Rock it like a hurricane!

• Please get out your Ike Dike analysis from the end of last class for a stamp.

• If you have your permission slip and money, put them on your desk.

• Please read the board!

• Use your handout from last class to complete these answers.•WHAT is the Ike Dike proposal?•WHY do many people feel it is needed?•WHY do other people not want to build it?•WHAT do YOU think about this plan?

• Early finishers hand back non-test papers.

Let’s back this up a bit . . . . .

WHY WOULD A WARMER WORLD CREATE MORE FREQUENT AND MORE INTENSE HURRICANES?

Brainstorm game!• In the next 60 seconds, write down everything you can think of when I say . . . .

Look at Objectives #8-13. What do you remember about these?

Major Greenhouse gases•Carbon dioxide CO2

Methane CH4

Water!

The more greenhouse gases, the warmer it gets.

Compare them!• Current CO2 concentration

396ppm

International goal?

We are changing the Carbon Cycle: moving ancient carbon from underground to the atmosphere.

WHY WOULD A WARMER WORLD CREATE MORE FREQUENT AND MORE INTENSE HURRICANES?

Hurricanes require:• 1. Warm waters• 2. Evaporated water from ocean• 3. Wind patterns that start to spiral inwards

• A hurricane is a huge storm! It can be up to 600 miles across and have strong winds spiraling inward and upward at speeds of 75 to 200 mph. Each hurricane usually lasts for over a week, moving 10-20 miles per hour over the open ocean. Hurricanes gather heat and energy through contact with warm ocean waters. Evaporation from the seawater increases their power. Hurricanes rotate in a counter-clockwise direction around an "eye" in the Northern Hemisphere and clockwise direction in the Southern Hemisphere. The center of the storm or "eye" is the calmest part. It has only light winds and fair weather. When they come onto land, the heavy rain, strong winds and large waves can damage trees, cars and buildings.

Hurricanes in the northern half of the Atlantic Ocean have become stronger over the last few decades. This graph shows the Power Dissipation Index, which measures total hurricane power each year based on the number of hurricanes and their wind speed. The graph also shows how hurricane strength is related to water temperature. Source: EPA's Climate Change Indicators (2012).

Why is 1oF warmer a big deal?• Daily grades vs. your GPA• Global Average temperature today 58oF • 365 days/yr x two readings/day x 3,000 weather stations = a very ROBUST average.

But my little bit of carbon doesn’t make a difference, does it?

Let’s go fishing . . Er, shrimping!

•The objective of the activity is to harvest as many shrimp as possible from the sea.•At carrying capacity, there are 16 shrimp in this ocean. For every four shrimp harvested, you get one point.•There will be four, 20-second seasons of fishing.• If shrimp remain in the sea after each trial, a new shrimp will be added for each one remaining.

The Tragedy of the Commons

•The ruin of free-access resources by individuals’ collective actions.•How does this apply to Climate change?

How much warmer will it get?• IPCC – Intergovernmental Panel on Climate Change• 1,200 scientists from around the world.• Compile evidence in one place and publish findings• Jan 2007 – issued report on climate change. • Absolute agreement on anthropogenic cause of current climate change.• “Warming of the climate system is unequivocal”• “There is very high confidence that the net effect of human activities since 1750 has been one of warming.”

Analyze the graphs•1. What is the difference between figures A and C?•2. What do the diagonal lines on Figure A mean?•3. How many years does the map on Figure A cover?•4. What does the zero represent on the Y axis of figure B?•5. What is the difference between the black line and the purple/orange lines on Figure B?•6. How much warmer might the planet get by 2100?•7. How is figure C related to Figure B? Why are there TWO maps?

Check for understanding• How does the greenhouse effect work?•What three gasses increase the greenhouse effect?•Why is a 1oF increase in global temperature a big deal?•Why should we expect more hurricane activity as climate change continues?•Why is climate change an example of the Tragedy of the Commons?• How would the Ike Dike protect us in a warmer world?

Homework:• Objectives #1-5 and 8-11 • Quiz tomorrow on these objectives