Naslov
Testing a link between solar irradiance and cloud cover over short timescales

Autori
Čalogović, Jaša ; Laken, Benjamin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
Third Workshop - Solar influences on the magnetosphere, ionosphere and atmosphere

Mjesto i datum
Sozopol, Bugarska, 06.06.2011. - 10.06.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
total solar irradiance; TSI; UV; cosmic rays; cloud cover; solar activity; climate

Sažetak
Although over centennial and greater timescales solar variability may be one of the most influential climate forcing agents, the extent to which solar activity may influence climate over shorter time periods is still currently poorly understood. If such a link is operating, it is likely via a mechanism connected to one (or a combination) of the following three parameters: total solar irradiance (TSI), ultraviolet (UV) spectral irradiance, or the galactic cosmic ray (GCR) flux. In this work, we present an analysis based around a superposed epoch (composite) approach focusing on the largest TSI variations obtained from the Active Cavity Radiometer Irradiance Monitor (ACRIM) reconstructions occurring over short (daily) timescales. Using this composite together with the cloud data (ISCCP, MODIS) we test for the presence of a possible link between solar activity and cloud cover over large areas of the globe. The statistical significance of the obtained correlations are evaluated using rigorous statistical techniques such as Monte Carlo simulations. The relevance of our results are also examined in relation to a suggested GCR cloud cover link.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija

POVEZANOST RADA