摘要
利用TOMS大气臭氧总量格点资料分析了东北地区近6a(1996年8月—2002年7月)臭氧的分布特征、季节变化、变化趋势及其对气温变化的影响,并与1979—1992年的变化情况作了对比分析。结果表明:东北地区处于北半球大气臭氧高值中心的边缘,臭氧总量呈随纬度增加的分布形式,近6a区域年均值为361Du;冬春季总量较大、夏秋季较小,其中8月最小,3月最大;1979—1992年臭氧存在明显的下降趋势(冬季最为显著),下降趋势高纬大于低纬,近6a整个区域没有系统性下降趋势;1979—1992年对流层中下部显著变暖、对流层上层和平流层低层显著变冷,且变暖率与变冷率均随纬度增高而加大,而近6a气温变幅很小,这与臭氧变化趋势基本对应,表明臭氧的辐射加热是影响平流层低层、对流层高层温度场的重要因素,同时它对对流层低层气温的影响值得进一步关注。
Based on the TOMS data, the distribution features, seasonal changes, trends of atmospheric total ozone over Northeast China in the recent 6 years(1996-08—2002-07) and its relations with temperature are analyzed,and its variation is compared with that during 1979—1992.Results indicate that Northeast China lies on the southwest edge of the high ozone amount center of Northern Hemisphere and the regional average amount is 361Du in the recent 6 years.The amounts in spring and winter is higher than those in summer and autumn with the minimum in August and the maximum in March.Total ozone decreased at all latitude with a bigger reduction in higher latitudes during 1979—1992,while no obvious systematic reduction occurs in the recent 6 years.The temperature in the lower and middle troposphere prominently increased,the temperature in the upper troposphere and the bottom of the stratosphere distinctively decreased,and the warming and cooling rate increased with latitude.However,the variational range of temperature in the recent 6 years is very small,this basically corresponds the variational trend of ozone in the same period.The above analysis results suggest that the radiation heating of ozone is an important factor influencing the temperature field in the upper troposphere and the bottom of the stratosphere,and its effect on the temperature of the low troposphere is also worth noticing.
出处
《南京气象学院学报》
CSCD
北大核心
2004年第1期113-120,共8页
Journal of Nanjing Institute of Meteorology
基金
科技部专项资助项目
关键词
大气臭氧
年季特征
变化趋势
气温变率
东北地区
Northeast China
atmospheric total ozone
annual and seasonal feature
variational trend
temperature variation
