«By merging the ESA Climate Change Initiative's data with NASA's, we clearly see
negative ozone trends in the upper atmosphere before 1997 and positive trends after,» concludes Viktoria Sofieva, Senior Research Scientist at the Finnish Meteorological Institute.
NOAA scientists will systematically
analyze ozone trend data and interpret findings at a level of integration and understanding never before achieved.
Larger circles indicate sites where there is greater certainty about
the ozone trend.
«This is very important research because it is the first time that a slowing has been shown in an region of the atmosphere where chlorine has been demonstrated to affect
the ozone trend,» says Neil Harris, from the European Ozone Research Coordinating Unit in Cambridge, UK.