be: late late January (moderate).
According to the weather and climate trend forecast in January, there are four suggestions for meteorological service:
The first is to prevent the adverse impact of periodic low temperature weather on energy supply.
There is an obvious cold air process in mid-January, and the temperature in most parts of the central and eastern regions will turn low.
Western North China, most of Inner Mongolia, Northeast China, Xinjiang and other places need to pay attention to the possible adverse effects of periodic low temperature weather on energy supply and other aspects. It is recommended to make defense arrangements in advance and formulate emergency support plans.
The second is to prevent the adverse effects of low temperature, rain and snow on agriculture and transportation.
From the 11th to the 15th, there will be large-scale rain and snow in most parts of my country. Among them, most parts of the north will have light to moderate snow (rain) or sleet, and local heavy snow.
The adverse effects of low temperature, rain and snow weather on facility agriculture, animal husbandry and transportation should be strengthened.
The third is to prevent the adverse effects of weather drought.
It is expected that in late January, there will be less precipitation in the southwest of Southwest China and the west of Jiangnan, and the temperature will be close to the same period of the year to be on the high side. It is necessary to pay attention to the continuation or development of meteorological drought, strengthen field management of winter wheat, rapeseed and other crops, and do a good job in forest fire prevention; At the same time, pay attention to the adverse impact of weather drought on energy supply and power transmission.
The fourth is to prevent the adverse effects of cold weather on public health and travel.
The Spring Festival holiday is superimposed in late January, and public travel activities increase. Therefore, all localities need to pay attention to the impact of low temperature weather on human health and road traffic. The public needs to add clothes to keep warm according to weather changes, prevent colds, cardiovascular and cerebrovascular diseases, and pay attention to travel safety. .