Trends in total ozone and the effect of the equatorial zonal wind QBO |
| |
| Authors: | Marta Zossi de Artigas Patricia Fernandez de Campra |
| |
| Institution: | 1. Democritus University of Thrace, Department of Forestry and Management of the Environment and Natural Resources, GR-68200 Orestiada, Greece;2. University of Ioannina, Department of Physics, GR-45110 Ioannina, Greece;1. Beijing Weather Modification Office, Beijing, China;2. Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, China;3. Beijing Key Laboratory of Cloud, Precipitation and Atmospheric Water Resources, Beijing, China |
| |
| Abstract: | Trends in total column ozone have been analyzed in terms of the equatorial zonal wind. We used zonal monthly mean total ozone from Total Ozone Mapping Spectrometer (TOMS) and monthly mean zonal wind in the equatorial stratosphere at 30 hPa to define the phases of the quasi-biennial oscillation (QBO). Total column ozone trends have been assessed during the period 1979–2004, for both Hemispheres, and for each month, under three conditions considering, all the ozone dataset, ozone values during easterly phase and ozone values during westerly phase of the QBO. When the whole dataset is considered, negative trends are observed. From low to midlatitudes a zonal pattern is noticed with increasing negative values toward higher latitudes. When the data is filtered according to the QBO phase, statistically significant positive trends appear in the westerly case during January to May at low latitudes .The trend pattern in the case of the easterly phase presents more negative values. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
