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Mr. Good Environmental Science

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Presentation on theme: "Mr. Good Environmental Science"— Presentation transcript:

1 Mr. Good Environmental Science
Earth’s Climate Mr. Good Environmental Science

2 What is Climate? Broad average of the average conditions in a region Determined by- Amount or Rain/Snow Fall Snow and Ice Cover Wind Direction and Strength Many other things..

3 Weather vs. Climate Weather- Less than 1 year… Short, variable local changes Climate- Greater than 1 year… Long term regional changes

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5 Lots of Factors Effect Climate
2 Main Categories- External Factors- Internal Interactions- External Factors + Internal Interactions = Climate Variations

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7 External Factors Changes in Plate Tectonics Earth’s internal heat affects its surface Changes in Earth’s Orbit- Amount of solar radiation (sunlight / other energy) Changes in Sun Strength Variations in the amount of radiation the sun puts off

8 Internal Interactions
Component Response Time Fast Responses Atmosphere Hours/Weeks Land Surface Hours/Months Ocean Surface Hours/Decades Sea Ice Weeks/Years Slow Mountain Glaciers YRS Deep Ocean YRS Ice Sheets ,000 YRS

9 Change / Response Forcing- Something creates a change Response- Actual change that happens Heating a flask of water with a Bunsen burner Forcing- Bunsen Burner Response- Temperature of Water

10 Response Time- The amount of time it takes a forcing to produce a response Equilibrium- Point at which a climate is no longer in change

11 Feedbacks Positive Feedback- Increases a response to a change Negative Feedback- Decreases a response to a change

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13 How do we know about past climate?
Ocean Sediments- Runoff from the ground eventually makes it to the ocean From there it accumulate in layers Changes in sea level change where the sediment is deposited

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15 How do we know cont… Trees- Tree rings > 10,000 Years Glacial/Continental Ice- Annual Snowfall creates layers in Ice Ice Cores > 700,000 Years Coral- Annual coral growth can be measured and dated

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18 How do we now cont… cont…
Historic Archives- ~Thousands of Years Instrumental Archives- ~200 Years

19 How do we know cont… cont… cont…
Types of land fossils in record- Plants / Pollen / Animals Types of fossils in ocean sediment- Plankton- Different types of plankton like to live in different temperature water

20 Models Scientist use computer models to simulate different conditions of the past Compare to conditions today

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