摘要
利用等熵轨迹模式研究了中国北方和邻国几个大城市排放的污染物的输送趋势。计算了１９９２－１９９４年期间１，４，７和１０月的每天两次轨迹，并以这些城市为目标，对其前向或后向轨迹线上每３０ｍｉｎ的轨迹点作统计，画出等熵轨迹概率分布图。这些图形表明，等熵轨迹的概率分布能很好地反映污染物的中、远程输送且有明显的季节变化。就前向轨迹区而言，在除夏季外的其它季节里，蒙古乌兰巴托的轨迹区能覆盖到中国华北，俄罗斯的赤塔也能影响到中国东北的大兴安岭地区。
The transport of air pollutants from cities in the north of China and neighboring countries is researched by using isentropic trajectory model. The trajectories are calculated twice daily for some larger cities in January, April, July and October for the period of 1992-1994. The statistical method has been used to deal with trajectory dots at intervals of 30 minutes for the forward and backward trajectories during 0-24h and 24-48h. The probability distribution diagrams of trajectory can show clearly the ensemble properties of isentropic trajectories for each city and the dominant transport directions of pollutants. Those possess notable seasonal variations. The forward trajectory areas of China of the Ulaan Baatar in Mongolia can spread over north of China, and those of the Chita in Russia can spread over the northeast areas of China except summer. In July the forward trajectory of Pyongyang and Seoul can extend within the boundaries of China.
出处
《气象学报》
CSCD
北大核心
1997年第5期588-601,共14页
Acta Meteorologica Sinica
基金
家八五攻关项目
关键词
远距离输送
等熵轨迹
污染物
空气污染
Transport of air pollutants, Isentropic trajectory, Northeast Asia.
