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Space Climate Symposium, September 19-22, 2022

Krakow, Poland
Fully on-site meeting

Space Climate 8 Meeting Abstract

How does Troposphere respond to Sun’s mood changes?

Mirela Voiculescu (University Dunarea de Jos Galati, Romania)


The effect of solar variability on tropospheric process and, consequently, the impact on climate variability is still unknown, despite increasing research efforts. Both recent and old results show that solar variability and space weather may impact on, e.g., atmospheric pressure, atmospheric circulation, cloud cover, precipitation, air and sea surface temperature. However, correlations at both long-term and daily scale reported for various parameters are contradicted by opposing opinions stating that correlations might be random or they are affected by artefacts. Complications arise also from the fact that the solar signal is relatively weak, secondary or cascade-like atmospheric processes may mask or hide their solar origin, some of the decadal atmospheric oscillations may coincide with the solar cycle for particular periods, to list just a few. Long term continuity at global scale is still problematic for e.g. cloud cover and how the cloud microphysics affects their radiative budget is not understood. Lagged responses, at millennial scale, of oceans to solar triggers are also important. Solar radiation is the first solar trigger that comes to mind when discussing tropospheric processes, however solar wind/space weather phenomena that may affect the global electric circuit may also produce changes in various tropospheric fields. We review here results showing solar fingerprints identified in various tropospheric processes and/or parameters and discuss their reliability and synergy. Possible mechanisms connecting tropospheric processes to various solar proxies as solar radiation, cosmic rays, solar wind are also briefly presented.

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