Climatic change in the ionosphere and upper atmosphere and its impact

0465706 - ÚFA 2017 RIV NL eng C - Konferenční příspěvek (zahraniční konf.)
Laštovička, Jan
Climatic change in the ionosphere and upper atmosphere and its impact.
Proceedings of Living Planet Symposium 2016. Vol. ESASP-740. Nordwijk: European Space Agency (ESA), 2016 - (Ouwehand, L.). ISBN 978-92-9221-305-3. ISSN 1609-042X.
[ESA Living Planet Symposium 2016. Praha (CZ), 09.05.2016-13.05.2016]
Grant CEP: GA ČR GA15-03909S
Institucionální podpora: RVO:68378289
Klíčová slova: long-term trends * ionosphere * mesosphere * thermosphere
Kód oboru RIV: DG - Vědy o atmosféře, meteorologie
http://esamultimedia.esa.int/multimedia/publications/SP-740/SP-740_toc.pdf

This paper briefly reviews long-term trends in the
mesosphere, thermosphere and ionosphere as a part
of global climate change. Anthropogenic emissions
cause cooling in the upper atmosphere due to
optical thinning of CO2 layer. CO2 is the dominant
trend driver but anthropogenic changes of
stratospheric ozone, long-term changes of
geomagnetic and solar activity, atmospheric wave
activity and water vapour content, and secular
change of the Earth’s magnetic field also play a
role. This makes the pattern of trends spatially as
well as temporally unstable. A consistent, although
incomplete, scenario of trends in the upper
atmosphere and ionosphere is presented. More
realistic height profiles of CO2 helped to reduce
substantially (or even remove) the quantitative
difference between observational and modelled
trends. Decreasing thermospheric density causes the
lifetime of orbiting space debris to increase, which
is becoming a significant threat to important
satellite technologies.
Trvalý link: http://hdl.handle.net/11104/0264149