CLIMATE (1)

Climate Overview

  • Climate refers to the long-term pattern of weather in a region, specifically the average weather conditions over a span of 30 years or more.

  • Weather is the short-term atmospheric conditions at a specific location and time, varying from hour to hour.

Importance of Studying Climate

  • Understanding climate changes is crucial due to increasing extreme weather phenomena such as super typhoons and prolonged droughts that can severely affect living organisms.

  • Examining past climate variability is necessary for accurate predictions about future climate changes, enabling better preparedness and planning in society.

Climatology

  • Climatology is the scientific study of climate and encompasses describing climate patterns and analyzing causes and consequences of climate change.

  • Climatologists investigate long-term climate trends to assess their impact on water supply, food production, human health, and energy resources.

Impacts of Severe Climate Change

  • Severe changes in climate can lead to water and food shortages, potentially causing billions in losses and threatening vulnerable species.

  • Health impacts include increased temperatures during summer, leading to heat-related illnesses such as heatstroke and dehydration.

Climate Classification: Temperature and Precipitation

Temperature

  • Temperature indicates how hot or cold a location is, characterized by different scales like Celsius, Fahrenheit, and Kelvin.

Precipitation

  • Precipitation encompasses all water types falling from the atmosphere, including drizzle, rain, sleet, snow, and hail.

Köppen-Geiger Climate Classification

  • Developed by climatologists Wladimir Koppen and Rudolf Geiger, this classification system categorizes climates based on annual and monthly temperature averages, precipitation patterns, and vegetation types.

  • Five Main Groups:

    • Tropical or Megathermal

    • Dry

    • Temperate or Mesothermal

    • Continental or Microthermal

    • Polar

Types of Climates in the Köppen System

  1. Tropical Climates (no winter, average temp above 18°C):

    • Abundant rainfall, supporting dense rainforests.

  2. Dry Climates (deficient precipitation):

    • Characterized by constant water deficiency.

  3. Temperate Climates (mild winters):

    • Moderate temperatures and seasonal changes.

  4. Continental Climates (cold winters):

    • Significant seasonal temperature variations.

  5. Polar Climates (average temp below 10°C):

    • Includes tundra and ice caps.

Subtypes of Tropical Climates

  • Tropical Wet Climates:

    • Always hot and humid with consistent heavy rainfall.

    • Regions include low-lying lands near the equator (e.g., Philippines, Brazil).

  • Tropical Wet and Dry Climates:

    • Characterized by alternating wet and dry seasons, includes savanna landscapes.

Arid and Semiarid Climates

  • Arid Climates:

    • True desert conditions, receiving less than 25 cm of precipitation yearly.

    • Examples include the Sahara.

  • Semiarid Climates:

    • Receive 20-25 cm of precipitation, found in regions like parts of Russia and Australia.

Subtypes of Temperate Climates

  1. Marine West Coast Climate:

    • Coastal locations with cool, humid conditions (e.g., New Zealand, U.S. West Coast).

  2. Mediterranean Climate:

    • Warmer, dry summers with mild, rainy winters (e.g., parts of Italy, Greece).

  3. Humid Subtropical Climate:

    • Humid summers and diverse vegetation.

Continental Climate Types

  • Humid Continental Climate:

    • Characterized by distinct seasonal changes; found in central and northeastern Asia and North America.

  • Subarctic Climate:

    • Short summers and long, cool winters; not as warm as humid continental (found in Russia, Canada).

Polar Climates

  • Tundra Climate:

    • Very cold with no trees, specialized plants can grow. The soil is permafrost.

  • Ice Cap Climate:

    • Coldest of all climate types, experiencing permanent frigid temperatures.

Factors Affecting Climate

  • Latitude:

    • Determines distance from the equator and influences temperature zones (tropical, temperate, polar).

  • Altitude:

    • Higher altitudes often correlate with cooler temperatures; for snow-capped peaks, altitude becomes more significant than latitude.

  • Distance from Oceans:

    • Oceans moderate temperatures; coastal regions have milder conditions than inland areas.

  • Ocean Currents:

    • Influence local climates by transferring heat (warm currents) or cold (cold currents).

  • Prevailing Winds:

    • Most common wind direction affecting precipitation levels (warm air holds more moisture).

  • Mountain Ranges:

    • Act as barriers for wind, impacting local precipitation patterns (windward vs. leeward effects).