World Climate Research Programme (WCRP) Open Science Conference; Denver, Colorado, 24–28 October 2011 The WCRP Open Science Conference (OSC), which had the theme “Climate Research in Service to Society,” was held to consult with the international community of experts on future plans and priorities for the WCRP. More than 1900 participants, including 541 young scholars from 86 nations and 300 scientists from developing nations, made the conference a success. Several major scientific priorities emerged from OSC.