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Atmospheric Heat Fluxes and Restoration of Circumglobal
Atmospheric Heat Fluxes and Restoration of Circumglobal

... a steady state situation with the ocean currents rotating around the globe. In the past, whenever there has been a return to ice conditions, this was preceded by a rise in greenhouse gases, followed by a sudden drop. For the past 3 million years, the CO2 levels in the atmosphere have been low. Howev ...
PDF sample
PDF sample

... destabilize a second huge ice sheet in west Antarctica, which would raise sea levels by a further 23 feet. Nobody is yet sure if such a catastrophic chain of events could occur. But when we dig up and burn carbon that has been buried for tens of millions of years, we are playing with re. And our unc ...
<xref ref-type="transliteration" rid="trans9" ptype="t4314547" citart


... relatively well with the SPECMAP oxygen-isotope record, imposed. These kinds of broad climatic features are those exthe size and extent of the individual Northern Hemisphere plained by the astronomicaltheory of paleoclimates(7-9). Proponents of this theory claim that the changes in the Earth'sorice ...
Document
Document

... • Movement of tectonic plates • Can change ocean circulation ...
Ice Age Coming Now
Ice Age Coming Now

... decrease in global warming” (7), or “by 3.53°C when 40% cloud cover is assumed” (8) are still being heard. A clear demonstration is needed to show that water vapor and clouds do indeed behave as fast feedback processes and that their atmospheric distributions are regulated by the sustained radiative ...
Climate Change - COSEE Florida
Climate Change - COSEE Florida

... • Led to burning of fossil fuels – Burning of fossil fuels is similar to cellular respiration – Humans have altered the carbon cycle – we are releasing more carbon dioxide into the atmosphere ...
Kansas Geological Survey  Public Information Circular 28
Kansas Geological Survey Public Information Circular 28

... most of the sun’s heat reaches the northern latitudes, interglacial periods occur. This happened about 10,000 years ago and caused the North American ice sheets to melt (Pielou, 1991). Since then, the quantity of solar radiation reaching the northern latitudes has declined and the Milankovitch effec ...
"An Ice Core Time Machine." Earth
"An Ice Core Time Machine." Earth

... respectively, thirty percent and fifty percent lower than levels during interglacial periods, when global temperatures are warmer. These gases absorb a portion of the outgoing radiation and reflect it back to Earth, creating what is known as the greenhouse effect. (See Charles F. Keller’s essay, in ...
Teaching material - Climate Change
Teaching material - Climate Change

... represent our World. Ask everyone what things they did today that used energy. For each item or appliance mentioned, place a blanket over the heads of the four children at the front to represent the carbon dioxide released when burning fossil fuels! After four blankets are placed on their head, ask ...
Slide 1 - climateknowledge.org
Slide 1 - climateknowledge.org

... • They can indirectly impact radiative budget through their effects on clouds  both reflection and absorption. • They have many different compositions, and the composition matters to what they do. • They have many different, often episodic sources. • They generally fall out or rainout of the atmosp ...
an_elephant_in_a_che.. - Tech-Know
an_elephant_in_a_che.. - Tech-Know

... times more CO2 on Mars than on Earth. (30 represents the concentration at the surface and 9 takes into account the total volume of the atmosphere which is substantially smaller than that of Earth). The greenhouse effect on Mars is only 5 degrees C. If we use the “9 times” factor for comparison to th ...
Author
Author

... Yes it has! There was a time when large areas of our planet were covered with huge, thick ice sheets and enormous glaciers. About forty million years ago began the first ice age, and there have been four such icy times since then. Glaciers have grown and shrunk, and at one time, reached where New Yo ...
A cool early Earth - University of Wisconsin
A cool early Earth - University of Wisconsin

... Limits on temperature for near-surface alteration of the protolith of the high-d18O 4.4 Ga magma can be calculated from the d18O of the early hydrosphere, the fractionation of 18O/16O between basalt (or granite) and water, and the stability of liquid water versus steam. Temperatures must have been i ...
Ice Cores - Siemens Science Day
Ice Cores - Siemens Science Day

... Ice cores contain information about climate.  The presence of snow from each year remains in the ice and could include wind-blown dust, ash, pollen, bubbles of atmospheric gas, and radioactive substances. Ice is one of the best preservers of the remains of prehistoric life.  Although rare, they are ...
NITIN GAWALI & PATIL PRAVIN
NITIN GAWALI & PATIL PRAVIN

