北太平洋上空臭氧总量长期变化趋势及其影响因素分析

发布时间：2018-03-12 09:50

本文选题：北太平洋　切入点：臭氧总量　出处：《地球物理学报》2016年11期 　论文类型：期刊论文

【摘要】：本文基于1979—2014年臭氧总量的卫星遥感数据,利用多元线性回归模型对臭氧总量数据序列进行模拟计算,考察了北太平洋上空臭氧总量长期变化趋势及其影响因素的作用.结果表明,北太平洋地区大气臭氧总量长期变化呈现减少趋势,但是减少速率随季节和纬度带表现出差异性,在各纬度带臭氧峰值季节臭氧下降趋势最为显著.在0°—15°N地区臭氧高值出现在夏秋季节并在8月达到峰值,峰值月份臭氧年均下降率约为0.2DU/a;15°—30°N亚热带地区臭氧高值出现在春夏季并在5月达到峰值,峰值月份臭氧年均下降速率约为0.22DU/a;而在30°—45°N中纬度地区臭氧高值出现在冬春季并在2月达到峰值,峰值月份臭氧年均下降率0.75DU/a.在臭氧分布年平均态基础上,影响臭氧总量分布变化的因素主要有臭氧损耗物质(EESC)、太阳辐射周期(Solar)、准两年振荡(QBO)和厄尔尼诺-南方涛动(ENSO)等.其中,EESC导致臭氧损耗效应随着纬度升高而增大,在从低到高的三个纬度带损耗最大值分别为11DU、16DU和66DU;Solar增强导致臭氧增加,在三个纬度带的增加效应最大值分别为16DU、17DU和19DU;QBO@10hPa和QBO@30hPa对臭氧影响幅度基本在±10DU内波动,只有QBO@10hPa对30°—45°N区域的影响作用达到14DU,值得注意的是QBO影响作用随着纬度变化存在相位差异,在0°—15°N区域臭氧变化与QBO呈现相同相位,而在15°—30°N和30°—45°N区域臭氧变化与QBO呈现相反相位;ENSO对各个纬度带臭氧影响幅度也在±10DU内,ENSO影响作用在不同纬度带也存在相位差异,臭氧总量变化在0°—15°N、15°—30°N区域与ENSO相位相反,在30°—45°N区域与ENSO相位一致.
[Abstract]:Based on the satellite remote sensing data of total ozone amount from 1979 to 2014, the series of ozone total data is simulated and calculated by multivariate linear regression model. The long-term variation trend of total ozone over the North Pacific and its influence factors are investigated. The results show that the long-term variation of total ozone over the North Pacific shows a decreasing trend, but the reduction rate varies with seasons and latitudes. The decrease trend of ozone peak seasonal ozone was the most obvious in different latitudes. The high ozone value appeared in summer and autumn season in 0 掳-15 掳N region and reached its peak value in August. The average annual decrease rate of ozone in peak month is about 0.2DU / a ~ (15 掳-30 掳N) in the subtropical region, which appears in spring and summer and reaches its peak in May. The average annual decline rate of ozone in peak month is about 0.22 du / a, and the high ozone value in mid-latitude of 30 掳-45 掳N appears in winter and spring and reaches its peak on February. The average annual decline rate of ozone in peak month is 0.75 du / a. Based on the annual average state of ozone distribution, The main factors affecting the total ozone distribution are EESCG, the solar radiation cycle, the quasi-biennial oscillation (QBOO) and the El Nino Southern Oscillation (ENSO), among which the ozone loss effect increases with the increase of latitude. The maximum loss in the three latitudes from low to high is 11DU 16DU and 66DUU solar enhancement, respectively, and the maximum increase effect in the three latitudes is 16DU 17DU and 19DUQBODER 10hPa and QBO@30hPa, respectively, and the range of ozone effects fluctuates in the range of 卤10DU, respectively. Only the effect of QBO@10hPa on 30 掳-45 掳N region reached 14DU. It is worth noting that there is phase difference between QBO effect and QBO in the range of 0 掳-15 掳N, and the change of ozone in 0 掳-15 掳N region is the same as that of QBO. However, in the regions of 15 掳-30 掳N and 30 掳-45 掳N, the change of ozone in the region of 15 掳-30 掳N and 30 掳-45 掳N was opposite to that of QBO, and there were also phase differences in different latitudes in the range of 卤10DU. The change of total ozone content in 0 掳-15 掳N 15 掳-30 掳N region was opposite to that of ENSO in the range of 0 掳-15 掳N and 15 掳-30 掳N, respectively. In the range of 30 掳-45 掳N, the phase of ENSO is the same.
【作者单位】：中国地质大学(北京)地球科学与资源学院;国家卫星气象中心;
【基金】：国家自然科学基金项目(41275035) 公益性行业(气象)科研专项(GYHY201206015)资助
【分类号】：P732.1

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