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Topic: Greenhouse warming

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	Greenhouse Effect -- Resources at Erratic Impact's Philosophy Research Base
		The greenhouse effect results from "the dirty of the atmospheric infrared window" by some atmospheric trace gases, permitting incoming solar radiation to reach the surface of the Earth unhindered but restricting the outward flow of infrared radiation.
		The greenhouse effect is an increase in the average temperature of the Earth.
		Greenhouse gases-carbon dioxide, methane, nitrous oxide, and others-are transparent to certain wavelengths of the Sun's radiant energy, allowing them to penetrate deep into the atmosphere or all the way to Earth's surface.
	www.erraticimpact.com /~ecologic/html/air_greenhouse_effect.htm (1143 words)

	NATEXAMINER: Global Warming
		In this theory, the increased volumes of carbon dioxide and other greenhouse gases released mainly by the burning of fossil fuels, and, to a lesser extent, land clearing and agriculture, are the primary sources of warming.
		Climate commitment studies predict that, even if levels of greenhouse gases and solar activity were to remain constant, the global climate is committed to 0.5C of warming some model results are as high as 1.0C over the next one hundred years due to the lag in warming caused by the oceans.
		Greenhouse gases (GHG) are gaseous components of the atmosphere that contribute to the greenhouse effect.
	www.natexaminer.com /warming.html (4508 words)

	Greenhouse effect - Wikipedia, the free encyclopedia
		The greenhouse effect, first discovered by Joseph Fourier in 1824, and first investigated quantitatively by Svante Arrhenius in 1896, is the process in which the absorption of infrared radiation by an atmosphere warms a planet.
		The key to the greenhouse effect is the fact that the atmosphere is relatively transparent to visible solar radiation but strongly absorbing at the wavelengths of the thermal infrared radiation emitted by the surface and the atmosphere.
		When the concentration of a greenhouse gas (A) is itself a function of temperature, there is a positive feedback from the increase in another greenhouse gas (B), whereby increase in B increases the temperature which, in turn, increases the concentration of A, which increases temperatures further, and so on.
	en.wikipedia.org /wiki/Greenhouse_effect (2575 words)

	JunkScience.com -- The Real Inconvenient Truth: Greenhouse, global warming and some facts
		Given the number of JunkScience.com readers expressing some confusion over the "greenhouse effect," carbon dioxide, global warming and climate change, we thought it might be a good idea to pull together a page of questions-and-answers, complete with a few nice little graphics explaining the facts.
		The term "greenhouse effect" is unfortunate since it often results in a totally false impression of the activity of so-called "greenhouse gases." An actual greenhouse works as a physical barrier to convection (the transfer of heat by currents in a fluid) while the atmosphere facilitates convection.
		Greenhouse gases do not emit energy in the same bandwidth that they absorb energy, and thus emissions from carbon dioxide are not absorbed by carbon dioxide.
	www.junkscience.com /Greenhouse (6426 words)

	NOAA Paleoclimatology Global Warming - The Story
		This warming is one of many kinds of climate change that the Earth has gone through in the past and will continue to go through in the future.
		The term greenhouse effect describes how water vapor, carbon dioxide, and other "greenhouse" gases in the atmosphere alter the return of energy to space, and in turn, change the temperature at the Earth's surface.
		It is important to remember both that the greenhouse effect occurs naturally, and that it has been intensified by humankind's input of greenhouse gases into the atmosphere.
	www.ncdc.noaa.gov /paleo/globalwarming/what.html (694 words)

	solcomhouse-Global Warming
		The greenhouse effect is a necessary phenomenon that keeps all Earth's heat from escaping to the outer atmosphere.
		Global warming is at the root of the increase, say the researchers, as the Earth’s climbing temperatures melt the Arctic sea ice and Antarctica.
		"Greenhouse gases are accumulating in the Earth's atmosphere as a result of human activities, causing global mean surface air temperatures and subsurface ocean temperatures to rise," the EPA states in the report.
	www.solcomhouse.com /globalwarming.htm (1672 words)

	What you never hear about greenhouse warming (Site not responding. Last check: 2007-11-02)
		Climate models predict that greenhouse warming should increase with latitude and be greatest in polar latitudes in winter.
		The least controversial explanation for the warming shown by our surface temperature observations is that it represents a return to normal from the Little Ice Age and possibly, entry into the next warm period of the Holocene.
		Models of global warming are especially oversimplified for the tropics due to their inability to cope with the very low humidities in the downwelling portions of the Hadley circulation.
	www.sovereignty.net /p/clim/warming97.htm (1076 words)

	Greenhouse Warming: Fact, Hypothesis, or Myth? (Site not responding. Last check: 2007-11-02)
		Hence, the magnitude of the modern warming might be overestimated in the context of earlier recon-structed variability." The various forcing factors might interact in a non-linear fashion which could lead to greater uncertainties in reconstructing climate variations, particularly on the longest time scales, than is commonly assumed.
		The warming will be greatest at night when the contrast between surface temperatures and sky temperatures is greatest and will tend to be greater in northern regions then in tropical regions.
		Neither greenhouse gases nor changing cloud cover can account for the decreasing diurnal temperature cycle in the surface observations, which is the primary evidence that is used to claim the warming is caused by increased greenhouse gases.
	mitosyfraudes.8k.com /INGLES/WarmingHypothesis.html (4244 words)

