Ozone Depletion

Global Warming Continued:

Simplest Prediction is increase in global mean temperature.

Role of clouds is crucial Net Cooling or Warming? There is general consensus that cloud cover will increase as the capacity for the atmosphere to retain water increases with increasing temperature.

What does the actual data look like?

  • All the Data: Global Warming NCDC Document

    Long Term Temperature Trends:

    Potential Problems:

    Distribution of Temperature trends on the Earth. Where is it getting warmest the fastest:

  • All the historical data
  • 1953-1973
  • 1973-1993

    When positional data is combined with temperature data and time-sliced in this way - it seems clear the Global Warming is occurring. This conclusion was reached by a National Academy of Science panel in Sept. 1995 and is accepted by most.

  • Temperature Variations with Altitude

    What about the US:

  • Annual US Trends
  • Max Temperature US Trends
  • Min Temperature US Trends
  • Annual Precipitation Trends
  • Number of Tornadoes

  • Some Conclusions

    Some Internet Resources:

  • Nice Overview
  • Comprehensive overview
  • Another overview
  • A Dissenting View (not really - this talks about how we are warming the oceans - same problem!)
  • Journalistic view of the problem
    Now on to Ozone Depletion Problem:

    Ozone Depletion
    Oct 30, 1996 Hole size

    Oct 23, 1998 Hole Size

    Recent years Data 1998 was largest hole measured due to colder than average temperatures which accelerate the depletion process.

    But CFC concentrations are now finally measured to be going down.

    Long Term Evolution:

    Latest Results (9/1/96 - 10/14/96)
    Latest Results (9/1/97 - 10/14/97)

    Overview:

    1995 Hole data:

    Why do we see the hole in the Antarctic Spring?

    Expectations for this Spring (i.e. right now)

    Where are we Now?

    Internet Resources Relevant to the Ozone Problem:

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