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Chapter 8: Climate. Wladimir Köppen 1846-1940. A Climates—no seasons, constant temperature, varying precipitation. Af climate—Tropical Rainforest. Am Climate—Tropical Monsoon. Aw Climate—Tropical Savanna Why the dry season?. C Climates—mild winters, varying precipitation.
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Chapter 8: Climate Wladimir Köppen 1846-1940
A Climates—no seasons, constant temperature, varying precipitation
Aw Climate—Tropical Savanna Why the dry season?
C Climates—mild winters, varying precipitation San Francisco, CA Chengdu, China Columbia, South Carolina Cfb Csa, Csb Cfa Cwa Any pattern to where C climates are located? Why do C climates extend into the upper latitudes on west coasts (northern hemisphere) but not on east coasts?
Cfa—Humid Subtropical Cwa—Humid Subtropical, dry winter
Cfb—Marine West Coast Rain all year, cool Wettest climate in the mid-latitudes
CsavsCsb climates—Mediterranean hot summer & mild summer climates—can exist as close as 20 miles from each other!
D climates—severe winter (at least one month average below freezing) Verkhoyansk, Russia Churchill, Manitoba Moscow, Russia New York, NY Dailan, China Dfa Dfb Dfc, Dfd Dwc, Dwd There are no D climates in the southern hemisphere—why?
Dfa Humid Continental DwaHumid Continental, dry winter
Dfb Humid Continental Cool Summer
B Climates—deserts & steppes Areas with relatively high annual precipitation can be deserts (or steppes)if temperatures are high. Albuquerque, NM ArRiyad, Saudi Arabia BS (mid-latitudes)—steppes Transitional ZonesCool or hot summers BSH, BSK BW (subtropics)—deserts Cool or hot summersBWh, BWk
Why such extensive aridityin the western U.S.? Mojave Desert Atacama Desert
In addition to the influence of the STH, deserts are determined by: --mountain barriers (think of the western U.S.) --colder ocean currents (think of the coast of Chile)
Proximity to cold ocean currents intensifies aridity, but can also produce important coastal fog belts.
BWh Subtropical Desert Hot summers BWk Mid-latitude desert Cool summer
BSh—Usually just outside of the hot deserts of the tropic These are transitional climates between desert and more humid areas. Precipitation is usually less than 23.6 inch/year. On outskirts of Sahara Desert and in Middle East.
BSk—Usually poleward of 30° and the mid-latitude deserts. In these climates, precipitation is usually convective, so occurs in summer. However, in places like Semey, there are cyclonic storms that impact the area, they just do not bring much moisture with them. BSk— mid-latitude cold steppe climates