| 词条 | Beaufort Sea |
| 释义 |
| name = Beaufort Sea | image = Beaufortzee.PNG | caption = | image_bathymetry = | caption_bathymetry = | location = | coords = {{coord|72|N|137|W|type:waterbody_scale:10000000|display=inline, title}} | type = Sea | inflow = | outflow = | catchment = | basin_countries = Canada, United States | length = | width = | area = {{convert|178000|km2|abbr=on}} | depth = {{convert|124|m|abbr=on}} | max-depth = {{convert|4683|m|abbr=on}} | volume ={{convert|22000|km3|acre.ft|abbr=on}} | frozen =Almost all year round | reference = [1][2][3] }} The Beaufort Sea ({{lang-fr|Mer de Beaufort}}) is a marginal sea of the Arctic Ocean,[4] located north of the Northwest Territories, the Yukon, and Alaska, and west of Canada's Arctic islands. The sea is named after Sir Francis Beaufort, a hydrographer. The Mackenzie River, the longest in Canada, empties into the Canadian part of the Beaufort Sea west of Tuktoyaktuk, which is one of the few permanent settlements on the sea shores. The sea, characterized by severe climate, is frozen over most of the year. Historically, only a narrow pass up to {{convert|100|km|abbr=on}} opened in August–September near its shores, but recently due to climate change in the Arctic the ice-free area in late summer has greatly enlarged. Claims that the seacoast was populated about 30,000 years ago have been largely discredited (see below); present population density is very low. The sea contains significant resources of petroleum and natural gas under its shelf, such as the Amauligak field. They were discovered in the period between the 1950s and 1980s, and their exploration became the major human activity in the area since the 1980s. The traditional occupations of fishery and whale and seal hunting are practiced only locally, and have no commercial significance. As a result, the sea hosts one of the largest colonies of beluga whales, and there is no sign of overfishing. To prevent overfishing in its waters, the US adopted precautionary commercial fisheries management plan in August 2009.[5] In April 2011 the Canadian government signed a memorandum of understanding with the Inuvialuit as a first step in developing a larger ocean management plan.[6] The Canadian government announced in October 2014 that no new commercial fisheries in the Beaufort Sea will be considered until research has shown sustainable stocks that would be made available to Inuvialuit first.[7] The Canadian government has set a new block of the Beaufort Sea off the Parry Peninsula in the Amundsen as a Marine Protected Area (MPA).[8] The protected area is set to protect species and habits for the Inuvialuit community. ExtentThe International Hydrographic Organization defines the limits of the Beaufort Sea as follows:[9]
Border dispute{{See also|Territorial claims in the Arctic#Beaufort Sea}}There is an unresolved dispute involving a wedge-shaped slice on the International Boundary in the Beaufort Sea, between the Canadian territory of Yukon and the U.S. state of Alaska. Canada claims the maritime boundary to be along the 141st meridian west out to a distance of {{convert|200|nmi|abbr=on|lk=in}}, following the Alaska–Yukon land border.[10][11] The position of the United States is that the boundary line is perpendicular to the coast out to a distance of {{convert|200|nmi|abbr=on}}, following a line of equidistance from the coast.[11][12] This difference creates a wedge with an area of about {{convert|21000|km2|abbr=on}} that is claimed by both nations.