Droughts in the United States

Drought in the United States is similar to that of other portions of the globe. Below normal precipitation leads to drought, and is caused by an above average persistence of high pressure over the effected area. Changes in the track of extratropical cyclones, which can occur during climate cycles such as the El Niño-Southern Oscillation, or ENSO, as well as the North Atlantic Oscillation, Pacific Decadal Oscillation, and Atlantic multidecadal oscillation, modulate which areas are more prone to drought. Increased drought frequency and severity is also expected to be one of the effects of global warming.

Droughts in the United States

Drought in the United States is similar to that of other portions of the globe. Below normal precipitation leads to drought, and is caused by an above average persistence of high pressure over the effected area. Changes in the track of extratropical cyclones, which can occur during climate cycles such as the El Niño-Southern Oscillation, or ENSO, as well as the North Atlantic Oscillation, Pacific Decadal Oscillation, and Atlantic multidecadal oscillation, modulate which areas are more prone to drought. Increased drought frequency and severity is also expected to be one of the effects of global warming.