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This large arid region of 190,000 sq mi (490,000 km 2) includes: deserts, such as the Great Basin Desert and Sonoran Desert; and the non-desert arid region areas (with greater than 10 inches (250 mm) annual precipitation) in the Great Basin arid region, Colorado Plateau, Mexican Plateau, and others.
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 ...
West of 100°W, much of the U.S. has a cold semi-arid climate in the interior upper western states (Idaho to the Dakotas), to warm to hot desert and semi-arid climates in the southwestern U.S. East of 100°W, the climate is humid continental in northern areas (locations roughly above 40°N, Northern Plains, Midwest, Great Lakes, New England ...
Arid regions of the Western United States as mapped in 1893. Aridity is the condition of geographical regions which make up approximately 43% of total global available land area, characterized by low annual precipitation, increased temperatures, and limited water availability.
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 areas were in that category 18% of the time — or for a period of nearly four years — compared with the normal benchmark of 2%, the study found. ... In regions that are already arid to ...
The High Plains region is mostly semi-arid grassland and steppe. Today much of the region supports agriculture through the use of aquifer water irrigation, but in the 19th century, the area's relative lack of water and wood made it seem unfit for settler farming. [5]
The western areas of the basin tend to be drier than the eastern areas because of the rain shadow of the Sierra Nevada. Most of the basin experiences a semi-arid or arid climate with warm summers and cold winters. However, some of the mountainous areas in the basin are high enough in elevation to experience an alpine climate.