Analysis of total ozone trends and their affecting factors over the North Pacific Ocean

作者：Han Shuang-Shuang; Huang Fu-Xiang^*; Chen Xi; Xia Xue-Qi

来源：Acta Geophysica Sinica, 2016, 59(11): 3974-3984.

DOI：10.6038/cjg20161104

• North Pacific Ocean
• Total ozone
• EESC
• Solar
• QBO
• ENSO

Based on satellite remote sensing datasets of total ozone during the period of 1979 to 2014, this paper simulates these data using a multivariate linear regression model to investigate the long-term trends of total ozone over the North Pacific Ocean and to assess the impact of each factor on the distribution of the ozone. The results show that the total ozone in the North Pacific Ocean decreased over the years. However, the rates varied with different seasons and latitudes, and the ozone decreased most significantly during the seasons in which the ozone level was at its maximum. In the range of 0 degrees-15 degrees N, the high ozone value appeared in the summer and autumn, during which the mean decline rate was about 0. 2DU/a, then reached its peak in August. In the range of 15 degrees-30 degrees N, the high value appeared in the spring and summer, during which the mean decline rate was about 0. 22DU/a, then reached its peak in May. In the range of 30 degrees-45 degrees N, the high ozone value appeared in the winter and spring, during which the mean decline rate was about 0. 75DU/a, then reachesd its peak in February. The factors influencing the distribution of ozone considered in this article include the equivalent effective stratospheric chlorine (EESC) solar, quasi-biennial oscillation (QBO) and El Nino-southern oscillation (ENSO). Among these, the ozone depletion caused by EESC increases with the increasing latitude, and the maximum losses are 11DU, 16DU and 66DU, respectively. The enhancement of solar will increase the ozone level, and the maximum effects in the three dimensions are 16DU, 17DU and 19DU, respectively. The contributions of QBO@10 hPa and QBO@30 hPa to the ozone are all about +/- 10DU, except for QB@10 hPa on 30 degrees-45 degrees N which reaches 14DU. Worth noting is that the ozone changes and QBO have the same phase in the range of 0 degrees-15 degrees N, while in the ranges of 15 degrees-30 degrees N and 30 degrees-45 degrees N they have the opposite phases. The effects of ENSO are present within +/- 10DU at all latitudes, and show phase differences at different latitudes as well. The ozone changes in the ranges of 0 degrees-15 degrees N and 15 degrees-30 degrees N have opposite phases to ENSO, while those in the range of 30 degrees-45 degrees N are consistent with the phase of ENSO.

• 出版日期2016-11
• 单位国家卫星气象中心; 中国地质大学（北京）