[14] Canada's position has its roots in the Treaty of Saint Petersburg (1825) between the United Kingdom and the Russian Empire that set the boundary between the two. Canada is the successor state to Great Britain in relation to this treaty, which stipulates:[11] {{quote|text=the line of demarcation shall follow the summit of the mountains situated parallel to the Coast, as far as the point of intersection of the 141st degree of West longitude […] and, finally, from the said point of intersection, the said Meridian Line of the 141st degree, in its prolongation as far as the Frozen Ocean|sign=Article 3, Convention between Great Britain and Russia concerning the Limits of their Respective Possessions on the North-West Coast of America and the Navigation of the Pacific Ocean, 1825-02-16, 75 CTS 95[11]}}Canada maintains that this treaty is extensible from the land into the Beaufort Sea along the meridian. The United States rejects this extension and instead asserts a boundary line based upon equidistance, although its position is somewhat undermined by its acceptance in 1867 of similar treaty wording and a similar interpretation under the treaty whereby it acquired Alaska.[11] Both the U.S. and Canada agree that they are bound by the 1958 Convention on the Continental Shelf; and they both agree that the boundary should be "equitable", as determined by the International Court of Justice. They differ on what should be deemed "equitable". The U.S. contends that "equidistance is an appropriate principle for determining a maritime boundary where there are no special circumstances in the area and when equidistance results in a boundary in accordance with equitable principles". Canada contends that an equidistance principle does not result in an equitable boundary, because distortion would occur. The coast of Yukon is concave, whereas the coast of Alaska is convex; and thus an equidistance principle would result in a significant extension of the U.S. possession.[13] This dispute has taken on increased significance due to the possible presence of natural reserves within the wedge,[11][14][15] which according to Canada's National Energy Board may contain {{convert|1700000000|m3|abbr=on}} of gas, which would cover the national consumption for 20 years, and more than {{convert|1000000000|m3|abbr=on}} of oil.[16] Because of this, Canada argues that "special circumstances" apply to this border, a position that the U.S. rejects.[13] This dispute is in this respect a mirror image of the dispute between the U.S. and Canada over the Gulf of Maine, where the U.S. argued for "special circumstances" and Canada argued for the equidistance principle.[13] (It is to be noted that in that latter dispute, both of those arguments were rejected, and the border was drawn based upon geometric principles taking into account geographic factors.[13]) Neither the U.S. nor Canada has pressed for a swift resolution for the matter, or arbitration at the International Court of Justice, however;[11] and the two have in the meantime cooperated in several measures aimed at preserving the maritime environment.[11][13] Before the end of 2004, the US leased eight plots of land below the water for oil exploration and exploitation, provoking a diplomatic protest from Canada.[17] On 20 August 2009, United States Secretary of Commerce Gary Locke announced a moratorium on commercial fishing of the Beaufort Sea north of Alaska, including the disputed waters.[18][19] In July 2010, US–Canada negotiations have started in Ottawa with the next meeting planned in 2011.{{Update inline|date=April 2014}} A joint geological survey of the area has been initiated, and the issue was marked as settled by the CIA World Factbook,[20] though no official document has been released by September 2010. GeographySeveral rivers such as the Kongakut River in Alaska and the Firth River in Yukon empty into the Beaufort. The major river to flow into the sea is the Mackenzie, Canada's longest, which empties into the Canadian part of the sea, west of Tuktoyaktuk. The coastal shelf area is rather narrow, especially near and east of Point Barrow in the Alaskan part of the sea, and