The National Snow and Ice Data Center, through a grant from the National Science Foundation, is modifying its facility to become one of the most energy-efficient data centers in the United States. As a part of this effort, NSIDC will shut down our computing center from Wednesday, 30 March through Sunday, 3 April to accommodate construction. The NSIDC Web site will be available intermittently during this time, providing data documentation and other information. However, access to all NSIDC data and online services will be unavailable. We apologize for any inconvenience the limited access may cause you.