Climatology

Traps in Climatology

• Uses the wrong operation
  Picture the situation (higher = colder; back bearing = ± 180°) before choosing the operation.
• Forgets to apply the lapse rate
  Temperature fall = height (km) × 6.5 °C. Then subtract the fall from the base temperature.
• Stops at an intermediate value
  Check the final number answers the question asked (temperature AT the summit, not the change).
• Picks a closely related feature or term
  Learn related features as contrasting pairs: how each forms and what it looks like.
• Confuses climatic types/features
  Equatorial: rain all year, small annual temperature range. Savanna: distinct wet and dry seasons. Hot desert: very low rainfall, high diurnal range.
• Reverses the process or effect
  Trace the cause and effect step by step and check the direction at each step.
• Confuses weather instruments
  Baro- = pressure; hygro- = humidity; anemo- = wind speed; wind vane = direction; rain gauge = rainfall; Six's thermometer = max/min temperature.
• Over-generalises a pattern
  Geographic patterns have exceptions; be wary of always/never/all.
• Pressure and wind errors
  Winds blow from HIGH to LOW pressure, deflected by the Coriolis force (right in N hemisphere). Trade winds blow toward the ITCZ/doldrums; westerlies blow poleward.
• Confuses rotation and revolution
  Rotation (24 h) → day and night. Revolution (365¼ days) with the tilted axis (23½°) → seasons and changing day length.
• Confuses types of rainfall
  Convectional: intense surface heating (equatorial afternoons). Relief/orographic: air forced over highlands (windward wet, leeward rain shadow). Frontal/cyclonic: warm air rises over cold air (temperate).
• Map reading errors
  Close contours = steep slope; wide = gentle. Gradient = vertical interval ÷ horizontal equivalent (same units). Four-figure grid ref: eastings first, then northings.
• Chooses a true but irrelevant statement
  Test each option against the exact term or feature in the stem.
• Uses an everyday idea instead of the geography
  Test the intuition against the physical process; geography terms and causes often differ from their everyday sense.
• Confuses atmospheric layers and cloud types
  Troposphere: weather occurs; temperature falls with height. Stratosphere: ozone layer. Cumulonimbus: towering thunder clouds; cirrus: high wispy ice clouds; stratus: low grey sheets; nimbostratus: steady rain.
• Confuses ocean currents and their effects
  Cold currents (Canary, Benguela, Humboldt/Peru, Labrador) cool coasts and contribute to coastal deserts (Namib, Atacama) and fog. Warm currents (Gulf Stream/North Atlantic Drift, Guinea, Kuroshio) warm coasts. Mixing of warm and cold water favours plankton and fishing grounds.
• Picks the wrong place or location
  Learn each resource or feature with its location on a map, and the reason it occurs there.
• Climate classification errors
  Equatorial: hot, rain all year, small range. Tropical continental (savanna): wet summer, dry winter. Hot desert: very low rain, large daily range. Mediterranean: hot dry summers, mild wet winters (west coasts 30–40°). Monsoon: seasonal reversal of winds, very heavy summer rain.
• Confuses vegetation belts and their characteristics
  Rain forest: evergreen, layered, buttress roots, hardwoods. Savanna: tall grass with scattered trees, deciduous in dry season. Mangrove: stilt/aerial roots on tidal coasts. Coniferous (taiga): needle leaves, softwood. Mediterranean: evergreen with waxy/thick leaves. Tundra: mosses, lichens.
• Latitude and longitude errors
  Latitude: angular distance N/S of the equator (parallels). Longitude: angular distance E/W of the Greenwich meridian. Tropics 23½°; Arctic/Antarctic Circles 66½°; International Date Line ≈ 180°; 15° of longitude = 1 hour; 1° = 4 minutes.