【摘要】 利用实测资料和历史天气图资料，对近３１年我国东北地区初霜冻的天气气候特征进行了分析，并探讨了初霜冻出现前２４小时的环流形势特征和天气演变过程，给出了初霜冻的时空分布特征以及对预报有用的一些判据。对实时预报业务有参考作用。更多还原

【Abstract】 Based on the data of observations and weather charts,weather climatic features of the first frost in the northeast part of China during the latest 31 years were analyzed,and the circulation characteristics and weather developing process at the time of 24 hours before the first frost were discussed,and the geographic and space time distribution features of the first frost and some useful criteria were presented,which play a reference role in real time forecast operations.更多还原