Sentences with phrase «negative ozone trends»
«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.
http://en.ilmatieteenlaitos.fi/ Not exact matches
During the period of summer ozone recovery (2000 — 2050), the SAM index exhibits weakly negative, statistically insignificant trends due to stratospheric ozone recovery which offsets the positive forcing imposed by increasing GHG concentrations.
«Here, it is sufficient to note that many of the 20CEN / A1B simulations neglect negative forcings arising from stratospheric ozone depletion, volcanic dust, and indirect aerosol effects on clouds... It is likely that omission of these negative forcings contributes to the positive bias in the model average TLT trends in Figure 6F.
The observed positive height trends over the continent may be indicative of a thermal response to greenhouse gas increases (Neff et al. 2008), counteracting the negative height trends associated with ozone depletion and the dynamical response to greenhouse gas increases (Arblaster and Meehl 2006).
Recent changes in the location of maximum spring stratospheric ozone depletion (Evtushevsky et al. 2008) may also be contributing to the negative geopotential height trends in the South Pacific sector and to the east — west asymmetry of Antarctic climate change.