DoD Directive 4715.21: Climate Change Adaptation and Resilience, January 14, 2016 [open pdf - 332KB]
"In accordance with the direction in Executive Order 13653, this issuance establishes policy and assigns responsibilities to provide the DoD with the resources necessary to assess and manage risks associated with the impacts of climate change. This involves deliberate preparation, close cooperation, and coordinated planning by the DoD to:  Facilitate federal, State, local, tribal, private sector, and nonprofit sector efforts to improve climate preparedness and resilience, and to implement the 2014 DoD Climate Change Adaptation Roadmap.  Help safeguard U.S. economy, infrastructure, environment, and natural resources.  Provide for the continuity of DoD operations, services, and programs."
DoD Directive 4715.21; Department of Defense Directive 4715.21
Defense Technical Information Center: http://www.dtic.mil/