Traditional Culture Encyclopedia - The 24 Solar Terms - What does cold dew wind mean?
What does cold dew wind mean?
Cold dew wind is a kind of weather that appears in Jiangnan before and after the cold dew solar terms. It is a kind of low temperature, dry (sometimes rainy) weather accompanied by strong north wind under the influence of cold air from the south or typhoon and cold air, which is very harmful to crop production. Cold dew wind is the main agrometeorological disaster in the late growth stage of late rice in South China.
Cold dew wind is a chilling injury caused by the invasion of cold air in autumn, which reduces rice production. It is one of the main meteorological disasters in the growth period of late rice in southern China, which mostly occurs around the cold dew festival of the 24 solar terms in the south. Therefore, Guangdong, Guangxi and Fujian are called cold dew wind, and the Yangtze River basin is called autumn low temperature.
Cold dew wind early warning mode:
The early warning of cold dew wind is mainly realized by long-term, medium-term and short-term forecasting of cold dew wind weather. These forecasts are mainly based on statistical forecasting and numerical weather forecasting methods. According to the historical data of cold dew wind weather and year type, through correlation analysis, various factors affecting cold dew wind are investigated and analyzed, and the circulation characteristics with high correlation with cold dew wind weather and the changes of circulation characteristics in the early stage are screened out.
The weather forecast model and climate trend forecast model of cold dew wind are established to forecast the year type and first day of cold dew wind. Using numerical forecast products, an objective forecast model of short-term cold dew wind weather is established to forecast daily cold dew wind weather. According to the cold dew wind weather forecast, combined with the development stage of late rice, early warning of cold dew wind disaster was issued.
Baidu encyclopedia-cold dew wind
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