The February 9, 2007 image shows the area previously occupied by Larsen B ice shelf seen as semi-circular area at the right side of the image. The resulting icebergs from the disintegration flowed to the Weddell sea. These icebergs wouldn’t have raised the sea level since the ice shelf was already floating in water and occupied as much volume as the water that would have been generated when it melted. However, these ice shelves act as brakes to the glaciers flowing out to the sea. So the loss of these shelves can speed up the flow of glaciers to the sea, which can result in the rise of sea level.
These photographs show an enlarged eastward-looking view of a small section of the Hubbard Glacier terminus and the evolution of the “squeeze-push” moraine in front of Gilbert Point that blocked the tidal exchange between Disenchantment Bay (bottom of photos) and Russell Fiord (top of photos), creating Russell Lake which rose to 18.6 metres (61 feet) above sea level over 21⁄2 months before it finally outburst on 14 August 2002, creating the second largest glacial lake outburst worldwide in historical times.
The response to climate change is being observed with the receding glaciers.
The San Quintín Glacier is the largest outflow glacier of the Northern Patagonian Ice Field located in southern region of Chile. As seen in the photographs, this glacier appears to be retreating and losing mass in recent years.
TOPIC: GLOBAL WARMING <ul><li>SUBJECT : BIOLOGY
DISGUSTING EFFECTS <ul><li>An increase in global temperature will cause sea levels to rise and will change the amount and pattern of precipitation , probably including expansion of subtropical deserts.
Warming is expected to be strongest in the Arctic and would be associated with continuing retreat of glaciers, permafrost and sea ice. </li></ul>
EFFECTS <ul><li>Other likely effects include changes in the frequency and intensity of extreme weather events, species extinctions, and changes in agricultural yields.
Warming and related changes will vary from region to region around the globe, though the nature of these regional variations are uncertain. </li></ul>
Greenland is now losing 20 percent more mass than it receives from new snowfall each year. Greenland Ice Sheet
The ice shelf disintegrated suddenly in March 2002 due to warm summer temperatures Disintegration of the Larsen B Ice Shelf, Antarctic Peninsula NASA Earth Observatory
North America: Angangueo <ul><li>1986: Images show Degradation of forest area </li></ul><ul><li>2001: Between 1984 and 1999, 38 per cent of forests were degraded </li></ul>Hubbard Glacier advances United States 14 Aug 2002 10 Aug 2002
North America: Angangueo <ul><li>1986: Images show Degradation of forest area </li></ul><ul><li>2001: Between 1984 and 1999, 38 per cent of forests were degraded </li></ul>Glacier National Park, Montana, United States
The San Quintin Glacier appears to be losing mass and retreating Retreat of San Quintin Glacier, Chile NASA Earth Observatory
Preventive measures <ul><li>Avoid Deforestration </li></ul>DON'T DO THIS
Follow these ! <ul><li>Decrease the use of fossil fuels </li></ul>
<ul><li>Use of eco-friendly resources like solar energy </li></ul>