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霜冻的形成与规律霜,就是当近地面层温度降到0℃以下时,物体表面形成的白色冰霜,一般称为“白霜”。有时,近地面层温度虽已降至0℃以下,由于天阴有风,或空气中水汽过少,无“白霜”形成,但已给作物带来一定影响,这种低温、冷冻情况,群众称为“黑霜”,气象上称为“冻”。霜(白霜)和冻(黑霜),气象上统称为“霜冻”。霜冻都是由于气温降至0℃以下所形成,根据其发生原因,可分为“平流霜冻”、“辐射霜冻”、“平流辐射霜冻”三种。“平流霜冻”主要发生在寒潮或冷空气入侵的时候;“辐射霜冻”与土壤、植被在夜间辐射冷却有关,往往出现在冬季、春季,风小无云的夜间;由平流冷却和辐射冷却两种成因结合形成的“平流辐射霜冻”,多发生在
The formation of frost and the law of frost, that is, when the surface temperature near the ground below 0 ℃, the formation of white frost objects, commonly known as “hoar frost.” Sometimes, the temperature of the near surface layer has dropped below 0 ° C, and no “white frost” has formed due to overcast days or too little water vapor in the air, but this has brought certain impacts to crops. Such low temperature and freezing conditions, The masses call it “Black Cream” and the weather is called “frozen.” Cream (white frost) and frozen (black cream), meteorological collectively referred to as “frost.” Frost are due to the temperature dropped to below 0 ℃ formed, according to its causes, can be divided into “advection frost”, “radiation frost”, “advection radiation frost” three. “Stratosphere frost” mainly occurs when cold wave or cold air invades; “Radiation frost” is related to radiation and cooling of soil and vegetation at night, often occurs in winter and spring, The causes of the formation of a combination of “stratospheric radiation frost,” occurred in more