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Title page of J.W. Powell's 1879 Report on the Lands of the Arid Region of the United States. Report on the Lands of the Arid Region of the United States is a scientific report and policy recommendation written by American explorer, geologist, and anthropologist John Wesley Powell, and first published in 1878. The work sought to create an ...
The term "United States," when used in the geographic sense, refers to the contiguous United States (sometimes referred to as the Lower 48, including the District of Columbia not as a state), Alaska, Hawaii, the five insular territories of Puerto Rico, Northern Mariana Islands, U.S. Virgin Islands, Guam, American Samoa, and minor outlying possessions. [1]
The Gulf and South Atlantic states have a humid subtropical climate with mostly mild winters and hot, humid summers. Most of the Florida peninsula including Tampa and Jacksonville, along with other coastal cities like Houston, New Orleans, Savannah, Charleston and Wilmington all have average summer highs from near 90 to the lower 90s F, and lows generally from 70 to 75 °F (21 to 24 °C ...
The following are three major hot and dry deserts in North America, all located in the Southwestern United States and Northern Mexico. [2] The Chihuahuan Desert is the largest hot desert in North America, located in the Southwestern United States and Northern Mexico. Its total area is 140,000 sq mi (360,000 km 2).
It can be traced to Stephen H. Long's 1820 scientific expedition which put the Great American Desert on the map. [3] [4] Today the area is usually referred to as the High Plains, and the original term is sometimes used to describe the arid region of North America, which includes parts of northwestern Mexico and the American southwest.
Three level I areas were not subdivided for level 2. [2] Level III subdivides the continent into 182 smaller ecoregions; of these, 104 lie partly or wholly with the United States. [1] [3] Level IV is a further subdivision of Level III ecoregions. Level IV mapping is still underway but is complete across most of the United States.
A map claiming to show the areas of the US that may be targeted in a nuclear war that originally circulated in 2015 is making the rounds again, amid the Russian war in Ukraine.
The humid subtropical zone of the US South according to Trewartha is coloured yellow-green on this map: If using the Köppen climate classification with the 0 °C coldest-month isotherm, the subtropics extend from Martha's Vineyard, extreme SW Rhode Island, and most of Long Island to central Florida in the eastern states, include the southern ...