摘要:
从1994年8月至1995年8月，在龙凤山、临安大气污染监测站和瓦里关大气本底基准观象台对O3、NOX及SO2首次进行了长期的连续观测。初步分析表明：3站地面O3的平均浓度、月际分布和日变化特征因地理环境、海拔高度和天气条件的不同，表现出明显的差异性。平均地面O3浓度，龙凤山为34.8×10-9,临安为39.1×10-9,瓦里关山为49.3×10-9,龙凤山和临安的月平均地面O3浓度分布较复杂，在6～7月和12月～1月较低，10月底～11月初较高。而在瓦里关山，月平均地面O3浓度变化较平稳，6月份最大，12月最小。龙凤山和临安地面O3平均日变化量较大，下午浓度最高，清晨最小；而瓦里关山地面O3平均日变化较小，上午浓度略低；NOX和SO2的分布具有明显的局地性特征，在龙凤山，临安和瓦里关山，3站的总平均浓度分别为2.7×10-9（NOX）和0.7×10-9(SO2),8.1×10-9(NOX)和16.1×10-9（SO2），0.04×10-9（NOX）和0.15×10-9（SO2）。
Abstract:
From August 1994 to August 1995, the continuous in-site measurements of surface O3, NOX and SO2 have been made in three sites of China which are Lin’an, Longfengshan background stations, and Waliguan baseline observatory. The preliminary analysis of the data indicates that the average concentration, monthly and diurnal change of surface O3 mainly depend on geographic environment, sea level and weather conditions. During the priods of measurement, the average concentrations of surface O3 are 34.8×10-9 in Longfengshan, 39.1×10-9 in Lin’an and 49.3×10-9 in Waliguan, respectively. The monthly average concentrations of surface O3 are quite different in these sites, in Lin’an and Longfengshan, O3 concentrations show lower in December and January, and in June and July, respectively, and higher from the end of October to early November, while in Waliguan, the monthly variation of O3 concentration is much smaller, the lowest value in December, and the highest in June. The diurnal variation of surface O3 concentration shows an obvious diurnal cycle with a maximum in the afternoon and a minimum in the early morning in Longfengshan and Lin’an, but with a small diurnal variation in Waliguan. The distributions of NOX and SO2 show an obvious local characteristies, the average concentrations are 2.7×10-9 (NOX) and 0.7×10-9 (SO2), 8.1×10-9 (NOX) and 16.1×10-9 (SO2), 0.04×10-9 (NO2) and 0.15×10-9 (SO2), respectively in Longfengshan, Lin’an and Waliguan stations
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