SCOSTEP is an ICSU Interdisciplinary Body tasked with the responsibility to organize long-term
scientific programs in solar terrestrial physics and Variability of the Sun and Its Terrestrial Impact (VarSITI) is that program for the period 2014 – 2018. VarSITI was defined based on a community effort in the form of a forum organized by the International Space Science Institute (ISSI) in Bern during May 7-8, 2013. The VarSITI program strives for international collaboration in data analysis, modeling, and theory to understand how the solar variability affects Earth. The VarSITI (http://www.varsiti.org/) program has four scientific elements that address solar terrestrial problems keeping the current low solar activity as the common thread: SEE (Solar evolution and Extrema), MiniMax24/ISEST (International Study of Earth-affecting Solar Transients), SPeCIMEN (Specification and Prediction of the Coupled Inner-Magnetospheric Environment), and ROSMIC (Role Of the Sun and the Middle atmosphere/thermosphere/ionosphere In Climate) (SCOSTEP-VarSITI Brochure 2013).
Katya Georgieva, VarSITI Co-chair (SRTI, Bulgaria)
Kazuo Shiokawa, VarSITI Co-Chair (CIRC/ISEE, Japan)