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ATMO 2301 Class #9: Friday, September 18, 2009

Explore the B climate types, which occupy more area than any other climate group and are characterized by deficient precipitation throughout the year. This resource covers the distinctions of B climates, including the four subgroups: BWh (true desert), BWk (extremely dry), BSh (semi-arid), and BSk (cold in winter), along with their specific environmental contexts such as subtropical highs and leeward mountain ranges. Learn about the plants adapted to these climates and the unique vegetation found in steppe regions. Essential for students of climatology and geography.

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ATMO 2301 Class #9: Friday, September 18, 2009

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  1. ATMO 2301 Class #9: Friday, September 18, 2009 The B Climate Types The Oceans Friday, September 18, 2009

  2. The B (dry) climate types • Occupy more area than any other climate group—deficient in precipitation most of year • Have potential evaporation and transpiration that exceed precipitation • Generally occur in 2 contexts • Near the subtropical highs • On the leeward or downwind side of mountain ranges Friday, September 18, 2009

  3. B Climate Subgroups • There are four: BWh, BWk, BSh, BSk • W is a true desert, extremely dry • S is semi-arid, or steppe • h is a hot climate • K is a cold (in winter) climate • Lubbock has a BSk climate Friday, September 18, 2009

  4. Fig. 17-6, p. 477

  5. Fig. 17-7a, p. 478

  6. Fig. 17-7b, p. 479

  7. Table 17-1a, p. 480

  8. Fig. 17-2, p. 472

  9. Fig. 17-5, p. 476

  10. Fig. 17-12, p. 484

  11. Fig. 17-13, p. 484

  12. Fig. 17-15, p. 486

  13. Fig. 17-14, p. 485

  14. Fig. 17-16, p. 486

  15. More B Climate facts • Subtropical deserts extend from roughly 20-30° latitude in large continental regions, often surrounded by mountains • Xerophytes are plants capable of surviving long periods of drought—cacti, creosote bushes and short-lived plants • Steppe has characteristic vegetation—short bunch grass, scattered low bushes, sagebrush Friday, September 18, 2009

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