Solar irradiance, cosmic rays and cloudiness over daily timescales
Latest publications
Written by Jaša Čalogović Tuesday, 20 December 2011 00:00
Although over centennial and greater timescales solar variability may be one of the most influential climate forcing agents, the extent to which solar activity influences climate over shorter time periods is poorly understood. If a link exists between solar activity and climate, it is likely via a mechanism connected to one (or a combination) of the following parameters: total solar irradiance (TSI), ultraviolet (UV) spectral irradiance, or the galactic cosmic ray (GCR) flux. We present an analysis based around a superposed epoch (composite) approach focusing on the largest TSI increases and decreases (the latter occurring in both the presence and absence of appreciable GCR reductions) over daily timescales...
GRL website
Cosmic ray modulation by different types of solar wind disturbances
Latest publications
Written by Mateja Dumbovic Tuesday, 20 December 2011 00:00
The amount of the galactic cosmic rays (primarily protons) that hit the Earth is greatly influenced by the solar activity. On the short time scales it can be substantially reduced by the passing of solar wind disturbances, such as interplanetary coronal mass ejections (ICMEs) and corotating interaction regions (CIRs). The resulting short-term cosmic ray depressions are generally denoted as Forbush decreases. We present a systematic statistical study of various aspects of Forbush decreases. The analysis is based on ground-based neutron monitor data and the in-situ solar wind data recorded by the Advanced Composition Explorer (ACE) satellite and provides empirical background for physical interpretations of short-term cosmic ray modulations.
read publication (A&A website)
First announcement - XIth Hvar Astrophysical Colloquium
Latest news
Tuesday, 01 November 2011 03:12

first announcement
further details & registration
First announcement - XIIth Hvar Astrophysical Colloquium
Latest news
Tuesday, 01 November 2011 03:12


further details & registration
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