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Jennifer Garcia

HowStuffWorks "If the polar ice caps melted, how much would the oceans rise?" - 2 views

science.howstuffworks.com/...question473.htm

ice caps global warming temperature heat sea level climate change'

shared by Jennifer Garcia on 24 Jan 13 - No Cached
  • You may have heard about global warming. It seems that in the last 100 years the earth's temperature has increased about half a degree Celsius. This may not sound like much, but even half a degree can have an effect on our planet. According to the U.S.
  • But the rising temperature and icebergs could play a small role in the rising ocean level. Icebergs are chunks of frozen glaciers that break off from landmasses and fall into the ocean. The rising temperature may be causing more icebergs to form by weakening the glaciers, causing more cracks and making ice mo­re likely to break off. As soon as the ice falls into the ocean, the ocean rises a little.
  • The main ice covered landmass is Antarctica at the South Pole, with about 90 percent of the world's ice (and 70 percent of its fresh water). Antarctica is covered with ice an average of 2,133 meters (7,000 feet) thick. If all of the Antarctic ice melted, sea levels around the world would rise about 61 meters (200 feet). But the average temperature in Antarctica is -37°C, so the ice there is in no danger of melting. In fact in most parts of the continent it never gets above freezing.
  • ...2 more annotations...
  • There is a significant amount of ice covering Greenland, which would add another 7 meters (20 feet) to the oceans if it melted. Because Greenland is closer to the equator than Antarctica, the temperatures there are higher, so the ice is more likely to melt.
  • But there might be a less dramatic reason than polar ice melting for the higher ocean level -- the higher temperature of the water. Water is most dense at 4 degrees Celsius. Above and below this temperature, the density of water decreases (the same weight of water occupies a bigger space). So as the overall temperature of the water increases it naturally expands a little bit making the oceans rise.
  • Jennifer Garcia on 31 Jan 13
     
    the temperature of the world has increased .5 degrees Celsius over the last 100 years. The heat is melting the icebergs. The sea levels have risen 15-20cm over the last 100 years.90% of the world's ice is in Antarctica.
soledad05

How To Kill The Manmade Global Warming Hoax | JunkScience.com - 0 views

junkscience.com/...he-manmade-global-warming-hoax

global warming warming hoax sun climate change

shared by soledad05 on 24 Jan 13 - No Cached
  • It seems like there’s a new article appearing almost daily on the Internet with new and shocking evidence that the entire manmade global warming story has been a hoax. But is anyone really listening or doing anything about it?
  • None of the new scientific reports and studies that prove global warming is a hoax are ever seen in the major media, and even if they were, they’re above most people’s heads, or at least outside their attention span. Instead we need to keep repeating the basic scientific facts about climate change: 1) That climate change drives CO2 levels, and 2) That the earth in fact is relatively cool right now, and that constantly changing cycles of solar activity are the real reason for climate change.
  • soledad05 on 24 Jan 13
     
    Hoax? 
prili 1

Global Warming: News, Facts, Causes & Effects | LiveScience - 0 views

www.livescience.com/...global-warming

Global

shared by prili 1 on 24 Jan 13 - No Cached
  • Global warming is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth’s climate. There is great debate among many people, and sometimes in the news, on whether global warming is real (some call it a hoax). But climate scientists looking at the data and facts agree the planet is warming. While many view the effects of global warming to be more substantial and more rapidly occurring than others do, the scientific consensus on climatic changes related to global warming is that the average temperature of the Earth has risen between 0.4 and 0.8 °C over the past 100 years. The increased volumes of carbon dioxide and other greenhouse gases released by the burning of fossil fuels, land clearing, agriculture, and other human activities, are believed to be the primary sources of the global warming that has occurred over the past 50 years. Scientists from the Intergovernmental Panel on Climate carrying out global warming research have recently predicted that average global temperatures could increase between 1.4 and 5.8 °C by the year 2100. Changes resulting from global warming may include rising sea levels due to the melting of the polar ice caps, as well as an increase in occurrence and severity of storms and other severe weather events.
  • prili 1 on 24 Jan 13
     
    what is global warming
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