摘要
为研究青藏高原上空臭氧的时空演变特征,利用1979年1月-2018年12月的MSR2臭氧总量月平均资料,通过气候统计学方法,对青藏高原上空臭氧总量的时空分布以及臭氧低谷强度变化特征进行分析。结果表明,青藏高原上空的臭氧总量分布具有明显的纬向特征,随纬度增高而增大,也存在明显的季节变化,冬春季较多,夏秋季较少;青藏高原上空臭氧总量在不同时期段的变化趋势表现不同,在1979-1998年呈递减的趋势,其递减率为0.65 DU/a,在1999-2018年呈递增的趋势,其递增率为0.20 DU/a,而1979-2018年整体呈现递减的趋势,其递减率为0.16 DU/a,且存在显著的准2~3年、准4年和准8~11年周期振荡;青藏高原上空臭氧总量的季节变化呈现正弦曲线的形状,最大值出现在3月,最小值出现在10月,而同纬度的无山地区的最大值出现在4月,最小值出现在11月。高原上空臭氧总量一年四季都低于同纬度带无山地区,且在各月(除10月)均呈现下降的趋势;臭氧低谷的强度在5月达到最强,11月最弱,且在夏秋季节呈现缓慢减弱的趋势,而在冬春季节呈现加强的趋势。
In order to study the temporal and spatial evolution characteristics of ozone over the Tibetan Plateau,the monthly average data of total ozone in MSR2 from January 1979 to December 2018 were used to analyze the temporal and spatial distribution of ozone and the intensity of ozone troughs over the Tibetan Plateau through climatic statistics method.The results show that the total distribution of ozone over the Tibetan Plateau has obvious zonal characteristics,which increases with the increase of latitude,and also has obvious seasonal changes.The change trend of total ozone over the Tibetan plateau is different in different periods.During the period of 1979-1998,it has a trend of declining,the decline rate was 0.65 DU/a;during 1999-2018,it showed a trend of increase,the increasing rate of 0.20 DU/a;and during 1979-2018,it exhibits a decreasing trend,the decline rate is 0.16 DU/a,and there is a significant quasi 2-3 years,4 years and 8-11 years of periodic oscillation during this period;The seasonal variation of total ozone over the Tibetan Plateau shows a sinusoidal curve.The total ozone over the Tibetan Plateau reaches the highest value in March and the lowest value in October.The maximum amount of total ozone over the same latitude,where in non-mountain areas,appeared in April and the minimum in November.The total amount of ozone over the Qinghai-Tibet Plateau is lower than that of mountainless areas in the same latitudes throughout the year and shows a downward trend in each month except of October.The intensity of the ozone trough over the Tibetan Plateau reached the strongest in May,the weakest in November,It showed a slowly decreasing trend in summer and autumn and a strengthening trend in winter and spring.
作者
熊思章
陈权亮
XIONG Sizhang;CHEN Quanliang(College of Atmospheric Sciences,Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,Chengdu University of Information Technology,Chengdu 610225,China)
出处
《成都信息工程大学学报》
2020年第6期671-677,共7页
Journal of Chengdu University of Information Technology
基金
国家自然科学基金资助项目(41875108)
四川省科技厅应用基础研究资助项目(2019YJ0363)
关键词
大气科学
气候变化
青藏高原
臭氧总量
时空分布
atmospheric sciences
climate change
The Tibetan Plateau
total ozone
temporal and spatial distribution