	Greenhouse Gases
		Greenhouse gases naturally blanket the Earth and keep it about 33 degrees Celsius warmer than it would be without these gases in the atmosphere.
		The "greenhouse effect" is the heating of the Earth due to the presence of greenhouse gases.
		This evidence supports the common belief that Global Warming is occurring due to the increased concentration of greenhouse gases in the atmosphere, carbon dioxide, nitrous oxide, methane, and HFC’s.
	www.umich.edu /~gs265/society/greenhouse.htm (3957 words)

	Global Warming: Greenhouse Effect (Reference) - TeacherVision.com
		The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun.
		Greenhouses are used to grow plants, especially in the winter.
		This causes the greenhouse to heat up, much like the inside of a car parked in sunlight, and keeps the plants warm enough to live in the winter.
	www.teachervision.fen.com /global-warming/resources/44468.html (296 words)

	Present: Earth is Warming - Climate Change and Global Warming
		Without the so-called greenhouse gases, including carbon dioxide, methane, nitrous oxide, and water vapor, Earth would be too cold to inhabit.
		This warming of the average temperature around the globe has been especially sharp since the 1970s.
		For example, recent research at NCAR re-examines the role of decades-long cycles of solar variation in explaining the observed warming in the first half of the 20th century.
	www.ucar.edu /research/climate/warming.shtml (734 words)

	Global Warming: A closer look at the numbers (Site not responding. Last check: 2007-11-02)
		While the greenhouse reductions would exact a high human price, in terms of sacrifices to our standard of living, they would yield statistically negligible results in terms of measurable impacts to climate change.
		Some, like Wallace Broecker, a geochemist at Columbia's Lamont-Doherty Earth Observatory, suggest that it is such an important factor that much of the global warming in the last 10,000 years may be due to the increasing water vapor concentrations in Earth's atmosphere.
		However, secondary greenhouse effects stemming from changes in the ability of a warming atmosphere to support greater concentrations of gases like water vapor and carbon dioxide also appear to play a significant role.
	www.clearlight.com /~mhieb/WVFossils/greenhouse_data.html (1931 words)

	Global Warming/Greenhouse Effect
		Global warming due to C02 buildup is attributed to the reduction of infrared radiation lost to outer space, whereas a greenhouse conserves beat by lirniting the amount of energy that is lost through convection.
		In the case of a greenhouse effect, the visible light comes in just as it would if there were no atmosphere, but the atmosphere gases, transparent in the visible part of the spectrum, tend to be opaque in the infrared part of the spectrum.
		The greenhouse effect operating on the Earth's atmosphere is mainly the result of carbon dioxide and water vapor.
	www.munfw.org /archive/40th/unep4.htm (2718 words)

	Greenhouse Effect
		The greenhouse effect, despite all the controversy that surrounds the term, is actually one of the most well-established theories in atmospheric science.
		Therefore, increasing the amount of greenhouse gases increases the planet's surface temperature by increasing the amount of heat that is trapped in the lowest part of the atmosphere.
		We cannot directly verify our quantitative predictions of greenhouse warming on the basis of purely historical events (31); therefore, we must base our estimates on natural analogs of large climatic changes and numerical climatic models because the complexity of the real world cannot be reproduced in laboratory models.
	www.ciesin.org /docs/003-074/003-074.html (9622 words)

	Climate Forcing: Greenhouse Gases & Aerosols - NOAA ESRL CSD
		These "greenhouse gases," as they are called, have always had a critical role in determining the temperature of the Earth's surface and the livability of the planet.
		Now, with the amounts of CO and other greenhouse gases increasing in the atmosphere due to human activities, the possible implications for climate are the subject of much research.
		The findings were used by the international scientific community to assess Global Warming Potentials and Ozone Depletion Potentials in the recent United Nations Environment Programme-sponsored evaluation of the "state of the science" on ozone depletion (Scientific Assessment of Ozone Depletion: 1994; see the section on stratospheric ozone).
	www.al.noaa.gov /Greenhouse.html (615 words)

	Global Warming
		The enhanced greenhouse effect refers to the augmentation of these natural gases by human activities.
		Loss of stratospheric ozone is causing the stratosphere to cool with time, which, of course, greatly confuses the issue of global warming.
		In principle, CFCS are very bad and will dominate the greenhouse gases in our atmosphere if their terrestrial usage remains high.
	zebu.uoregon.edu /1998/es202/l13.html (675 words)

