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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-change8/2/2019 Bio 111 Global Warming Week9
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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
Recommended