Tuesday, January 25, 2011

watery wednesday #4 getting warmer

welcome to watery wednesday

Is global warming real? Why global warming exist?

Is global warming real? Some of us me ask such question. Ask the white bears of Churchill, Canada. Polar bears hunts from floating sheets of ice in Arctic seas. On the southwest shore of Hudson Bay, the big fee comes just before the winter ends, when adults bears eat 150 pounds of seal meat  a day. They gorge themselves,fattening their bodies until the icebreaks up in spring. Then the animals must live until November freeze on energy they have stored. Since 1950,However, the ice has been forming later and breaking u earlier.
The amount of ice in Hudson Bay is about one-third less that it was then, making the bears feeding season nearly a month shorter. That’s because the average local temperature has gone up 4.5 celcius. Okay, Don’t ask the bears, ask the scientist. There is no longer any debate about whether global warming is real or not. The arguments are over what is causing it and whether we should or can be doing something about it. Ten of the 15 warmest years of the 20th century occured after 1985 . The average global temperature rose 10 celcius over the last century,and it’s expected to rise another another 1.4-5.8 celcius during the next hundred yers. In the polar regions, the increase may be 10 celcius or more. The Antarctic ice shelf is shrinking. Glaciers are melting from Alaska to Africa, from Peru to China. Sea level has riseb from 10 to 20 centimeters since 1900. It expected to rise about abother.6 meters along the United States costs by 2100. As air warms, evaporation increases. Soil becomes drier in some places, and precipitation increases in others. Landscapes change from tundra to forest from grassland to desert.
Averge global temperatures fluctuate naturally over time but the current change mat also have human causes. Certain gases in the atmosphere trap heat. They are called greenhouse gases, as they have a warming effect like a green house. They include carbon dioxide and nitrous oxide. Industry, farming, and the burning of coal and hydrocarbons have added to the level of greenhouse  gases. Since the industrial age began, the level of carbon dioxide in the atmosphere has  increased by 30 percent. It is expected to rise another 30 to 150 percent by 2100.
Long before then, the polar bears will be gone from Churchill. By 2030, The ice-free season will be three months longer that it is now. The bears will have to migrate north to survive. Elsewhere arount the Globe, animals plant life will have to adapt to climate change in order to survive.
hat about us? how about the human life? Science cannpt predict what the long term effect of global warming might be. But it’s certain that we don’t want to find ourselves in the same situation as those polar bears.
here is the global temperature changes(1880-2010

You might be interested in

Read more: http://scienceray.com/earth-sciences/getting-hotter/#ixzz1C6KRVUb2


  1. Oh my gosh, that is a stunning shot (the last one).

    Beautiful shots!
    Watery Wednesday at my page.

  2. amazing captures. would love to see them in their natural habitat.

  3. wow, i love the polar bear photo! global warming is getting real everyday. it's scary, too.

  4. Those bears look so dramatic on the ice!

  5. As I said on my blog. Climate scientists at U. of Toronto built a computer weather model that indicated if we cut carbon emmissions to O now, the earth will continue to warm well into the 3000's. Warming doesn't just bring warm temperatures, it changes the earth's ecology. Where I live we did not have snow until mid Dec., normally we would have it mid or early Nov. That snow is our water supply which feeds all of the Great Lakes and then the US. More bluntly if I have half a glass of water here, how much do you have south of me, and then further south again? Good post. Boom & Gary of the Vermilon River, Canada.