Antarctica and it’s role in the Global Climate System
The Climate of the world is made up of numerous collaborating sub-atmosphere frameworks. This paper will talk about the impact of Antarctica and its encompassing waters on each of these sub-climatic frameworks. The frameworks include: the environment, hydrosphere, cryosphere, and biosphere. The impact that Antarctica and its encompassing waters have on the atmosphere framework, as we know is connected to a fragile offset of Antarctic conditions. Cool surface temperatures and the solid Coriolis effect at high scopes make the South Polar Cell, which depicts climate designs all through Southern Australia, America, and Africa. The Antarctic waters additionally assume an urgent part in carbon
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THC is a system of currents is responsible for the circulation of deep ocean water. Its mechanism is density gradients caused by regional variations in temperature and salinity. Cool water is denser than warmer water, and more saline water is denser than fresher water. Warm, fresh water from the tropics moves to the poles via surface currents, where it sinks and is replaced by rising deep water at low latitudes. This system is responsible for the distribution of heat from equator to pole, and is consequently an important climatic process. The Southern Ocean is origin of the Antarctic Bottom Water, the most prevalent deep water mass. It forms when surface water at the Ross and Weddell ice shelves cools through contact with the atmosphere. When sea ice forms in polynyas at these sites, brine is squeezed from the forming crystals and makes the surrounding ocean more saline. The combination of low temperature and high salinity cause the water to sink to the ocean floor. As new deep water is formed, the existing bottom water is pushed towards the equator and beyond it. Some bottom water rises near the equator, bringing nutrient rich cool water to the surface for the cycle to begin again. THC regulates temperatures at high latitudes by supplying heat. Without the cool conditions which lead to the formation of the Antarctic Bottom Water, …show more content…
In addition to the biological processes described in section 5, chemical interactions known as the physical pump between the atmosphere and ocean lead to carbon uptake. When dissolved in seawater, carbon dioxide forms carbonate and bicarbonate ions. Greater quantities of carbon can be stored in this form than the form found in the atmosphere, and consequently, the global oceans are able to store more than a quarter of carbon dioxide produced by humans. The Southern Ocean is believed to store up to half of this carbon. Given the central role of carbon uptake in mitigating the greenhouse effect, this function of the Antarctic hydrosphere has a vital moderating effect on the global climate
Sine there is enough sunlight it helps the process. The second zone is known as the Pycnocline Zone. With the more depth one goes underwater, the colder it becomes. This is called the Thermocline. Thermocline is “oceanic water layer in which water temperature decreases rapidly with increasing depth” (Britannica).
A change in oceanography which allowed for warmer waters which is more habitable
The initiation of a Snowball Earth, involves a cooling mechanism in which an increase in the Earth’s coverage of snow and ice occurs. As mentioned previously, an increase in ice and snow coverage would result in an increase in the reflected fraction of solar radiation known as albedo. Increase in albedo causes a positive feedback for cooling.. That means, if enough snow and ice accumulates, farther cooling would result accompanied with larger areas being covered with more and more ice, and so on. The equatorial distribution of continents assists the positive feedback by allowing ice to accumulate in the regions closer to the equator, where solar radiation is direct (Hyde et al, 2000).
The earth was covered with extensive polar and mountainous sheets of ice. So much water was taken up with ice that the global sea level dropped almost 140 meters. This time in earth’s history would be considered a glacial period. Oceanic circulation, solar energy fluctuations, continental positions and earth 's orbital cycle caused these conditions. Glacial global temperature changes between the ice ages and interglacial periods were due to the concentration of greenhouse gases.
The cooled air over the land moves in to take the place of the rising warm air over the water. That is how bodies of water can affect the
This article discusses the increase in meltwater coming from the Greenland Ice sheet due to global warming and how this affects the number of nutrients that get delivered to the ocean. The scientist’s in this study accumulated four years of data which is consistent with and backs up their hypothesis. The data the scientists collected was from the Leverett Glacier which is located in the Greenland Ice Sheet. They found a strong correlation between the amount of meltwater and the number of nutrients. When meltwater increases, nutrients seem to increase as well.
o Water Density: This is caused by the amount of salt in a body of water and its temperature. Water with higher salinity, or colder water, is more dense and likely to sink. Sinking water pushes the water below it up. The combination of sinking and rising in the same area causes a current.
The Many Layers of the Ocean With the ocean taking up over 70 percent of Earth it has been broken down to layers in order to classify the ocean depth and the components in each section that vary by location. The components in each layer are caused by many factors including sunlight, temperatures, weather, and many other factors that can vary from location. The first layer is the Sunlight Zone which is located at the depth of approximately 200 meters. The Sunlight Zone is hit with the most amount of light from the sun which causes temperature changes based on location and seasons.
1.Cory Brunish doubts the necessity of exploring Mars, for those huge amounts of money could have been used in other more profitable and benevolent projects like projects about fighting against fatal diaereses and solving social problems.(Brunish, 2004 p9) 2. Speed is essential in Mars, for the space trip is actually torturing and fatal, because in the space astronauts have been exposed in the harmful space radiation, and the lack of the protection of earth’s magnetic field worsen astronauts’ situation.(Kluger, 2004 p42) 3. Cousteau states that Antarctic is indispensable, for it moderates earth’s climates. It cools both surface water’s and atmosphere’s temperatures. However, human activities has threaten this delicate system.(Cousteau, 1990,p17)
Youssef Adhoum, A4/B4 Class Mr. Hewett Humans habits has lead to extreme pollution and continuous melting of Antarctica. In a couple millennia, Antarctica will be nothing but a plain sheet of ice. Due to no so environmentally friendly human habits, Antarctica has been exposed to over 992 million tons of carbon dioxide. Carbon dioxide (a type of greenhouse gas) itself isn't the cause of global warming. The sun is actually melting the ice, but the sun isn’t strong enough to melt the ice by itself, that is where carbon dioxide plays its role.
Examinations conclude that a great number of ice shelves are due to disintegrate caused by ocean warming alone. Ocean levels continue to increase at an alarming rate. Glacial melting in Antarctica will have a global impact. Therefore, this is a matter that should be handled by everyone globally. Currently, there appears to be clear control over the climate of Antarctica, assisting in determining what path the continent is on and the direct it leans towards.
The drop in sea ice will result in very different environments. For example the Canadian Arctic Archipelago has more than 36,000 islands all connected my sea ice if
This is due to the thinning observed at glacier snouts. For information, global sea level are currently rising at rate about 3 mm per year, Davies (2014). Hence, the amount of higher sea level will not only depends on the glacier recession, temperature and warming of the ocean but also the dynamic behaviour of West Antartic Ice Sheet. It receives high snowfall and also contribute high tendency to melt, which receive more number of days above 0℃ during summer months. Due to high temperature and thinning glacier, it will become thin and easy to diminish which make more easier to float.
Scientists believed that life began 3.5 billion years ago when chemicals containing carbon were mixed by chance. They combined to become living things. Each generation of living things can be delicately different from the last one. Over a long period, these small alteration become big disparity. This is evolution.
Temperature change has allowed for more plant life to grow and Antarctica to become