1 / 22

GLOBAL CIRCULATION

GLOBAL CIRCULATION. most winds are driven by pressure differences in the atmosphere. pressure differences can be created by: . More heating occurs at the equator due to higher sun angles. Jet stream. an upper level wind belt located at the.

Audrey
Download Presentation

GLOBAL CIRCULATION

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 CIRCULATION • most winds are driven by pressure differences • in the atmosphere • pressure differences can be created by:

  2. More heating occurs at the equator due to higher sun angles

  3. Jet stream • an upper level • wind belt located • at the

  4. (red arrows) and semi- • permanent high and low pressure cells

  5. (red arrows) and semi- • permanent high and low pressure cells

  6. cause the oceans to circulate in a • series of

  7. a temporary shift in the climate of the planet • results due to the

  8. conditions in the South Pacific:

  9. conditions in the South Pacific

  10. Feedback--: Feedback “loops” are important in short term weather events and for long-term climate change ---the response of a system to a stimulus moderates or decreases the initial change e.g. the atmosphere warms evaporation increases  more clouds form  more reflection of solar  radiation occurs  the atmosphere cools

  11. ---response of a system to a stimulus amplifies the initial change (“vicious cycle” or “snowball effect”) e.g.: the atmosphere warms the oceans warm  warm water absorbs less CO2  CO2 increases in the atmospherethe atmosphere warms more

  12. http://www.tntech.edu/earth/wx_station.htm

  13. How do we study paleoclimate?

  14. Ice cores—

  15. 2) Marine sediments—dead stuff (e.g., plankton, diatoms)

  16. 3) Dendroclimatology—

  17. 4) Non-marine biologic evidence—e.g.:

  18. 5) Non-marine geologic evidence—e.g.:

  19. Why paleoclimatology? • to understand the controls that shape • our present climate • to explain many present day geologic and • biologic patterns on the Earth • to (hopefully) predict future climate change

More Related