GLOBAL WARMING by k966Xd

VIEWS: 1 PAGES: 38

									                   GLOBAL
                   WARMING
CE/AE/EnSci 524B




   QUANTIFYING GLOBAL
     CLIMATE CHANGE
Are humans the culprit?




         ?
         =
Temperatures over the last 1000 years
Temperature change in North America
Water precipitation in North America
Heat balance factors in the atmosphere




Source: National Resources Defense Council
The Greenhouse Effect
Heat balance over Earth
                  Blackbody radiation
Both the Sun and Earth emit radiation as a function of temperature,
according to the Stefan-Boltzmann Law (derived from Plack’s Law): E = σAT4
 The electromagnetic spectrum
Progressively more heat is released at higher temperatures
and wavelengths become shorter with higher temperatures
Maximum intensity at a temperature
            Earth and solar radiation
Calculate the power emitted by Earth and peak wavelength for Sun and Earth
Solar Spectrum
The real solar spectrum
Screening by the atmosphere
Vibration energy imparted to CO2
molecules – released as infrared



    http://www.ucar.edu/learn/images/carbon.gif
Global trends in major greenhouse gases
The most important greenhouse gas - water
Climate change impacts
SOURCES OF GREENHOUSE GASES
Sources of greenhouse gases
Methane Quantities Released by Different Sources in Tg
Source         1990           1997           1998           1999           2000           2001           2002           2003
Category
Landfills             172.2          147.4          138.5          134.0          130.7          126.2          126.8          131.2
Natural Gas
                      128.3          133.6          131.8          127.4          132.1          131.8          130.6          125.9
Systems
Enteric
                      117.9          118.3          116.7          116.8          115.6          114.5          114.6          115.0
Fermentation
Coal Mining            81.9           62.6           62.8           58.9           56.2           55.6           52.4           53.8
Manure
                       31.2           36.4           38.8           38.8           38.1           38.9           39.3           39.1
Management
Wastewater
                       24.8           31.7           32.6           33.6           34.3           34.7           35.8           36.8
Treatment
Petroleum
                       20.0           18.8           18.5           17.8           17.6           17.4           17.1           17.1
Systems
Rice
                        7.1            7.5            7.9            8.3            7.5            7.6            6.8            6.9
Cultivation
Stationary
                        7.8            7.4            6.9            7.1            7.3            6.7            6.4            6.7
Sources
Abandoned
                        6.1            8.1            7.2            7.3            7.7            6.9            6.4            6.4
Coal Mines
Mobile
                        4.8            4.0            3.9            3.6            3.4            3.1            2.9            2.7
Sources
Petrochemica
                        1.2            1.6            1.7            1.7            1.7            1.4            1.5            1.5
l Production
Iron and
                        1.3            1.3            1.2            1.2            1.2            1.1            1.0            1.0
Steel
Agricultural
Residue                 0.7            0.8            0.8            0.8            0.8            0.8            0.7            0.8
Burning
Total for
                      605.3          579.5          569.3          557.3          554.2          546.7          542.3          544.9
U.S.
Anthropogenic Methane Sources
Anthropogenic Methane Sources
Greenhouse
Gas Emissions
By Gas (1997)
US Greenhouse Gas Emissions /capita & /$ GDP
Sources of Gas (1997)
US ENERGY
CONSUMPTION
BY ENERGY
SOURCE
US ENERGY CONSUMPTION (Quadrillion BTU)
CO2 EMISSIONS From FOSSIL FUEL COMBUSTION
END USE SECTOR EMISSIONS OF CO2 FROM FOSSIL FUEL
SOURCES OF CH4

           (farts and belches)
SOURCES OF N2O
SOURCES OF HFCs, PCFs and SF6
                  Quiz
• http://yosemite.epa.gov/oar/globalwarming
  .nsf/content/impacts.html

								
To top