China Meteorological Bureau: It is estimated that there will be three cold air processes affecting China in April.

  CCTV News:According to China Meteorological Bureau WeChat WeChat official account news, on April 4, China Meteorological Bureau held a regular press conference in April to review the national weather and climate characteristics in March; Release the climate trend forecast and meteorological service tips in April 2023; Announce the arrangement of meteorological service guarantee in flood season, the top ten scientific events of climate change in 2022, and the Annual Bulletin of Wind Energy and Solar Energy Resources in China in 2022. Zang Haijia, Deputy Director of Science and Technology and Climate Change Department of China Meteorological Bureau, Fang Xiang, Deputy Director of National Meteorological Center, Yuan Jiashuang, Deputy Director of National Climate Center, and Zheng Jiangping, Deputy Director of Public Meteorological Service Center of China Meteorological Administration answered questions from reporters.

  National Weather and Climate Characteristics and Major Climate Events in March

  In March, China’s climate was generally warm and dry. In March, the national average temperature was 6.7℃, 1.9℃ higher than normal, and the third highest in the same period since 1961. The national average precipitation is 26.4 mm, 10.3% less than normal. The main weather and climate events are as follows:

  First, meteorological drought has emerged and developed in some parts of the south.In the first half of March, the temperature in East China, South China and South China rose rapidly, and the precipitation was less than 80% compared with the normal period. The meteorological drought emerged and developed rapidly. The precipitation since March 16 eased the drought in the above areas. However, meteorological drought in Yunnan, Shandong and other places continued. As of March 31, there were moderate to severe meteorological droughts in Shandong, central and western Anhui, parts of southern Sichuan and most of Yunnan, and some were particularly dry.

  Second, there are many cold air processes.Since March, there have been four cold air processes in China, 0.4 times more than normal. From March 11th to 14th, the national cold wave process dropped significantly, and the temperature dropped by more than 14℃ in the southeastern part of China, the central and eastern Inner Mongolia, and the northwestern Shaanxi. The windy and cool weather had a certain impact on facility agriculture and animal husbandry in some areas.

  Third, the dust process is strong.Since March, there have been four sandstorm weather processes affecting China, among which the sandstorm process from March 19 to 24 was the strongest and most extensive this year, reaching the level of strong sandstorm. The windy and dusty weather has caused the air quality in more than 60 cities to reach the level of severe and above pollution, but the intensity is weak compared with the strongest dusty weather process in China in the past 12 years from March 13 to 18, 2021.

  Fourth, the first large-scale strong convective weather process occurred in Jiangnan and South China this year.From March 22 to 24, a large-scale strong convective weather process occurred in Jiangnan and South China. Thunderstorms of magnitude 8 to 12 occurred in southern Jiangnan and northern South China, and hail occurred in Jiangxi, Zhejiang, Fujian, Guangxi and Guangdong. The largest hail diameter in Ganzhou, Jiangxi and Nanping, Fujian reached more than 50 mm.

  April Climate Trend Forecast and Meteorological Service Tips

  Temperature: the temperature in the western region is low, and the temperature in the central and eastern regions is high. There are mainly three cold air processes affecting China in April, and the time and intensity are: early (strong), late (weak) and early (weak).

  Precipitation: North China, Northeast China, Huanghuai, Jiangnan, Tibet, Northwest China and other places have more precipitation. It is estimated that in April, the precipitation in North China, the eastern and southern parts of Northeast China, Huanghuai, Jiangnan, Tibet, and the northeastern part of Northwest China will be more than normal, including Beijing, Tianjin, most of Hebei, Shanxi, central Inner Mongolia, most of Jiangxi, Shandong, northern Henan, most of Hunan, central and western Tibet, and northwestern Shaanxi. Yunnan and southern Xinjiang are 20% to 50% less.

  According to the climate trend forecast in April, there are three aspects of meteorological service tips and suggestions:

  The first is to prevent the adverse effects of dust, fog and haze on public health.During the active period of cold air, there is a great risk of sandstorm weather in northern China, which affects the atmospheric environment, outdoor construction, human health and travel safety. It is suggested to take timely countermeasures. During the cold air intermission, the elderly, children and the infirm are prone to respiratory diseases and need to be protected.

  The second is to prevent the risk of rain and waterlogging.The precipitation in Hunan and Jiangxi has a moderate risk of waterlogging, so it is necessary to pay attention to prevent secondary disasters such as flash floods, landslides and mudslides that may be caused by heavy precipitation, as well as urban and rural waterlogging.

  The third is to prevent the influence of late spring cold, late frost, snowstorm and drought on agriculture.There is a risk of late spring cold and late frost in winter wheat areas in early days. It is suggested that measures should be taken to improve the adaptability of wheat seedlings to freezing injury and to prepare and strengthen agricultural heat preservation facilities. Southern Tibet needs to pay attention to the impact of snow disaster, so it is suggested to reserve grain and grass in advance, take measures such as wind prevention, reinforcement, cold protection and warmth preservation for facility agriculture, and do a good job in transportation, electricity and communication to deal with the freezing rain and snow. The drought in southern Sichuan and Yunnan will continue or develop, so it is suggested to seize the favorable weather to carry out artificial precipitation enhancement, strengthen water storage and conservation, and do a good job in fire prevention.

  Next ten days(April 5-April 14)Weather trend forecast

  Precipitation: In the next 10 days, the accumulated precipitation in most parts of southern China, the eastern part of Northeast China and eastern Tibet will be 10 to 40 mm, including 50 to 70 mm in parts of southern China and northern South China. The precipitation in these areas is close to normal or 30 to 60% higher.

  Temperature: In the next 10 days, the average temperature in northern Xinjiang, Inner Mongolia, northwestern Shanxi and northern Hebei will be 1-3℃ lower than normal, while the average temperature in Jianghuai and Jiangnan will be 1-2℃ higher than normal, and the average temperature in most other parts of the country will be close to normal.

  Main weather processes:

  On the 5th, there was moderate to heavy rain in central Jiangxi, southern Zhejiang, Fujian and northern Guangdong.

  From September 9 to 11, there was a moderate to heavy rain in Jiangnan, northwestern South China and Guizhou. Affected by cold air, the temperature in most parts of eastern and northern Inner Mongolia dropped by 4-8℃, and there was light rain and snow in the northeast.

  From 13th to 14th, there will be a large-scale precipitation process in the central and eastern regions.

  National emergency in MarchEarly warning information release

  In March, a total of 24,700 pieces of early warning information were issued nationwide, including 24,200 pieces of meteorological disaster early warning information. The number of early warning information released nationwide increased by 38.0% compared with February, among which the early warning information of hail and sandstorm increased significantly compared with March last year.