Number of Atlantic Tropical Cyclones by Month (1851-2018)

Source: NOAA Hurricane Research Division. The northern Atlantic is an area of hurricane activity mainly impacting the Caribbean, the Gulf of Mexico, and the Eastern Seaboard. Atlantic tropical cyclones usually emerge in the mid The month of September represents peak cyclone activity over two dimensions, the first being the largest

Land Covered by Permafrost

Source: Brown, J., O. Ferrians, J. A. Heginbottom, and E. Melnikov (2002) Circum-Arctic Map of Permafrost and Ground-Ice Conditions, Version 2. Boulder, Colorado, USA. NSIDC: National Snow and Ice Data Center. Due to their geographical attributes, northern areas have unique constraints on developing and operating their transport infrastructures. One of