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Class #12: Thursday, July 22 Climate types. Chapter 17. Global Climate. Chapter 17. A World with Many Climates. Micro, meso , macro Global Climate Climate controls Latitude Land and water Ocean currents Prevailing winds Pressure cells Mountain barriers Altitude.
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Class #12: Thursday, July 22Climate types Chapter 17 Class #12, Thursday, July 22
Global Climate Chapter 17 Class #12, Thursday, July 22
A World with Many Climates • Micro, meso, macro • Global Climate • Climate controls • Latitude • Land and water • Ocean currents • Prevailing winds • Pressure cells • Mountain barriers • Altitude Class #12, Thursday, July 22
A World with Many Climates • Global temperatures • East-west isotherms • Bends or kinks due to ocean currents and continents • Global precipitation • Precipitation occurs consistently where low pressure belts exist in the Global Circulation Model • Mountains, rain shadow Class #12, Thursday, July 22
Class #12, Thursday, July 22 Fig. 17-CO, p. 468
Class #12, Thursday, July 22 Fig. 1, p. 475
A World with Many Climates • Topic: Precipitation Extremes • Rainiest locations on windward side of mountains • Driest locations in frigid polar regions Class #12, Thursday, July 22
Climate Classification • The Ancient Greeks • Tropical, temperate, and polar zone • The Köppen System • WaldimirKöppen • Related vegetation and climate in order to predict climate types in areas without climate data • The Thornthwaite System • P/E ratio, P/E Index • Potential Evapotranspiration Class #12, Thursday, July 22
Stepped Art Class #12, Thursday, July 22 Fig. 17-6, p. 477
The Global Pattern of Climate • Tropical Moist Climates (Group A) • General characteristics: year-round warm temperatures abundant rainfall • Extent: northward and southward from the equator to about 15º to 25º • Major Types: tropical wet (Af), tropical monsoon (Am), tropical wet and dry (Aw) Class #12, Thursday, July 22
Class #12, Thursday, July 22 Table 17-1a, p. 480
Class #12, Thursday, July 22 Table 17-1b, p. 480
The Global Pattern of Climate • Dry Climates (Group B) • General Characteristics: deficient precipitation most of the year; potential evaporation and transpiration exceed precipitation • Extent: the subtropical deserts extend roughly 20º and 30º latitude in large continental regions of the middle latitudes, often surrounded by mountains • Major Types: arid (BW), semi-arid (BS) Class #12, Thursday, July 22
The Global Pattern of Climate • Observation: Deserts with Clouds and Drizzle • A desert that owes it existence, in part, to its proximity to cold ocean water and, in part, to the position and air motions of the subtropical high pressure cell. Class #12, Thursday, July 22
Class #12, Thursday, July 22 Fig. 2, p. 487
The Global Pattern of Climate • Moist Subtropical Mid-latitude Climates (Group C) • General Characteristics: humid with mil winters • Extent: on the eastern and western regions of most continents, from about 25º to 40º latitude • Major types: humid subtropical (Cfa), marine (Cfb), Mediterranean (Cs) Class #12, Thursday, July 22
The Global Pattern of Climate • Moist Continental Climates (Group D) • General characteristics: warm-to-cool summers and cold winters; winters are severe with snowstorms, blustery winds, bitter cold; climate controlled by large continents • Extent: north of moist subtropical mid-latitude climates • Major types: humid continental with hot summers (Dfa), humid continental with cool summers (Dfb), subpolar (Dfc) Class #12, Thursday, July 22
Class #12, Thursday, July 22 Table 1, p. 492
Class #12, Thursday, July 22 Fig. 3, p. 492
Class #12, Thursday, July 22 Fig. 4, p. 493
The Global Pattern of Climate • Topics: Dry Spells and Drought • Drought :a period of abnormally dry weather • Dry spell: normal seasonal dry period Class #12, Thursday, July 22
The Global Pattern of Climate • Polar Climates (Group E) • General Characteristics: year-round low temperatures • Extent: northern coastal areas of North America and Eurasia; Greenland and Antarctica • Major types: polar tundra (ET), polar ice caps (EP) Class #12, Thursday, July 22