For links to unpublished articles talks, pamphlets, letters etc , and for abstracts and descriptions of published articles, choose 'Writing' from the top menu and select the topic from the menu that appears in the sidebar. University of Pittsburgh Press. Challenging Liberal Peace in Eurasia: Critical Perspectives on Peace and Conflict: Rowman and Littlefield Martin Luther King Peace Committee. Reflections on practice', Political Geography , 34 1 , pp. Understanding and Responding to Nationalism.
An agenda for peace research and practice in geography. Political Geography 30 4: International Affairs 87 3: The Discourse of danger. Gothic Kyrgyzstan and the collapse of the Akaev regime.
Review of International Studies. Stalin's Cartography, Post-Soviet Geography. In Borderlines and Borderlands: This outflow is about 9 Sv. Because of this, it is influenced by the Coriolis force , which concentrates outflow to the East Greenland Current on the western side and inflow to the Norwegian Current on the eastern side.antiquesfromdelft.com/modules/funu-comprare-hydroxychloroquine.php
JSTOR: Access Check
As noted, the process of ice formation and movement is a key driver in Arctic Ocean circulation and the formation of water masses. With this dependence, the Arctic Ocean experiences variations due to seasonal changes in sea ice cover.
Sea ice movement is the result of wind forcing, which is related to a number of meteorological conditions that the Arctic experiences throughout the year. For example, the Beaufort High—an extension of the Siberian High system—is a pressure system that drives the anticyclonic motion of the Beaufort Gyre.
- Security Consulting Business.
- Freerunning (German Edition);
- Eurasia Border Review Vol. 5, No. 2 2014 Fall;
- In a Pondering Mood.
- Devils Twin Swords Book 7 - Edited?
- RED: The Ultimate Guide to Using the Revolutionary Camera.
In addition, there is a sea level pressure SLP ridge over Greenland that drives strong northerly winds through the Fram Strait, facilitating ice export. In the summer, the SLP contrast is smaller, producing weaker winds. A final example of seasonal pressure system movement is the low pressure system that exists over the Nordic and Barents Seas. It is an extension of the Icelandic Low , which creates cyclonic ocean circulation in this area.
The low shifts to center over the North Pole in the summer. These variations in the Arctic all contribute to ice drift reaching its weakest point during the summer months. There is also evidence that the drift is associated with the phase of the Arctic Oscillation and Atlantic Multidecadal Oscillation. Much of the Arctic Ocean is covered by sea ice that varies in extent and thickness seasonally.
The sea ice is affected by wind and ocean currents, which can move and rotate very large areas of ice. Zones of compression also arise, where the ice piles up to form pack ice. Icebergs occasionally break away from northern Ellesmere Island , and icebergs are formed from glaciers in western Greenland and extreme northeastern Canada. Icebergs are not sea ice but may becoming embedded in the pack ice. Icebergs pose a hazard to ships, of which the Titanic is one of the most famous. The ocean is virtually icelocked from October to June, and the superstructure of ships are subject to icing from October to May.
Under the influence of the Quaternary glaciation , the Arctic Ocean is contained in a polar climate characterized by persistent cold and relatively narrow annual temperature ranges. Winters are characterized by the polar night , extreme cold, frequent low-level temperature inversions, and stable weather conditions. Cyclones are more frequent in summer and may bring rain or snow. The temperature of the surface of the Arctic Ocean is fairly constant, near the freezing point of seawater.
The density of sea water, in contrast to fresh water, increases as it nears the freezing point and thus it tends to sink. This is one reason why the Arctic does not experience the extreme temperatures seen on the Antarctic continent. There is considerable seasonal variation in how much pack ice of the Arctic ice pack covers the Arctic Ocean.
Much of the Arctic ice pack is also covered in snow for about 10 months of the year. The climate of the Arctic region has varied significantly in the past. Endangered marine species in the Arctic Ocean include walruses and whales. The area has a fragile ecosystem which is slow to change and slow to recover from disruptions or damage.
The Arctic Ocean has relatively little plant life except for phytoplankton. However, the reverse is true in winter when they struggle to get enough light to survive.
Internal Server Error
Petroleum and natural gas fields , placer deposits , polymetallic nodules , sand and gravel aggregates , fish, seals and whales can all be found in abundance in the region. The political dead zone near the center of the sea is also the focus of a mounting dispute between the United States, Russia, Canada, Norway, and Denmark. The Arctic ice pack is thinning, and in many years there is also a seasonal hole in the ozone layer.
Warming temperatures in the Arctic may cause large amounts of fresh meltwater to enter the north Atlantic, possibly disrupting global ocean current patterns. Potentially severe changes in the Earth's climate might then ensue. As the extent of sea ice diminishes and sea level rises, the effect of storms such as the Great Arctic Cyclone of on open water increases, as does possible salt-water damage to vegetation on shore at locations such as the Mackenzie's river delta as stronger storm surges become more likely.
Sea ice , and the cold conditions it sustains, serves to stabilize methane deposits on and near the shoreline,  preventing the clathrate breaking down and outgassing methane into the atmosphere, causing further warming. Melting of this ice may release large quantities of methane , a powerful greenhouse gas into the atmosphere , causing further warming in a strong positive feedback cycle and; marine genus and species to become extinct.
Other environmental concerns relate to the radioactive contamination of the Arctic Ocean from, for example, Russian radioactive waste dump sites in the Kara Sea  and Cold War nuclear test sites such as Novaya Zemlya. The agreement calls for those nations to refrain from fishing there until there is better scientific knowledge about the marine resources and until a regulatory system is in place to protect those resources.
From Wikipedia, the free encyclopedia. The smallest and shallowest of the world's five major oceans, located in the north polar regions. For the cargo ship, see MV Arctic Sea. Distribution of the major water mass in the Arctic Ocean. The section sketches the different water masses along a vertical section from Bering Strait over the geographic North Pole to Fram Strait. As the stratification is stable, deeper water masses are more dense than the layers above. Climate change in the Arctic. Natural resources of the Arctic , Territorial claims in the Arctic , and Marine mammal.
Marine extinction intensity during the Phanerozoic.
Millions of years ago. The Permian—Triassic extinction event the Great Dying may have been caused by release of methane from clathrates. Arctic portal Geography portal. Archived from the original on 9 December As an approximation, the Arctic Ocean may be regarded as an estuary of the Atlantic Ocean. Retrieved 7 December The Center for the Study of First Americans. Department of Anthropology, University of Waterloo. Retrieved 1 June Retrieved 16 December The New York Times Almanac ed.
New York, New York: Archived from the original PDF on Archived from the original on 29 October Retrieved 11 November Archived from the original on Archived from the original on 7 December Retrieved 18 November Talley, Pickard, Emery, Swift. Retrieved 2 November Going Around at the Top of the World. Routes, resources, governance, technology, and infrastructure". Archived PDF from the original on 5 December The Arctic Climate System 2nd ed. Archived from the original on 17 January National Oceanic and Atmospheric Administration.
Richard Black, 7 October Retrieved 3 November Retrieved March 8, The methane time bomb".
Related Eurasia: World Boundaries Volume 3: Volume 2 (World Boundaries Series)
Copyright 2019 - All Right Reserved