National Centers for Environmental Information (NCEI), headquartered in Asheville, North Carolina, is the world's largest active archive of environmental data. In 2015 it was established from the merger of the National Climatic Data Center (NCDC), the National Geophysical Data Center (NGDC) and the National Oceanographic Data Center (NODC). The current director is Thomas R. Karl, who was the director of NCDC before merger.