Global Climate Change and Ecosystem Impacts Sara Busken Mona shores High school.

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Presentation transcript:

Global Climate Change and Ecosystem Impacts Sara Busken Mona shores High school

Climate change is the departure from the expected average weather or climate. (temperature & precipitation) These changes generally occur over long periods of time, usually centuries or longer. Occasionally, these changes can occur more rapidly, in periods as short as decades. Such climate changes are often characterized as "abrupt." Source: NOAA Paleoclimatology

The “Greenhouse Effect”

Greenhouse Gas Warming

Keeling Curve

CO 2 per capita emissions 2000

Projected CO 2 per capita emissions 2025

Modern Global Warming

Carbon Dioxide and Global Temperature Correlations

100 mya 200 mya 300 mya 65 mya 1.6 mya Eocene Average Global Temperatures C Hot and cold periods spanning millions of years

Global Climate Change Great Lake States 1.General consensus predictions are for warmer conditions with moisture staying constant or increasing in the Lake States. 2.Extreme weather events are also predicted to increase in frequency.

Source: N. America Annual Temperature Scenario: 2050

N. America Annual Temperature Scenario: 2100 Source:

Increased Temperature and Precipitation Effects Why are the Great Lakes water levels dropping despite increased precipitation? How will this impact “Lake Effect” snowfalls?

Lands vulnerable to rise in sea level along the Atlantic and Gulf coasts

Climate Change & Terrestrial Effects

Michigan's Forest History

Growing season in Michigan sugar maple forests has lengthened 12 days since 1987.

Aboveground wood increment has increased in concert.

 In the short term, longer growing seasons may improve forest productivity  Will tree species acclimate to altered climate? (adjust their physiology so that their activity at a given temperature is lower)  Acclimation would improve NPP (growth) by reducing unnecessary respiration, which otherwise might offset the positive effect of a longer growing season  Leaf dark respiration does acclimate to warmer temperatures.  Root respiration generally appears to not acclimate.

What are WE doing to prevent Global Warming?

Can YOU Change the World?

Reduce Reuse Recycle You can make a difference