... Only about half of all solar energy that reaches the Earth is infrared radiation and causes immediate warming when passing the atmosphere. The other half is of a higher frequency, and only translates into heat once it hits Earth and is later reflected back into space as waves of infrared radiation. ...
MSWord
MSWord

... Eventually, mixing of the deep and shallow layers brings the water back to the surface at the opposite end of the conveyor belt in regions distant from where the carbon dioxide was first absorbed, generally in the tropics. In the tropical regions, warm waters cannot retain as much carbon dioxide and ...
Changes in Earth`s Reflectance over the Past Two Decades
Changes in Earth`s Reflectance over the Past Two Decades

... sampling. To demonstrate this, we artificially shifted the days (and times) of our ES observations, so that different ISCCP subsets were used within their proper, or adjacent, lunar months; the results in Fig. 3 did not change. Further, if the reconstructed series is divided between positive and neg ...
Why Are the Ice Caps Melting? - cerser
Why Are the Ice Caps Melting? - cerser

... formed, why they move, and how they affect the land and people. For those studying global warming, the section on "how glaciers reflect climate change" is of particular interest. Easy and quick to read, with a nice gallery of photographs, this site makes a good starting place for those interested in ...
PPT
PPT

... • Today these gases are relatively rare on Earth compared to other places in the universe. • Were probably lost to space early in Earth's history because – Earth's gravity is not strong enough to hold lightest gases – Earth still did not have a differentiated core, which creates Earth's magnetic fie ...
Lecture13_Atmospheres Part 2_sm
Lecture13_Atmospheres Part 2_sm

... •  Today these gases are relatively rare on Earth compared to other places in the universe. " •  Were probably lost to space early in Earth's history because" –  Earth's gravity is not strong enough to hold lightest gases" –  Earth still did not have a differentiated core, which creates Earth's magn ...
The Big Questions - Assets - Cambridge
The Big Questions - Assets - Cambridge

... than in winter, and why the summer/winter temperature range has the value that it does (e.g. 30 ◦ C in Chicago) and why the variation is generally lower over the oceans (e.g. 7 ◦ C in the middle of the Pacific Ocean, at the same latitude as Chicago). If you communicate with friends living in the Arct ...
Greenhouse effect: Who has the answers?
Greenhouse effect: Who has the answers?

... has allowed life on earth to develop in the way it has. Too much greenhouse gas, however, will make the earth too warm. ...
Word Doc
Word Doc

... 6.5 Mass extinctions occur when global conditions change faster than large numbers of species adapt. Mass extinctions are often followed by high rates of origination of new species as life evolves and fills vacated niches. 6.6 Microorganisms dominated Earth’s early biosphere and continue today to be ...
Adobe PDF
Adobe PDF

... 6.5 Mass extinctions occur when global conditions change faster than large numbers of species adapt. Mass extinctions are often followed by high rates of origination of new species as life evolves and fills vacated niches. 6.6 Microorganisms dominated Earth’s early biosphere and continue today to be ...
Lab - El Camino College
Lab - El Camino College

... have been on the Earth for at least a couple hundred thousand years. (My understanding is that scientists have difficulty determining whether many 200,000 to 500,000-year-old fossils are from homo erectus or homo sapiens: they are too similar.) However, human civilization (humans farming and buildin ...
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Snowball Earth

The Snowball Earth hypothesis posits that the Earth's surface became entirely or nearly entirely frozen at least once, sometime earlier than 650 Mya (million years ago). Proponents of the hypothesis argue that it best explains sedimentary deposits generally regarded as of glacial origin at tropical paleolatitudes, and other otherwise enigmatic features in the geological record. Opponents of the hypothesis contest the implications of the geological evidence for global glaciation, the geophysical feasibility of an ice- or slush-covered ocean, and the difficulty of escaping an all-frozen condition. A number of unanswered questions exist, including whether the Earth was a full snowball, or a ""slushball"" with a thin equatorial band of open (or seasonally open) water.The geological time frames under consideration come before the sudden appearance of multicellular life forms on Earth known as the Cambrian explosion, and the most recent snowball episode may have triggered the evolution of multi-cellular life on Earth. Another, much earlier and longer, snowball episode, the Huronian glaciation, which occurred 2400 to 2100 Mya may have been triggered by the first appearance of oxygen in the atmosphere, the ""Great Oxygenation Event.""
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