近年梅县地面最低温度偏高出霜情况分析

Meixian ground lowest temperature higher has the frost analysis in recent years

在我市多年的地面观测中,发现地面温度在0℃以上时,仍有霜出现。而近年随着自动气象站资料在我省的业务运用,在梅县发现地面最低温度在3℃左右甚至5℃时也有霜的记录。本文分析自动站地面最低温度比人工站高的原因、探讨下垫面状况、地面辐射等因素对霜形成的作用,结果表明:在气温较低,地面最低温度在3℃或者以上时,水汽也能在草面上凝结成霜。

During surface observation many years in our city, it discovered the ground temperature above zero degree still has the frost. Along with automatic weather station＇s data applies to our province service utilization recent years, it discovered ground lowest temperature is at 3 degrees or even at 5 degrees also appearing the frost record in Meixian. This article analyzes the reason why automatic station surface lowest temperature higher than artificial station, sis cusses lower pad surface condition, and surface radiation the which forms to the frost. The result indicated when the temperature is low or ground lowest temperature is at 3 degrees or above, the water vapor also can congeal the frost on the grass surface.