This resource provides an overview of the concept of climate, which may be defined as a composite of the long-term prevailing weather that occurs at a given location. The causes of different climates, such as latitude, global circulation, air masses, pressure patterns, prevailing winds, wind belts, and climate belts are discussed, along with other modifying factors such as oceans and ocean currents, mountains, and monsoons. Tropical, temperate, and polar climates are described as are continental and maritime climates and special climates like Mediterranean, desert, and savannah. Information is also available on the topics of climate change, climatology, and El Nino events.