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GLOBAL CLIMATE CHANGE

GLOBAL CLIMATE CHANGE. September 26. Global Climate Changes. Global Temperature INCREASED 1.5 °F average temperature since 1880. Land Ice DECREASED 100 Billion Tons per Year in Greenland. Sea Level INCREASED 3.19 mm per year. Arctic Sea Ice DECREASED 12% per decade. Carbon Dioxide

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GLOBAL CLIMATE CHANGE

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  1. GLOBAL CLIMATE CHANGE September 26

  2. Global Climate Changes • Global Temperature • INCREASED 1.5 °F average temperature since 1880

  3. Land Ice • DECREASED 100 Billion Tons per Year in Greenland

  4. Sea Level • INCREASED 3.19 mm per year

  5. Arctic Sea Ice • DECREASED 12% per decade

  6. Carbon Dioxide • INCREASED 393 parts per millino

  7. In the last 65,000 years there have been 7 cycles of glacial advances and retreats. How many fluxes of CO2 have there been? More recently, the trend is very likely human-induced.

  8. Greenhouse Effect Greenhouse Gases: Water Vapor Carbon Dioxide Methane Nitrous Oxide These act as a thermal blanket around Earth—absorbing heat and warming the surface

  9. An Actual Greenhouse -The walls trap the heat from the sun in -Increased humidity -Warmer temperatures

  10. Causes of Global Climate Change Human Natural Solar variability Can be disproven Volcanic Eruptions Climatic Oscillations • Burning of fossil fuels • Carbon binds with Oxygen to make Carbon Dioxide • Clearing of land for agriculture • Industrial activities

  11. How Scientists Measure Global Climate Change

  12. Temperature • Air • Using a standard thermometer near surface • Using a weather balloon • Using aircraft • Ocean • Water surface temperature • Cyclic tool that descends into water and back to surface

  13. Precipitation • Rainfall • Rain gauge • Snow and hail • Hail pads • Fog • Visibility

  14. Biomass • Hard to measure but can show dramatic results. • Plants and animals often inhabit a small niche. Any minute changes in climate can effect either. • Insects • Animal tracking • Using controlled environments to simulate

  15. Sea Level • Tides • Atmospheric pressure can effect • Average Sea Level • Taken over a year • Sea Level • Relative—height of water relative to land • Satellite—distance between orbiting satellite to surface of water • Drifting Buoys—used in addition to other tools

  16. Solar Activity • The sun is not perfectly round • Causes uneven heating onto Earth’s surface • Direct • Measure the direct radiation from the Sun • Diffused • Atmosphere creates a scattered effect of radiation • Satellites

  17. Volcanic Gasses • Dust and soot can block out the sun • Destruction of stratosphere zone

  18. Location of Ozone Area directly above the Earth’s crust

  19. Chemicals • Ice Cores • Bubble trapped, measurement of Carbon Dioxide • Methane • Ozone • Water Vapor • Ocean Acidification

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