Clouds affect the energy Earth receives, keeps and emits back to space -- it's all a matter of balance. Dr. Bruce Wielicki is senior scientist for Earth science at NASA's Langley Research Center. His research has focused on clouds and their role in Earth's radiative energy balance for more than 25 years. He served as principal investigator on NASA's CERES science team and as co-investigator on the CALIPSO missions. NASA is now gearing up for a mission to compile the most accurate climate data ever. Dr. Wielicki is Mission Scientist for CLARREO which will provide accurate, credible and tested climate records that lay the groundwork for decisions on policies that address the effects of climate change on society. About TEDx, x = independently organized event In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)

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