contains numerous submarine valleys. It becomes wider near the delta of the Mackenzie River but nowhere exceeds {{convert|145|km|abbr=on}}. Near the coast, the depths are shallower than {{convert|60|m|abbr=on}} but they rapidly increase northwards up to a few kilometers, transforming into a massive platform which is geologically similar to that of the oceans. There are many small islands in the sea and in the delta of the Mackenzie River. A few larger ones lie west of the Mackenzie River, such as Herschel Island ({{convert|4|km|abbr=on}} off the shore, area {{convert|18|km2|abbr=on}}) and Barter Island ({{convert|0.3|km|abbr=on}} from the coast, area {{convert|13|km2|abbr=on}}). The coasts are low, with the maximum elevations between {{convert|250|and|750|m|abbr=on}}.[3] The soil is frozen all year around at the depth below about {{convert|1|m|abbr=on}} or less, forming permafrost, and only top few tens of centimeters thaws in summer. Consequently, buildings have to be elevated above ground on wooden piles that are immersed into the permafrost.[34] Hydrology and climateThe Beaufort Sea is frozen over through the year, except for August and September when the ice breaks near the coast and opens what was once a {{convert|50|–|100|km|abbr=on}} wide strip of open water.[2] During the 2000s, due to climate change in the Arctic, the ice-free area in late summer greatly enlarged. During the record minimum extent of Arctic sea ice in September, 2012, the sea ice boundary had retreated northward much farther than normal from the coast.[21][22][23][24] The channels of the Mackenzie River thaw earlier, in late May–early June. This thawing increases the average water discharge from about {{convert|150000|to|250000|m3/s|abbr=on}}.[25] Hidden changes in the ice cover of the Beaufort Sea were discovered in 2009. Whereas the ice area remain stable, as detected by the observation satellites, so as the associated water temperature and salinity, the ice structure has changed recently. The new ice, called rotten ice, is thinner and much weaker structurally.[26] The sea water has a stable temperature and is separated into four distinct layers as follows. The top {{convert|100|m|abbr=on}} are surface water which has a temperature of {{convert|-1.4|C|1}} in summer and {{convert|-1.8|C|1}} in winter. The next layer is formed by the inflows from the Pacific Ocean and Bering Sea coming through the Bering Strait; it extends up to the North Pole. The warmest, deep Atlantic layer has the temperatures between 0 and 1 °C (32 to 34 °F), and water at the bottom is a bit colder at −0.4 to −0.8 °C (31.3 to 30.6 °F).[3] The average salinity varies between 28‰ and 32‰ (parts per thousand) from south to north.[2] Typical air temperatures (at Tuktoyaktuk) are {{convert|-27|C}} in January and {{convert|11|C}} in July.[27] The water currents form the clockwise-directed Beaufort Gyre, that results in south-westerly and westerly currents near the shores.[28] The Mackenzie River partly affects this circulation inducing minor eastwards streams near its mouth. The river annually brings about 15 million tonnes of sediments which are rich in dolomite and calcium carbonate. Those deposits are spread over the sea and mixed with mud and gravel.[3] Flora and faunaThe shoreline of the Beaufort Sea is covered with tundra and the northern limit of the terrestrial range{{Citation needed|date=October 2010}} of the polar bear in North America. The Mackenzie River is an important habitat for whales and seabirds and is still relatively untouched by commercial traffic.[29] The delta of Mackenzie River contains numerous lakes and ponds which are inhabited by muskrat.[25] The sea hosts about 80 species of zooplankton, more than 70 species of phytoplankton, and nearly 700 species of polychaetes, bryozoans, crustaceans and mollusks, but their total volume is relatively small owing to the cold climate.