龙凤山和瓦里关臭氧总量异常变化与天气过程关系研究

通过对黑龙江龙凤山和青海瓦里关Brewer 地基臭氧总量的长期观测资料以及与观测时段对应的全球 NCEP R1 系列位势高度再分析资料的统计分析发现, 龙凤山和瓦里关臭氧总量观测值有时存在剧烈的逐日变化, 对这种异常变化进行定量分析, 并对其与对流层天气过程的关系进行研究, 发现两者之间存在良好的对应关系。臭氧总量的异常变化大多数出现在11 月至次年5 月的冬、春季节, 并且臭氧总量的异常升高(第一类异值点)总是伴随着平流层低层(250~70 hPa)的槽线和地面(1000 hPa)的低压中心后方的天气形势, 而臭氧总量的异常降低(第二类异值点)则时常伴随平流层低层的脊线和地面的高压中心后方的天气形势, 这表明臭氧总量的异常变化可以作为地面天气系统转变的一个信号。

Variations in Total Ozone Observed at Longfengshan and Waliguan and Its Relationship with Synoptic Process

Longtime in-situ measurements of total ozone from the ground-based Brewer observatories at Longfengshan in Heilongjiang Province and Waliguan in Qinghai Province were analyzed together with the according geopotential height data from NCEP R1 reanalysis series. Abnormal day-to-day fluctuations in the total ozone amount were found at times, which were analyzed in respect to synoptic processes. Results show that the impact of synoptic conditions is highly related to the variation of the total ozone amount. The anomaly in total ozone amount mostly appears in winter and spring (from November to May in the following year). The abnormal high total ozone amounts (the first kind of abnormal data points) always occur when the station is at the rear of the near surface (1000 hPa) cyclone with a simultaneous air pressure trough approaching in lower stratosphere (250 to 70 hPa). The abnormal low total ozone amounts (the second kind of abnormal points) always occur when the station is behind a near surface anticyclone with a simultaneous air pressure ridges approaching in lower stratosphere. The anomaly in total ozone amount can be considered as a signal for the upcoming transition between near surface cyclone and anticyclone.