To a certain degree, the earth acts like a greenhouse. Energy from the Sun penetrates the glass of a greenhouse and warms the air and objects within the greenhouse. The same glass slows the heat from escaping, resulting in much higher temperatures within the greenhouse than outside it.
Likewise, the earth’s atmospheric gases affect the ability of the earth to radiate the Sun’s energy back into space. Nitrogen, Oxygen and Argon make up >99% of the earth’s atmospheric gases and are non-greenhouse gases. Water, Carbon Dioxide, and Methane make up <1% of the earth’s atmosphere, but are greenhouse gases, since they cause the earth to retain heat.
The temperature of the earth is directly related to the energy input from the Sun. Some of the Sun’s energy is reflected by clouds. Other is reflected by ice. The remainder is absorbed by the earth.
If amount of solar energy absorbed by the earth is equal to the amount radiated back into space, the earth remains at a constant temperature.
However, if the amount of solar energy is greater than the amount radiated, then the earth heats up.
If the amount of solar energy is less than the amount radiated, then the earth cools down.
Chemistary's presentation on global warming ;)
What is global warming?• Global warming is a natural phenomenon, and there is nothing realistic that mankind• can do to significantly change the global temperature. Before After
How Global Warming Works Carbon Dioxide (CO2) Fossil fuels (coal, oil, natural gas)
Example of the Greenhouse Effect The Sun’s energy passes through the car’s windshield.This energy (heat)is trapped insidethe car and cannotpass back throughthe windshield,causing the insideof the car to warmup.
Natural Atmosphere Enhanced Greenhouse has more Greenhouse greenhouse effect gases effect Heat radiates Heat radiates from the earth from the earthSome heat Less heatgoes out to goes outspace to space Atmosphere traps Atmosphere traps some heat more heatQuite a lot of heat More heat isis trapped and the trapped andearth is warm causes globalenough for life. warming
What’s the differencebetween “global warming” and “climate change”?
DifferenceGLOBAL WARMING CLIMATE CHANGE is the increase of the is a broader term that Earth’s average refers to long-term surface temperature changes in climate, due to a build-up of including average greenhouse gases in temperature and the atmosphere. precipitation.
Effects of Global Warming Rising Sea Level Increased Temperature Habitat Damage and Changes in Water Supply Species Affected
What’s the proof thatglobal warming is taking place?
Portage Glacier • Alaska 1914 2004Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
Burning of Fossil Fuels Pollution from coal, natural gas, and oil
How do humans increase carbon dioxide levels inthe atmosphere? Burning fossil fuels releases the carbon dioxide stored millions of years ago. Most of the increased carbon dioxide comes from fossil fuels Deforestation releases the carbon stored in trees. Less trees also means less carbon dioxide can be removed from the atmosphere.
How do humans increase methane levels in theatmosphere? Increased rice growing Methane is produced when bacteria rot organic matter Increased rubbish in Increased livestock farming landfill Methane is also released when The amount of methane in fossil fuels are the atmosphere has extracted increased by two and a half times since the Industrial Revolution.
Ice Core DataCO2 Measurements Before 1958 - Antarctica
CO2 Atmospheric MeasurementsCO2 Measurements Since 1958 – Mauna Loa, Hawaii
1000 Years of CO2 and Global Warming Temperature (Northern Hemisphere) CO2 ConcentrationsDegree Celsius Increase Parts Per Million 1000 1200 1400 1600 1800 2000 1000 1200 1400 1600 1800 2000 Year Year
Earth’s Temperature SolarSun Energy Solar Energy The temperature of the earth is directly related to the energy input from the Sun. Some of the Sun’s energy is reflected by clouds. Other is reflected by ice. The remainder is absorbed by the earth.
Earth’s TemperatureSunSolar Radiative CoolingEnergy If amount of solar energy absorbed by the earth is equal to the amount radiated back into space, the earth remains at a constant temperature.
Earth’s TemperatureSunSolar Radiative CoolingEnergy However, if the amount of solar energy is greater than the amount radiated, then the earth heats up.
Earth’s TemperatureSunSolar RadiativeEnergy Cooling If the amount of solar energy is less than the amount radiated, then the earth cools down.
What’s being done now to reduce our emissions?Wind Power Solar Power Fuel-Efficiency
We can stop global warming!Scientists agree that the burning of fossil fuels is causing global warming.Since these fuels are burned for energy, and everyone uses energy, everyone can help stop global warming just by using less energy or energy from renewable sources!
Simple Things To Do Turn off your computer or the TV when you’re not using it.Take shorter showers. Heating water uses energy. Keep rooms cool by closing the blinds, shades, or curtains.Turn off the lights when you leave a room. Use compact fluorescent bulbs.
Be Bulb Smart—Use CFLs What’s the Compact Incandescent difference? Fluorescent 500 lbs. of coal •1,430 lbs. CO2 pollution avoided •$30 saved
Simple Things To Do Dress lightly when it’s hot instead of turning up the air conditioning. Or use a fan.Dress warmly when it’s cold instead of turningup the heat. Offer to help your parents keep the air filters on your AC and furnace clean.Walk short distances instead of asking for aride in the car. Plant a tree. Recycle.
We humans are thought to be the main cause of global warming and climate change…….. but we still have the chance to do something about it.We can do it! Best ov luck!
• “Some parts of Jupiter are now as much as six degrees Celsius warmer than just a few years ago.” Imke de Pater and Philip Marcus of University of California, Berkeley
• Carbon dioxide "ice caps" near Marss south pole had been diminishing for three summers in a row. 2005 data from NASAs Mars Global Surveyor and Odyssey missions “A simultaneous rising in temperature on both Mars and Earth suggest that climate change is indeed a natural phenomenon as opposed to being man-made. Habibullo Abdussamatov, head of space research at St. Petersburgs Pulkovo Astronomical Observatory in Russia
• "At least since 1989, Triton, Neptune’s largest moon, has been undergoing a period of global warming," Astronomer James Elliot, professor of Earth, Atmospheric and Planetary Sciences at Massachusetts Institute of Technology
• Pluto is undergoing global warming. Over the past 14 years, the average surface temperature increased about 3.5 degrees Fahrenheit. Astronomer James Elliot
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