Within the IPY-4 discipline of space research the program 'Heliosphere impact on geospace' has coordinated research in three main themes: (i) Coupling processes between the different atmospheric layers and their connection with solar activity, (ii) Energy and mass exchange between the ionosphere and the magnetosphere, and (iii) Inter-hemispheric similarities and asymmetries in geospace phenomena. In these areas IPY-4 has catalyzed multinational collaboration as several research institutes have invested on new instrumentation and on massive measurement campaigns in polar areas. Besides ground-based observations scientists have had the opportunity to harvest observations from several interesting space missions like e.g. THEMIS, Cluster, Double-Star, IMAGE, Polar, CHAMP and Envisat. This session will provide a forum for discussing new findings from IPY-4 activities related with the above listed three themes. We welcome presentations of new discoveries through observations as well as data-model comparisons. We would like to hear discussion about the remaining outstanding questions and suggestions on how they could be solved with the massive data sets which we now have in our hands. We are waiting forward to hear also about experiences collected during Outreach and Education work.