摘要
本文利用常规气象观测资料、EOS/MODIS卫星遥感资料以及NCEP再分析资料,对2010年4月13-15日豫西、豫北一带冬麦区出现的晚霜冻害进行分析,结果表明:此次霜冻由来自超极地路径的冷空气经寒潮关键区后入侵河南,与后期补充南下冷空气的共同作用形成,高空500 hPa主要影响系统为旋转南下的横槽。这种类型的冷空气活动在春季更易给豫西北、豫西带来强降温、霜冻害天气。而前期气候干旱导致土壤失墒,易发生霜冻害;当时小麦正处于拔节-抽穗的低温敏感期,抗寒能力较弱,加重了霜冻害程度。
Based on the conventional meteorological observations data and EOS/MODIS satellite remote sensing data and NCEP reanalysis data,the weather process of late frost occurred in the west and north of Henan province during 13 and 15 April 2010 were analyzed.The main conclusions are as follows: the cold air activity belongs to the typical super polar path entering the cold wave critical zone before,by the middle path of invasion of China after entering the cold wave critical zone,in the late stage the other air were supplemented gradually and moved to the south.This type of cold air activities are more easily bring strong cooling and frost weather in the northwest and west of Henan province in spring.The type of mainly affects system belongs to the transversal trough spin to south at 500 hPa.As the drought in the early stage led to loss of soil moisture,frost injury prone;the wheat crop is in the jointing-heading the low-temperature sensitive period,cold and weak,increase the frost level.
出处
《气象与环境科学》
2012年第1期43-48,共6页
Meteorological and Environmental Sciences
基金
中国气象局农业气象保障与应用技术重点开放实验室基金项目"河南省冬麦区晚霜冻的预报方法研究"(AMF201104)资助
关键词
低温
超极地路径
混合型霜冻
拔节期
low temperature
over polar paths
mixed frost
jointing stage
