According to a professor at Rice University‚ the weathering of Earth by glaciers over many eons could have sped up the release of carbon dioxide into the atmosphere. The study conducted by Mark Torres‚ an assistant professor of Earth‚ environmental‚ and planetary sciences shows that a process called glaciation most likely increased the amount of carbon dioxide being released into our environment. The team of researchers also discovered that magnified pyrite (commonly known as fool’s gold) oxidation
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concentrations of CO2 occur naturally during glacial periods and high concentrations during interglacial periods (present). 2007 measured 383 parts per million. | The number of CO2 sequences that correlate well with each other suggest it is reliable. | Ice cores – O2 isotopes | Ratio of oxygen 16 to 18 is a good indicator of past sea levels. In glacial periods oxygen 16 evaporation more from oceans which became enriched with oxygen 18. Ice from glacial periods is enriched with oxygen 16. | The number
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Name: Lauren Strickland Date: 3/12/14 Student Exploration: Building Pangaea Vocabulary: continental drift‚ fossil‚ glacier‚ ice age‚ landmass‚ Pangaea‚ supercontinent Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Antarctica is a frozen land‚ so cold and icy that no trees can grow there. Yet scientists have discovered fossils (remains preserved in rock) of ancient trees in Antarctica. What do you think this means? That Antarctica was once a part of the
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Global warming is the increase in the average temperature of the Earth’s near-surface air and oceans in recent decades and its projected continuation. Global average air temperature near the Earth’s surface rose 0.74 ± 0.18 °C (1.3 ± 0.32 °F) during the past century. The Intergovernmental Panel on Climate Change (IPCC) concludes‚ "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas
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air where cooler temperatures cause it to condense into clouds. Air currents move clouds around the globe‚ cloud particles collide‚ grow‚ and fall out of the sky as precipitation. Some precipitation falls as snow and can accumulate as ice caps and glaciers‚ which can store frozen water for thousands of years. Snowpacks in warmer climates often thaw and melt when spring arrives‚ and the melted water flows overland as snowmelt. Most precipitation falls back into the oceans or onto land‚ where‚ due to
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condense into clouds. Air currents move water vapor around the globe‚ cloud particles collide‚ grow‚ and fall out of the upper atmospheric layers as precipitation. Some precipitation falls as snow or hail‚ sleet‚ and can accumulate as ice caps and glaciers‚ which can store frozen water for thousands of years. Most water falls back into the oceans or onto land as rain‚ where the water flows over the ground as surface runoff. A portion of runoff enters rivers in valleys in the landscape‚ with streamflow
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Spurn Point in the south‚ a distance of 61 km. The Holderness Coast is famous due to its history of being one of Europe’s fastest eroding coastlines. Essentially erosion is the process by which coastline rocks are broken up by the action of the sea and transported out to sea or along the coast by waves and the wind. Coastal erosion can occur in numerous forms: Seawater can compress air into cracks in rocks. When the air escapes it does so under pressure and shatters the rock (hydraulic action)
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of Earth ’s surface is covered by water bodies. 97 per cent of this water is present in oceans as salt water and is unfit for human consumption. Fresh water accounts for only about 2.7 per cent. Nearly 70 per cent of this occurs as ice sheets and glaciers n Antarctica and other inaccessible places. Only one per cent of fresh water is available and fit for human use. So it is very important to conserve this precious resource. And yet we are contaminating the existing water resources with sewage‚ toxic
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fern fossils in the Antarctica which shows it used to be more equatorial. There are also glacial deposits in India‚ South America and Australia which are too hot for glaciers today. Another piece of evidence is Structural trends as if the continents are fitted together then all the mountain ranges line up‚ suggesting that they have been split. Continents also partially fit together but not totally due to erosion. However each continent has a shelf 150ft below the surface which all fit together perfectly
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years ago‚ the Alps were covered with a thick blanket of snow. Glaciers moved down valleys and made them wider and deeper. As they moved they took rock and other material with them‚ creating moraines. When glaciers started to melt water filled up behind these natural dams and created the alpine lakes we know today.47 The largest of these glaciers is the Aletsch in Switzerland which reaches a length of about 25 km. The longest glacier of the eastern Alps is the 8 km long Pasterze‚ at the foot of
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