Preamble:
In recent years, with the frequent occurrence of global climate anomalies, the frequency and rainfall intensity of continental typhoons have also shown certain changes. This year, although Typhoon Fengshen has not yet arrived, a typhoon embryo has been generated in the northwest Pacific region, coded 92W, which seems to be "warming up" for this year's typhoon season. At the same time, under the control of the strong tropical high, the northern region has been suffering from long-term water shortages, triggering a continuous dry climate phenomenon. Recently, although there has been a wave of rainfall in Northeast China, the scope is relatively scattered, and the effect on alleviating drought is limited. What are the characteristics of the impact of typhoons and rainfall on the continent in this special climatic context?
1. The first typhoon embryo was born this year
With the gradual rise in temperature, this year's typhoon season seems to be "reporting early". Recently, a typhoon embryo was generated in the Northwest Pacific region, coded 92W, which is currently weaker in intensity, but it is generated closer to the equatorial region and has some development potential. According to the forecast of the meteorological department, the path of this typhoon embryo may continue northward off the coast of the Philippines, but its intensity may weaken due to the influence of the Philippine topography.
Judging from the current track prediction, this typhoon embryo may continue to move northward near the Philippines, and the overall trend of the track is dominated by westward and northwestward movements, which also means that the eastern and eastern coastal areas of South China and East China of the mainland may be affected to a certain extent in the coming period. However, due to the low water temperature in the sea area along the typhoon's path and the influence of the subtropical high, the possibility of this typhoon embryo making landfall is not very high, and even if there is a certain impact, the rainfall brought by it is relatively small, and the effect on local rainfall and water replenishment is limited.
2. Continued drought in the northern region
Unlike the typhoon season in the south, which is relatively busy, the north has been in a rainy "rain season", especially in the spring, when the rainy time for sowing and growing has not yet arrived. Recently, under the long-term control of the strong tropical high, the temperature in the northern region has continued to be high, and there has been no effective precipitation weather process for a long time, which has directly led to the continuous dry climate phenomenon in the northern region.
According to the monitoring data of the meteorological department, the rainfall in the northern region is relatively low as a whole, especially in Shandong, Jiangsu, Gansu, Henan and other places, and the rainfall in these places even has obvious "zero precipitation" weather. Under such circumstances, the local soil moisture has experienced different degrees of drought, which has a certain impact on the local wheat growth, and may even lead to a reduction in this year's summer grain production.
In order to cope with the current arid climate, relevant departments have also deployed in advance and adopted a series of drought prevention and control measures, including strengthening the construction of water conservancy projects, rationally dispatching water resources, and doing a good job in field irrigation, hoping to effectively respond to the current climate challenges of continuous drought through various measures.
3. Impact of typhoons and rainfall
In the current climatic background, whether it is typhoon or rainy weather, its impact on the continent has certain characteristics. The first is the impact of typhoons, which are affected by the strong tropical high pressure, and the overall track of this year's typhoon is westward, which may affect the eastern part of South China and the coastal areas of East China on the mainland, but its path direction is not fixed, and there is some uncertainty.
In addition, due to the combined influence of the subtropical high and the westerly trough, there may be some "typhoon rain" this year, but within the influence range of the typhoon track, such "typhoon rain" is relatively rare, which cannot effectively alleviate the local arid climate.
Compared with the southern region, the "typhoon rain" in the northern region may be more "popular", which can supplement a certain amount of rainwater resources for local farmland and reservoirs, but due to the uncertainty of the typhoon path, the probability of the northern region being really affected by the typhoon is not high, which also means that this year's typhoon season, the rainfall in the northern region may be more "lost".
In addition to the impact of typhoons, rainy weather is also a "rare guest" that is urgently needed at present, although there has been a wave of rain in Northeast China, but the timing and scope of the overall rainfall are relatively scattered, and the intensity of rainfall is relatively small, which cannot effectively improve the drought situation in the northern region.
According to the forecast of the meteorological department, although the number of typhoons this year may be more, it is expected to be 7~9, but the rainfall in the northern region is not optimistic, and the real rainy moment may have to wait until the rainy season and the rainfall process after the plum season, when it is possible to effectively alleviate the arid climate in the northern region.
Epilogue:
Although this year's typhoon season is still in its early stages, the climatic phenomena of typhoons and rainfall have begun to appear frequently, and how to effectively cope with and utilize these climatic resources has become a difficult problem in front of all localities. In the future, we not only need to pay close attention to the changes in the path of typhoons and make various preparations for typhoon prevention and resistance, but also need to strengthen meteorological disaster mitigation work, scientifically and rationally dispatch rainfall resources in various places, and help the northern region effectively survive the arid climate.
Perhaps, as the meteorological department said, this year's rain "pie" is just a little late, what we need to do is to have a pair of eyes to discover the "pie" when the "pie" comes, and have a pair of enthusiasm to welcome the "pie", so that we can truly enjoy the "sweetness" from nature.