Complex sentence: His research focused on sea ice measurement and modelling and the HadCM3 global climate model, as well as the validation of satellite sea ice measurements against upward looking sonar observations in the Weddell Sea area.
Split into simpler sentences: His research focused on sea ice measurement and modelling, including the HadCM3 global climate model. Connolley also worked on the validation of satellite data against more direct upward looking sonar observations in the Weddell Sea area.