Naslov
Can isolating specific cloud types provide evidence of a cosmic ray - cloud link?

Autori
Čalogović, Jaša ; Laken, Benjamin

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

Skup
Conference on Sun-Climate Connections

Mjesto i datum
Kiel, Njemačka, 16.03.2015. - 19.03.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
clouds; cosmic rays; solar activity; climate

Sažetak
A hypothesized link between the solar-modulated cosmic ray (CR) flux and Earth's cloud properties are still a contentious topic in solar-terrestrial physics. Recently, it was shown that the high noise levels present in the satellite cloud data together with incorrect methods of assessing the statistical significance may have produced false positive results in some past studies. Additionally, the recent experimental and modeling studies suggest that influence of ion-induced nucleation on clouds is globally very small or negligible. However, there still remains an open question with regards to whether or not cloud properties are influenced by CR under some specific atmospheric conditions (i.e. second-order) and over limited areas where small variations in cloud condensation nuclei (CCN) may have a large impact on clouds. One such example is that of marine stratocumulus clouds in areas of low aerosol concentrations that may be sensitive to small changes in CCN (e.g. as demonstrated by the phenomena of ship tracks). Using daily timescale epoch- superpositional (composite) analysis during Forbush decrease events, and extensive Monte Carlo simulation techniques, cloud data over 'sensitive' areas are analyzed with the aim of testing for an observable CR—cloud response.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija

POVEZANOST RADA