1 / 20

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

kiele
Télécharger la présentation

GLOBAL CLIMATE CHANGE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related