皖北地区对流层顶气象特征分析

Weather Characteristics of Tropopause in Northern Anhui

利用阜阳高空气象站2007—2011年08时的对流层顶气象资料,运用统计学方法,对皖北地区两类对流层顶的气象特征进行分析。结果表明:极地类对流层顶与热带类对流层顶大部分时间并存于皖北地区上空,7、8、9月极地类对流层顶消失;热带类对流层顶的高度先扬后抑,5月最高,11月最低,温度先降后升,12月最高,9月最低;极地类对流层顶的高度上半年不断抬高,下半年依次走低,温度年头高、年中低;两类对流层顶季节性特征的变化大体上呈正相关关系,极地类对流层顶季节性变化较大。

Using 08 o＇clock tropopause meteorological data from high altitude weather stations from 2007 to 2011 in Fuyangwith statistical methods, the meteorological characteristics of two types of tropopause in northern Anhui are analyzed. Results show that the polar tropopause and tropical tropopause over Wanbei area in most of the time and the polar tropopause disappear in July, August and September; The height of tropical tropopause went up first and then down, which reached the highest in May andlowest in November while the temperature of it droped first and then raised, which reached the highest in December and lowest in September; the height and temperature of the polar tropopause went up during the first half of year and deceased in the second half of year; generally, the seasonal changes of the two types of tropopause positively correlated and the seasonal variation of polar tropopause was larger.