Bio 111 Global Warming Week9

8/2/2019 Bio 111 Global Warming Week9

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Global Climate Change


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when the carbon removed from the

atmosphere equals the carbon returnedto the atmosphere, the carbon cycle is inbalance

human activities have caused animbalance in the carbon cycle leading to

global warming


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Greenhouse gases prevent excess heat energyfrom escaping the earth's atmosphere

carbon dioxide largest contributor to global warming released by burning fossil fuels

methane

released by cattle digestion (this is a big one! beefraised for fast food), rice and other crops

lesser contributors:

nitrous oxide - released by auto emissions, agriculture,chemical manufacturing

ozone - released by auto emissions

water vapor - concentration increases as global

temperature rises


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Review of the carbon cycle - burning fossil fuelsreleases CO2 from food energy stored in petroleum,

coal, natural gas


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Global warming prevents excess heat fromescaping the atmosphere


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Studies show a steady increase in CO2 inthe atmosphere


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atmospheric CO2 levelsare currently at the

highest level in 650,000years

CO2 data determined by

comparing present dayatmosphere withatmospheric gasestrapped in polar icedeposited in ancienttimes


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Predicted climate changes resultingfrom global warming

rising global temperatures

changes in global weather patterns

rising sea level

spread of tropical diseases


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Rising global temperature


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Rising temperaturesmelt sea ice and

glaciers

beautiful photo of an iceberg- don't you think? melting glacier. all this

rock was covered with

thick ice not long ago!


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tzi the Iceman - a well-preserved natural mummy of aman from about 3300 BC (53 centuries ago), released

from a melted glacier in 1991 between Austria and Italy.


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Rising sea level

threatened by global warming, the country seeks to

buy a new homeland for it's peoplehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-

change

FYI: New York City is only a couple of feet above sea level and

New Orleans, of course, is below sea level

Maldive Islands - nation

in the Indian Ocean,south of India

slightly less than 400,000people

lowest sea level of anycountry in the world
http://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-changehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-changehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-changehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-changehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-changehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-changehttp://www.guardian.co.uk/environment/2008/nov/10/maldives-climate-change


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Changes in global weather patterns

more frequent and moreserious storms

changes in global rainfallpatterns (some areasmore drought, othersflooding)

changing temperature

and rainfall patterns canhave a serious effect onagriculture and worldfood supplies


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Changes in ocean temperature (due to globalwarming) can disrupt normal ocean circulation normally, strong trade

winds blow westward,moving the surface layerof the ocean westward

flow of surface waterwestward brings coldwater to the oceansurface - nutrient rich

upwelling makes nutrients available

to marine life in theeastern Pacific

the enriched water isthe basis for a thrivingfishing industry off thecoast of Peru

the warm water readilydiffuses into theatmosphere, bringingabundant rainfall to

Indonesia and Australia(supports significantagricultural production)


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El Nio Effect

trade winds are much

weaker lessens or stops the

upwelling of nutrientrich water and reduces

the flow of warm waterto the west

without the westward

trade winds, thesurface water of theocean flows from westto east

movement of surface

water east preventsnutrient upwelling

rainfall follows thewarm water eastward,causing flooding inPeru and drought inIndonesia and Australia

organisms lacknutrients and many die

fishing industrycollapses


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IPCC reports more than 90% of globalclimate change is caused by humans

h d l


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Transportation is the second largestsource of U.S. greenhouse gases


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Electrical generation is another large source

satellite image of Northand Central America at

night


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Heat energy escapes from nations Capitol


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Collective action can significantlyreduce our carbon footprint

save your hard-earned money

be more comfortable in your home

reduce carbon emissions help the U.S. economy

what's not to like about that? so, how canthis be accomplished? here are just a fewsuggestions


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vote with yourpocketbook

choose energyefficientappliances

when youmake apurchase


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Insulate and replace windows

double panewindows loseless heat


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compact fluorescentbulbs last up to 10years and use much

less energy thannormal incandescentbulbs

big savings on your

power bill imagine how this

could help businessesstruggling to balancetheir budgets andavoid layoffs


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If every American home replaced just one lightbulb with an Energy Star qualified bulb, we

would save enough energy to: light more than 3 million homes for a year

save more than $600 million in annualenergy costs

prevent greenhouse gases equivalent to theemissions of more than 800,000 cars

http://www.energystar.gov/index.cfm?c=cfls.pr_cfls

H ' l t th S Si


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Here's an example at the San Simeonestate in California


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lighting for themansionthe property isnow managedby a historical

trust


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a few other ideas:

is your water heater insulated? you can buy aninsulating blanket to wrap around at a hardwarestore

how about getting a programmable thermostat?research shows that controlling the temperature

automatically can save 10%-15% on yourheating bill without sacrificing comfort

in most homes, nearly 50% of the total utility billgoes toward heating and cooling

edge your doors and windows with insulatingtape - prevent drafts and save energy bothsummer and winter (air conditioning uses

energy too)


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I have lots more ideas for energy options - you'llhear more about this as we continue through the

semesterbut just one idea to save energy you might nothave thought of:

low flow shower heads come in dozens of fancymodels now - even with multiple massage features

this will not only save energy by using less hotwater, but will make sure there's enough hot

water for everyone to enjoy their showerssee the next slide for just a couple of examples Igot from a magazine


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Water saving shower heads

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Bio 111 Global Warming Week9