[3][30] Major fish species include polar cod (Boreogadus saida), Arctic cod (Arctogadus glacialis), saffron cod (Eleginus gracilis), Arctic char (Salvelinus alpinus), chum salmon (Oncorhynchus keta), Arctic cisco (Coregonus autumnalis), least cisco (Coregonus sardinella), lake whitefish (Coregonus clupeaformis), broad whitefish (Coregonus nasus), Pacific herring (Clupea pallasii), fourhorn sculpin (Myoxocephalus quadricornis), inconnu (Stenodus leucichthys) and flatfish.[31] The eastern part of the sea is a major habitat of beluga whales with an estimated population of 39,000.{{Citation needed|date=April 2015}} This population is stable and might even be increasing; it is not affected by the offshore oil exploration in the area.{{Citation needed|date=April 2015}} Belugas spend summer in the coastal area and Mackenzie River delta, which are free of ice then, and in winter migrate log distances to the polynyas of the deep sea.{{Citation needed|date=April 2015}} Genetic analyses have confirmed that belugas of the Beaufort Sea are clearly distinct from those of other Canadian and Alaskan waters, despite they often share a common wintering habitat.[32] The food chain of the Beaufort Sea is relatively simple: It starts with phytoplankton and epontic algae (single-cell algae associated with the lower interface of sea ice[33]), which provide energy to zooplankton, and epontic and coastal amphipods. The latter serve as a food for seabirds and fish, primarily as polar cod and Arctic char. Polar cod is a major food of Arctic char, beluga, narwhal, seabirds and seals, which are dominated by the bearded seal (Erignatus barbatus) and ringed seal (Pusa hispida). Bearded seal and walrus also feed on benthic invertebrates. On top of the food pyramid stands polar bear, which feeds primarily on seals, but also on any large marine mammals when it has a chance, such as carcasses and whales trapped in ice fields.[34] Human activities"There is only one proposed Early-Entry site in eastern Beringia that still has proponents, Bluefish Caves in the Porcupine River Basin, Yukon Territory, Canada. Claims of great antiquity in the area [e.g., 30kya] have a convoluted history. A caribou tibia flesher, the most diagnostic human implement from the Old Crow basin, had been dated at near 28 kya. When redated using accelerator mass spectrometry (AMS) of small amounts of remnant collagen the bone produced a 1.8 kya date (Yesner 1996b:255)".[35] There is no evidence for anomalous occupation of Beaufort coasts in the context of Arctic cultures generally, including the arrival about 4,000 years ago by Paleo-Eskimos such as the Dorset culture, around 1,000 years ago by the Thule and finally by the modern Inuit. From early ages, they practised fishing – bones of Arctic char were found at the 4,000 years old settlements. While originally they lived nomadic life, later, they started to form permanent settlements. Modern Inuit are mostly concentrated near the Mackenzie River delta. Their population is increasing, but the unemployment rate is relatively high.[34] Bowhead whales were hunted in the sea between 1888 and 1914. This practice stopped, first because of the decline in whale population and then because of government regulations, but resumed in the 1990s.[36] The major settlements along the Beaufort Sea are Tuktoyaktuk (population 930 in 2009[37]) in Canada and Prudhoe Bay, Alaska. Although Prudhoe Bay is permanently populated by only a few people, there are thousands of contract workers in the area employed on petroleum production at the Prudhoe Bay Oil Field, which is on the coastal lowland known as the North Slope. Artificial islands, such as Endicott and Northstar, have been raised near the shores in 1987 and 2001, respectively. The crude oil is transported through the Trans-Alaska Pipeline System to the southern port of Valdez.