Changes of cooling near mesopause under global warming from observations and model simulations Mokhovстатья
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Дата последнего поиска статьи во внешних источниках: 20 марта 2018 г.
Аннотация:The results of joint analysis of temperature variations near mesopause from long-term measurements
at the Zvenigorod Scientific Station of the Obukhov Institute of Atmospheric Physics RAS in 1960–2015 and
variations of surface air temperature characterizing global climate change. Together with variations of temperature
at the mesopause Tms from measurements of the hydroxyl emissions we analyzed the temperature variations
near mesopause Tm reduced to the same level of solar activity. The observed strong decrease in temperature near
mesopause during last decades, particularly in winter, with its tendency to slow down since the 1980’s is was
detected against the background of general increase in the surface air temperature of the Northern Hemisphere
TNHs and the Earth as a whole. It was revealed a sharp drop in winter temperature near mesopause in 1970s. and
its synchronicity with the shift in climatic features at the surface associated with changes in formation of El Nino
events and their impact on the global climate. The general significant negative correlation of temperature variations
near mesopause and TNHs detected from 56-year observational data was not accompanied by any significant
coherence between the most long-period temperature variations from the cross-wavelet analysis. To assess
the possible manifestation of this coherence the results of numerical simulations with a global climate model
were used. According to model simulations for the 20–21 centuries taking into account anthropogenic forcings
for significant coherence between long-term variations Tm and TNHs the prolonged observations are required for
temperature near mesopause – about a century or more.