a. The Arctic and Subarctic may be defined in several different ways, depending on whether they are looked at from the point of view of astronomy, botany, physics, climatology, ocean navigation or other specialized field. For engineering, the Arctic and Subarctic are best defined on basis of the prevailing air temperature conditions. Definitions based on air temperature are given in paragraphs 1-4a(l) and 1-4a(2). Figure 2-1 shows the limits of the Arctic and Subarctic in accordance with these definitions, together with the northern limit of trees. b. Climatic data for all stations that report to the U.S. National Weather Service are available from the U.S. Department of Commerce, National Weather Records Center, Asheville, North Carolina. In addition, climatic data for a large number of sites are given in TM 5-785/NAVFAC P-89/AFM 8829.
DesignationTM 5-852-1
EditionSep 1987
StatusSuperseded
Pages55
FunctionEngineering
CollectionRecent Archive
Public property (reproduction authorization on cover)