Exploring the Atmosphere with Extreme Balloons

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Presentation transcript:

Exploring the Atmosphere with Extreme Balloons Columbia Space Initiative

What is the Columbia Space Initiative?

Workshop Overview The Ozone Layer Weather Balloons The Experiment Q&A

The Ozone Layer

What is the ozone layer? A layer of ozone (O3) in the Stratosphere 20 to 30 kilometers (12 to 19 miles) above the Earth Not very thick - 10ppm (parts per million) compared to 0.3ppm near the surface

Why is the ozone important to the Earth? It’s a very thin layer of gas very high up - why is it important? It’s important because it absorbs harmful radiation from the sun. The Ozone layer blocks 98% of UVB, or Ultraviolet-B, radiation from the sun. The Ozone layer also blocks 100% of UVC radiation. UVB is harmful to life on Earth. UVB is linked to skin cancer and cataracts in humans UVB leads to damage to oceanic life. UVB also impairs photosynthesis in plants.

The ozone layer is extremely important to life on Earth.

What happened to the ozone layer? Beginning in the 1970s, the ozone layer began to be significantly affected by CFCs. CFCs, or Chlorofluorocarbons, were used in aerosol cans. Chlorine reacts with ozone and destroys it. By the late 1980s, the ozone layer above the arctic was destroyed by up to 65 percent. The Montreal Protocol was signed in 1989 to limit the use of CFCs. It will still take ~50 years for the ozone layer to recover.

The world we avoided

Weather Balloons

What is a weather balloon? A weather balloon is a large balloon made to reach high altitudes. It is often filled with helium or hydrogen. It can reach 120,000 ft (23 miles, 37 km) or even higher. The balloon expands to be very large as it rises. It has a lot of applications: Weather research: NOAA Hobbyist: Cameras Special: Red bull

Weather balloons

Weather balloons

Captured

Gator in space

3:30

The Experiment (The Scientific Method)

What are we looking for? What do we want to know? How does the amount of UVB radiation change as we go higher in altitude? The Question What are we looking for? What do we want to know?

The Hypothesis What do we think will happen? What is our educated guess? IF-THEN statement

Design and plan the experiment Materials Logistics Independent variable Dependent variable Procedure Data The Experiment Design and plan the experiment

Interpret the data What does the data mean? Analysis Interpret the data What does the data mean?

UVB plot

What did we learn? Do we accept or reject the hypothesis? Conclusion What did we learn? Do we accept or reject the hypothesis?

Q&A

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