Ice-sheet dynamics Sampling the surface of Taku Glacier in Alaska. There is increasingly dense firn between surface snow and blue glacier ice. An ice core is a vertical column through a glacier, sampling the layers that formed through an annual cycle of snowfall and melt. At Summit Camp in Greenland, the depth is 77 m and the ice is years old; at Dome C in Antarctica the depth is 95 m and the age years.
As a Extraction of blue ice area in antarctica, anthropogenic global warming has recently become a major concern for humanity. Such concerns are supported worldwide by the wide majority of climatologists.
Global warming is an increase in temperature in addition to the natural greenhouse effect. The greenhouse effect interacts with other planet-wide influences such as the Milankovitch cycles in order to produce long-term climate movements.
Many gases contribute to the greenhouse effect, some of the most important being water vapor, methane and carbon dioxide. The ability of these gases to act as greenhouse gases can be shown in a laboratory.
The increase in temperature has been caused by the increase in greenhouse gases. Note that the statement that The increase in global temperature correlates with the increases of greenhouse gases is only true on a very broad timescale: GHGs have increased roughly exponentially but the temperature signal is far noisier, and displays almost no correlation with GHG changes on an annual basis, as expected.
This is due to a variety of factors, from intrinsic noise in the climate system to the existence of other important forcing factors most notably sulphate aerosols and global dimming, which are cooling factors.
Also note that while water vapour is correctly listed as a GHG, the human emissions of water vapor are not important in forcing climate change; water vapour is best thought of as a response to temperature change rather than a cause, because its atmospheric lifetime is very short about 10 daysunlike other gases such as CO2.
The International Energy Agency suggests that the window to prevent this from occurring will close by a view shared by the OECD. CO2 emissions have been stabilizing but methane emissions have risen dramatically during the past ten years for unknown reasons. This undermines efforts to combat global warming and there is a risk of an uncontrollable run away greenhouse effect.
The error bars, particularly on the negative components, are currently the focus of much climate research in order to improve predictive climate models.
A scientific consensus is reached when the vast majority of the scientists involved in a discipline broadly agree on the interpretation of the evidence pertaining to a specific scientific question. When this occurs the case can be considered to have been demonstrated and the burden of proof then falls on those who would dispute the consensus.
The following national and international organizations are part of the consensus that global warming is a real phenomenon for which humans are responsible: Though some have taken non-committal stances, the vast majority of scientific bodies are convinced by the evidence.
Anyone who, even after the occurrence of extreme weather events that seem to intensify yearly, does not see the validity of decades of scientific documentation that catalogues the existence of global warming, is a lost cause.
Simply put, time is of the essence. Ongoing experiments aim at obtaining the CO2 from clean coal plants equipped with carbon capture technology. Although the technology itself seems to work  it is not clear how sequestering coal CO2 to help produce more oil will affect atmospheric CO2.
Scrubbing atmospheric CO2[ edit ] Air capture technology to collect CO2 is routinely used in spacecraft and submarines.
In all ~ 45 ice shelves adorn almost half the Antarctica coastline, and represent an area of ~ million km², close to 10 percent of the total ice that covers Antarctica. Iceberg B, which calved from the Ross Ice Shelf of Antarctica in , was half a mile thick and covered an area of about 4, square miles (about the size of Connecticut). B subsequently broke into smaller pieces, named BA, BB, and so on. In this study, for extraction of frozen lakes by using Yellow ( – nm) and near-infrared 2 (NIR2) band pair and Yellow and Green band pair worked well, whereas for open lakes extraction, combination of Blue and Coastal band yielded appreciable results which when compared with manually digitized data provided a good match.
However, it requires energy to operate and a study estimated that processing the whole atmosphere would not be cost-effective. One of the authors noted that planting vegetation is more feasible but would require a significant amount of land.
One good example of plants that consume plenty of CO2 are pine trees used in farming.
Though they tend to use the nutrients in the ground, in theory they can be replenished from biosolids refined animal feces. Decomposing plants release CH4, an even worse greenhouse gas than CO2 and there is simply not enough storage on earth for all the wood forests of the needed magnitude would produce.
However, we could bury the resulting biomass underground, in effect recreating the origin of the fossil fuels that got us into this mess in the first place. Living with it[ edit ] Climate change is expected to affect farming practices by requiring a shift in corn planting windows."50 shades of blue: Bahamas" ice from Antarctica's interior can discharge into the ocean when they collapse.
Consequently we will see increase in the ice-sheet contribution to global sea-level. findings of meteorites in the Antarctic Queen Maud Land area well known (Lazarev, areYamato). The blue ice places near the Novolazarevsaya Antarctic station clearly visible onare satellite images, but .
Icebergs An iceberg is a large mass of free-floating ice that has broken away from a glacier. Beautiful and dangerous, icebergs wander over the ocean surface until they melt. Most icebergs come from the glaciers of Greenland or from the massive ice sheets of Antarctica .
A vast, icy continent at the very south of the planet, the Antarctic is a land of extremes. Larger than Europe and nearly twice the size of Australia, it is almost entirely buried beneath an ice sheet which covers around 99 percent of the land grupobittia.com Antarctic ice sheet contains 90 percent of the world’s ice and around 70 percent of its freshwater.
consisting of nunataks, trending NNE-SSW and is m above the surface of blue ice (Map B).
The primary reason for designation of the Area as an Antarctic Specially Protected Area is to protect the unique geomorphological features of the area for scientific research on the evolutionary history of East.
A growing number of foundations and wealthy individuals are concerned about environmental threats to oceans and rivers. Funders take many approaches: some are narrowly focused on specific geographic areas, whiles others giving more broadly.