[3] Fishing and sea hunting are practised by the local inhabitants and have no commercial value, especially after a US moratorium on commercial fishing of the Beaufort Sea, adopted in 2009.[3] Trapping of muskrat at the Mackenzie River delta was the main source of income for the Athabaskan First Nations peoples and Inuit during 1920–1960, but has since declined.[25] Oil and gas explorationThe Beaufort Sea contains major gas and petroleum reserves beneath the seabed, a continuation of proven reserves in the nearby Mackenzie River and North Slope.[17] The Beaufort Sea was first explored for sub-shelf hydrocarbons in the 1950s and estimated to contain about {{convert|250|km3|abbr=on}} of oil and {{convert|300000|km3|abbr=on}} of natural gas under its coastal shelf. Offshore drilling began in 1972; about 70 wells were set up by the 1980s[63] and 200 wells by 2000.[38] These activities resulted in dredging of about 46.5 million m3 of sea bottom soil, as well as discharge of drilling muds which contained barite, clay, caustic soda, and heavy metals zinc, copper, lead, chromium, cobalt, nickel, cadmium and mercury. About {{convert|50400|m3|abbr=on}} of oil was produced in 1986.[39] A major gas field, named Taglu Gas Field, was discovered in the Mackenzie River delta in 1971,[40] followed by the Parson Lake field and Niglintgak field. The estimated gas reserves of these fields are {{convert|58600|km3|abbr=on}}, {{convert|35400|km3|abbr=on}} and {{convert|13600|km3|abbr=on}}, respectively. Moreover, further into the sea from the Mackenzie delta lies the Amauligak field. This, the largest known oil deposit of the Beaufort Sea, was discovered in 1984, and is estimated to contain {{convert|37.3|km3|abbr=on}} of oil and {{convert|38500|km3|abbr=on}} of gas. The development of these fields is hindered by their remote location. This problem was alleviated for Prudhoe Bay by constructing the Trans-Alaska Pipeline, but is limiting regular commercial production at Mackenzie River deposits.[38] For example, the Amauligak Project was started soon after the discovery of the field. In September 1985, the tanker Gulf Beaufort has transported {{convert|50300000|l|oilbbl|abbr=on|0}} of crude oil to Japan, which was the first shipment of oil from the Arctic deposits.[41] However, the project has stalled after that. In July 2017, the U.S. Bureau of Ocean Energy Management approved a plan to allow Eni, an Italian multinational oil and gas company, to drill four oil exploration wells on Spy Island, one of four artificial islands in the Beaufort Sea.[42] In popular cultureStan Rogers references the Beaufort Sea in his popular Canadian Folk Song Northwest Passage (song). See also{{portal|Arctic}}
References1. ^R. Stein, Arctic Ocean Sediments: Processes, Proxies, and Paleoenvironment, p. 37 2. ^1 2 Beaufort Sea, Great Soviet Encyclopedia (in Russian) 3. ^1 2 3 4 5 6 Beaufort Sea, Encyclopædia Britannica on-line 4. ^{{cite book|author=John Wright|title=The New York Times Almanac 2002|url=https://books.google.com/books?id=G81HonU81pAC&pg=PA459|accessdate=29 November 2010|date=30 November 2001|publisher=Psychology Press|isbn=978-1-57958-348-4|page=459}} 5. ^Arctic Fishery Management Plan. 6. ^Beaufort Sea Commercial Fishing Banned (CBC News 15 April 2011). 7. ^No new fisheries in the Arctic following federal ban 8. ^{{Cite news|url=http://www.huffingtonpost.com/entry/canada-arctic-marine-protection_us_5840a87ae4b0c68e048002da|title=Canada Designates Its Second And Largest Arctic Marine Protected Area|last=|first=|date=|work=|access-date=|via=}} 9. ^{{cite web|url=http://www.iho.int/iho_pubs/standard/S-23/S-23_Ed3_1953_EN.pdf |title=Limits of Oceans and Seas, 3rd edition |year=1953 |publisher=International Hydrographic Organization |accessdate=6 February 2010 }} 10. ^The Law of the Sea Convention (BP-322E) {{webarchive|url=https://web.archive.org/web/20070228155006/http://dsp-psd.communication.gc.ca/Collection-R/LoPBdP/BP/bp322-e.htm |date=28 February 2007 }}. Dsp-psd.communication.gc.ca. Retrieved on 2013-03-21. 