GEO 110 Chapter Notes - Chapter 9: Sonoran Desert, 30Th Parallel North, Benguela Current
25 Jul 2016
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Desert: a region with less than 25cm of rainfall in a year. Semi-aird region: 25 to 50 cm per year. Certain conditions that causes the deserts to be unique grouped under three classes. Form close to the costal areas of the world and those that are formed on the leeward side of the mountain, and desert that reformed on high pressure zones. High pressure systems bring little to no rainfall, low pressure systems is the opposite. Hot or warm air which is forced to rise condenses to form rain and so it is characterized by heavy rainfall and dense vegetation. Cold ocean current affects land mass by pulling it down, many cold ocean currents denser in weight, characterized by descending air mass, ex cold canary current, cold benguela current, and peruvian current. California current cold and responsible for the sonoran desert in north america.
