the impacts of greenhouse gases on global warming
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The Impacts of Greenhouse Gases on Global Warming
Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century.
Since the early 18th century, Earth's mean surface temperature has increased by about 1.4 °C
Global Warming
http://www.youtube.com/watch?v=pG41xDxrzI8&feature=related
What Causes Global Warming
Global Warmin
g
Greenhouse gases
Particulates and soot
Solar activity
Gases that trap heat in the atmosphere are called greenhouse gases. Water vapor (H2O) Carbon dioxide (CO2) Methane (CH4) Nitrous oxide (N2O) Ozone (O3) Fluorinated gases (CFCs)
What is greenhouse gases
U.S. Greenhouse Gas Emissions in 2010
The Greenhouse Effect is the effect of greenhouse gases in the Earth’s atmosphere trapping heat that is released from the Earth.
Greenhouse Effect
Most greenhouse gases have both natural and human-caused sources
Carbon dioxide Burning fossil fuels (coal, natural gas and oil) Solid waste, trees and wood products, and also
as a result of certain chemical reactions
Greenhouse Gases Sources
Nitrous oxide Agricultural and industrial activities Combustion of fossil fuels and solid waste.
Methane Production and transport of coal, natural gas,
and oil. Livestock and other agricultural practices.
Greenhouse Gases Sources
Impacts
Physical impacts
Social systemsBiological systems
Extreme weather Heat waves Tornadoes Thunderstorms Cold waves
Physical impacts
Glacier retreat and disappearance
Future changes in glaciers: Mountainous areas in Europe
will face glacier retreat In Polar regions, there will be
reductions in glacier extent and the thickness of glaciers.
Physical impacts
Ocean acidification The ongoing decrease in the
pH of the Earth 's oceans , caused by the uptake of carbon dioxide from the atmosphere .
This ongoing acidification of the oceans poses a threat to the food chains connected with the oceans.
Physical impacts
Food supply Increasing the frequency of extreme events,
and modified weed, pest, and pathogen pressure.
Low-latitude areas are at most risk of having decreased crop yields.
Health Change the range of some infectious disease
vectors. e.g Mosquito can infect malaria.
Social systems
Extreme weather Global warming had strongly
affected natural biological systems, such as plants and animals
In the Northern Hemisphere, species are almost uniformly moving their ranges northward and up in elevation in search of cooler temperatures.
Biological systems
Government Reduce emissions of greenhouse gases Improve the energy efficiency and vehicle fuel
economy. Increases the renewable sources, such as wind,
solar power, hydrogen sources, biofuels resource
Set up laws to reduce emissions from factories
What We Can Do?
What We Can Do?
Low-carbon life means lifestyle to minimize the energy consumed, thereby reducing carbon dioxide emissions. less meat more bicycles less light
Low-carbon Life
Climate changes. (2007). BBC Weather Centre. Accessed at http://www.bbc.co.uk/climate/evidence/carbon_dioxide.shtml
Etheridge, D. M., Steele, L. P., Langenfelds, R. L., Francey, R. J.,Barnola, J.-M., & Morgan, V. I. (1996). Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Antarctic ice and firn. Journal of Geophysical Research, 101, 4115–4128. doi:10.1029/ 95JD03410.
Keeling, C. D. (2007). Atmospheric CO2 calculations derived from in situ air samples collected at Mauna Loa observatory, Hawaii. Accessed at http://cdiac.ornl.gov/ftp/trends/co2/maunaloa.co2
Bogan, R., Ohde, S., Arakaki, T., Mori, I., & McLeod, C. (2009). Changes in Rainwater pH associated with Increasing Atmospheric Carbon Dioxide after the Industrial Revolution. Water, Air & Soil Pollution, 196(1-4), 263-271. doi:10.1007/s11270-008-9774-0
Sea level: Climate Change. (2010): US EPA. Publisher: US EPA. Accessed at: www.epa.gov/climatechange/science/indicators
Lobell DB, Burke MB, Tebaldi C, Mastrandrea MD, Falcon WP, Naylor RL (2008). "Prioritizing climate change adaptation needs for food security in 2030". Science 319 (5863): 607–10. doi:10.1126/science.1152339. PMID 18239122.
Reference
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