	Scientist says greenhouse warming is here Science News - Find Articles (Site not responding. Last check: 2007-11-02)
		While scientists say the greenhouse effect may not have specifically caused this year's drought, they testified that droughts in the North American interior are probably becoming more frequent because of global greenhouse warming.
		Other scientists are not as confident as Hansen in heralding the greenhouse warming.
		"We cannot at this time categorically say that this [warming] is due to the greenhouse gases," says climatologist Syukoro Manabe of the National Oceanic and Atmospheric Administration in Princeton, N.J. Manabe, who also testified at the Senate hearing, says the rising temperatures in the last 100 years match predictions for the greenhouse warming.
	www.findarticles.com /p/articles/mi_m1200/is_n1_v134/ai_6831923 (519 words)

	NOAA Paleoclimatology Program - Perspective on Global Warming - The End
		We also attempt to clear up some of the confusion surrounding the issues of global warming, greenhouse warming, the ozone hole, and related change in the Earth's climate system.
		First on the list of likely human influences is warming due to increasing concentrations of greenhouse gases in the atmosphere.
		There is little doubt that these gases will contribute to global warming, and here too the paleo record provides invaluable evidence regarding how much temperature change accompanied changes in carbon dioxide over the past several hundred thousand years.
	www.ncdc.noaa.gov /paleo/globalwarming/end.html (667 words)

	Global Warming/Climate Change Theme
		Also addressed are strategies for dealing with potential global warming and the major contributors to global warming.
		In "It is happening" students can get the historical perspective on global warming as well as information on what the issue is. There are also articles describing impacts, discussions of solutions, and games/puzzles for students.
		The observed evidence indicates that little or no global warming is happening and little should be expected.
	www.cln.org /themes/global_warming.html (1169 words)

	Still Waiting For Greenhouse
		Recently, the world's media was abuzz with reports from Tasmania that a 160-year-old tidal mark had been found in south-eastern Tasmania, and that scientists had concluded that it showed evidence of `dramatic' sea level rise during the 20th century.
		The pre-1940 warming is widely regarded to have been caused by the warming sun during the earlier part of the 20th century.
		This is the combined record from hundreds of weather stations in the 48 states of the contiguous USA., the early 1930s being the hottest years of the 20th century.
	www.john-daly.com (4594 words)

	NOW. For Educators. Global Warming \| PBS
		(See NOW's History of Global Warming at http://www.pbs.org/now/science/climatechange.html) Today, most scientists agree that earth's temperature has risen over the past century and that carbon dioxide is one of the primary greenhouse gases that contribute to global warming.
		Students should be familiar with the terms, "global warming," the "greenhouse effect," and "greenhouse gases." Also, that the U.S. is a leading producer of greenhouse gas emissions that contribute to global warming.
		The goal of the project is for students to create something substantive that they can use to share their positions on global warming and to increase awareness about its related issues.
	www.pbs.org /now/classroom/globalwarming.html (1875 words)

	NASA lends weight to warming signs - Environment - MSNBC.com
		A change in policy appears to be occurring after NASA scientist Jim Hansen complained about being silenced because of the Bush administration’s opposition to mandatory curbs on greenhouse gases that many scientists tie to global warming.
		In the most recent press release, NASA did not directly tie the warming to humans and the burning of fossil fuels, which emits carbon dioxide, a key greenhouse gas.
		A natural warming cycle is technically possible, he said, but not likely given how closely the warming and models track.
	www.msnbc.msn.com /id/11745704 (603 words)

	Greenhouse Effect, Global Warming Facts and Greenhouse Gas Emissions Data Trends
		As can be seen from Table 2, almost 70 percent of the anthropogenic contribution to global warming in 1990 was due to CO Attention has focused on CO emissions both because anthropogenic CO emissions far exceed other anthropogenic emissions and because of the availability of data.
		The USDOE Energy Information Administration's Emissions of Greenhouse Gases in the United States covers all GHGs.
		USDOE's Annual Energy Outlook is devoted to energy production and use in the United States while the International Energy Outlook provides data for both the United States and the rest of the world.
	www.pewclimate.org /global-warming-basics/facts_and_figures (559 words)

	Paleoclimate, Greenhouse Warming, El Nino & Climate Change
		The white and red areas indicate unusual patterns of heat storage; in the white areas, the sea surface is between 14 and 32 centimeters (6 to 13 inches) above normal; in the red areas, it's about 10 centimeters (4 inches) above normal.
		The surface area covered by the warm water mass is about one and one-half times the size of the continental United States.
		The added amount of oceanic warm water near the Americas, with a temperature between 21-30 degrees Celsius (70-85 degrees Fahrenheit), is about 30 times the volume of water in all the U.S. Great Lakes combined.
	jrscience.wcp.muohio.edu /html/globalchange.html (1686 words)

	The Warming Greenhouse
		Understanding more how the Earth works can help us understand how our planet acts like a greenhouse and how changes in the balance of the Earth system can change the climate.
		The Sun is the source of all energy on our planet.
		Currently the system is not in balance and more heat is let in than is let out.
	eo.ucar.edu /kids/green/warming1.htm (131 words)

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