暖区对流

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极端降水的“另类”推手——“暖区暴雨”有哪些特点?一文了解
Yang Shi Wang· 2025-08-06 09:42
Group 1 - The article discusses the occurrence of "warm zone heavy rain" in northern China, particularly during a period of continuous heavy rainfall affecting regions like Beijing and Hebei [1][4] - "Warm zone heavy rain" is characterized by strong convective precipitation triggered by small to medium-scale weather systems in a high-temperature and high-humidity environment, without significant cold air involvement [4][6] - The phenomenon is typically localized, with hourly rainfall amounts reaching 50-100 millimeters, and the affected areas may only cover a few dozen square kilometers, making forecasting challenging [4][6] Group 2 - While traditionally associated with southern China, "warm zone heavy rain" can also occur in northern regions during critical periods, such as the transition from July to August [8] - The geological conditions and vegetation distribution in northern China are less capable of handling heavy rainfall, increasing the risk of geological disasters like flash floods and mudslides [8]
“七下八上”期间降雨有何特点?如何防范?分析解读↓
Yang Shi Wang· 2025-08-03 09:44
Group 1 - The current rainfall in multiple regions coincides with China's critical flood prevention period known as "July down, August up," which is characterized by complex and severe flood conditions each year [1] - The rainfall during this period mainly presents two forms: "frontal rainstorm" and "warm area convection" [3][5] - Frontal rainstorms occur when abundant moisture from the summer monsoon meets strong cold air, leading to intense and widespread rainfall [3] Group 2 - When the influence of cold air is weak or distant, the warm moist air accumulates in northern regions, creating a hot and humid environment, which can trigger small-scale strong convection [5] - The triggers for this convection include topographical uplift of warm moist air, sea-land breezes, and low-level jet streams, but this warm area convection typically does not result in regional heavy rainfall [5]