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The decadal change of El Niño teleconnection and the corresponding response of the boreal winter stratospheric polar vortex are investigated through the composite analysis of El Niño events during the two periods 1958–78 and 1979–2015. It is found that, during the period 1958–78, El Niño generates an anomalous Aleutian low in the mid troposphere extending from northeastern Eurasia to the northeastern...
South America is one of the most vulnerable areas to stratospheric ozone depletion; consequently, an increased amount of UV radiation reaches the Earth’s surface in this region. In this study, we analyzed the long-term trend in the total ozone column (TOC) over the southern part of the South American continent from 1980 to 2009. The database used was obtained by combining several satellite measurements...
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