11. ^1 2 3 4 5 6 7 {{cite book|title=The Polar Regions and the Development of International Law|volume=3|series=Cambridge studies in international and comparative law|author=Donald Rothwell|publisher=Cambridge University Press|year=1996|isbn=978-0-521-56182-2|pages=174, 176}} 12. ^Summary of claims, Department of Defense, p. 10 13. ^1 2 3 4 {{cite book|title=Ocean Boundary Making: Regional Issues and Developments|author1=Douglas M. Johnston |author2=Phillip M. Saunders |lastauthoramp=yes |publisher=Taylor & Francis|year=1988|isbn=978-0-7099-1495-2|pages=48–49}} 14. ^Northern interests and Canadian foreign policy {{webarchive|url=https://web.archive.org/web/20100816063443/http://www.cdfai.org/PDF/Northern%20Interests%20and%20Canadian%20Foreign%20Policy.pdf |date=16 August 2010 }}, Associate Director Centre for Military and Strategic Studies, University of Calgary 15. ^[https://web.archive.org/web/20090306044528/http://www.dog.dnr.state.ak.us/oil/products/publications/beaufortsea/bsaw2006/bsmap8.pdf Beaufort Sea Areawide 2006, Tract Map No.8], State of Alaska Department of Natural Resources, Division of oil and gas 16. ^1 [https://www.bbc.co.uk/news/world-us-canada-10834006 US-Canada Arctic border dispute key to maritime riches], BBC News, 2 August 2010 17. ^1 [https://web.archive.org/web/20070224150112/http://www.institutenorth.org/servlet/download?id=35 Sea Changes], Institute of the North 18. ^{{cite news|url=http://www.worldfishing.net/news/news_story.ehtml?o=3212|title=Secretary of Commerce approves fisheries plan for ArcticSecretary of Commerce approves fisheries plan for Arctic|date=20 August 2009|publisher=World of fishing |archiveurl=https://www.webcitation.org/query?url=http%3A%2F%2Fwww.worldfishing.net%2Fnews%2Fnews_story.ehtml%3Fo%3D3212&date=2009-09-15|archivedate=15 September 2009}} 19. ^{{cite news|url=http://www.canada.com/Canada+protests+Arctic+fishing/1962264/story.html|title=Canada protests U.S. Arctic fishing ban|date=4 September 2009 |author=Randy Boswell|publisher=Canada.com|archiveurl=https://www.webcitation.org/query?url=http%3A%2F%2Fwww.canada.com%2FCanada%2Bprotests%2BArctic%2Bfishing%2F1962264%2Fstory.html&date=2009-09-15|archivedate=15 September 2009}} 20. ^[https://www.cia.gov/library/publications/the-world-factbook/fields/print_2070.html Disputes – international: CIA – The World Factbook]. Cia.gov. Retrieved on 2013-03-21. 21. ^{{cite web |url=http://nsidc.org/arcticseaicenews/2012/10/poles-apart-a-record-breaking-summer-and-winter/ |title=Poles apart: A record-breaking summer and winter |date=2 October 2012 |publisher=National Snow and Ice Data Center |archivedate=4 February 2013 |archiveurl=https://www.webcitation.org/6EBsCKQgB?url=http://nsidc.org/arcticseaicenews/2012/10/poles-apart-a-record-breaking-summer-and-winter/ |quote=Arctic sea ice extent averaged for September 2012 was 3.61 million square kilometers (1.39 million square miles). This was 3.43 million square kilometers (1.32 million square miles) below the 1979 to 2000 average extent. September 2012 ice extent was 690,000 square kilometers (266,000 square miles) less than the previous record low for the month that occurred in 2007. |deadurl=yes |df=dmy }} 22. ^{{cite web |url=http://www.alaskadispatch.com/article/rotting-whale-meat-lures-record-80-polar-bears-kaktovik |title=Rotting whale meat lures record 80 polar bears to Kaktovik |first=Ben |last=Anderson |date=23 September 2012 |archivedate=4 February 2013 |archiveurl=https://www.webcitation.org/6EBsK2Bbv?url=http://www.alaskadispatch.com/article/rotting-whale-meat-lures-record-80-polar-bears-kaktovik |publisher=Alaska Dispatch |quote=While the whale carcass is one reason for the polar bear bonanza, scientists wonder if there isn’t another reason. Namely, the record retreat of Arctic sea ice from the northeast coast of Alaska into the Beaufort Sea. |deadurl=yes |df=dmy }} 23. ^{{cite web |url=http://pubs.usgs.gov/fs/2008/3041/ |title=Pacific Walrus Response to Arctic Sea Ice Losses |first1=By Chadwick V. |last1=Jay |first2=Anthony S. |last2=Fischbach |date=9 January 2013 |publisher=United States Geological Survey |archivedate=4 February 2013 |archiveurl=https://www.webcitation.org/6EBsWnbu3?url=http://pubs.usgs.gov/fs/2008/3041/ |quote=The extent of Arctic summer sea ice has decreased sharply over the past several decades (Stroeve and others, 2007). |deadurl=yes |df=dmy }} 24. ^{{cite web |url=http://www.nasa.gov/topics/earth/features/2012-seaicemin.html |title=Arctic Sea Ice Hits Smallest Extent In Satellite Era |date=19 September 2012 |publisher=National Aeronautics and Space Administration |archivedate=4 February 2013 |archiveurl=https://www.webcitation.org/6EBvzGbxv?url=http://www.nasa.gov/topics/earth/features/2012-seaicemin.html |quote=The new record minimum measures almost 300,000 square miles less than the previous lowest extent in the satellite record, set in mid-September 2007, of 1.61 million square miles (4.17 million square kilometers). For comparison, the state of Texas measures around 268,600 square miles. |deadurl=yes |df=dmy }} 25. ^1 2 3 Mackenzie River, Encyclopædia Britannica on-line 26. ^[https://www.sciencedaily.com/releases/2010/01/100121164011.htm Ice Is 'Rotten' in the Beaufort Sea], ScienceDaily, 23 January 2010 27. ^Canadian Climate Normals 1971–2000. climate.weatheroffice.gc.ca 28. ^Parsons, pp. 213–214 29. ^C. Michael Hogan (2008) Polar Bear: Ursus maritimus, Globaltwitcher.com, ed. N. Stromberg {{webarchive |url=https://web.archive.org/web/20081224205716/http://globaltwitcher.auderis.se/artspec_information.asp?thingid=36084 |date=24 December 2008 }} 30. ^Parsons, pp. 214–215 31. ^Parsons, pp. 218, 221 32. ^COSEWIC Assessment and Update Status Report on the Beluga Whale. Dsp-psd.pwgsc.gc.ca (31 July 2012). Retrieved on 2013-03-21. 33. ^{{cite journal|last1=Cota|first1=Glenn F.|title=Photoadaptation of high Arctic ice algae|journal=Nature|volume=315|issue=6016|page=219|year=1985|doi=10.1038/315219a0|bibcode = 1985Natur.315..219C }} 34. ^1 Parsons, pp. 215–217 35. ^http://www.jqjacobs.net/anthro/paleoamericans.html 36. ^Parsons, p. 222 37. ^[https://web.archive.org/web/20110722011401/http://www.stats.gov.nt.ca/community-data/community-profiles/Profile%20PDF/Tuktoyaktuk.pdf Tuktoyaktuk – Statistical Profile]. stats.gov.nt.ca 38. ^1 Marlan W. Downey, William Andrew Morgan, Jack C. Threet, American Association of Petroleum Geologists [https://books.google.com/books?id=i9jts14tq1gC&pg=PA125 Petroleum provinces of the twenty-first century], AAPG, 2001 {{ISBN|0-89181-355-1}}, p. 125 39. ^1 Parsons, p. 233 40. ^{{cite book|last1=Hawkings|first1=T.J.|last2=Hatfield|first2=W.G.|last3=Bowerman|first3=J.N.|last4=Coffman|first4=R.C.|editor1-last=Braunstein|editor1-first=Jules|title=Taglu Gas Field, Beaufort Basin, Northwest Territories, in North American Oil and Gas Fields|date=1976|publisher=The American Association of Petroleum Geologists|location=Tulsa|isbn=0891813004|pages=51–71}} 41. ^David L. VanderZwaag, Cynthia Lamson [https://books.google.com/books?id=FbazRimOybEC&pg=PA61 The Challenge of arctic shipping: science, environmental assessment, and human values], McGill-Queen's Press – MQUP, 1990 {{ISBN|0-7735-0700-0}}, p. 61 42. ^{{cite news|title=US approves oil drilling in Alaska waters, prompting fears for marine life|url=https://www.theguardian.com/us-news/2017/jul/13/us-approves-oil-drilling-in-alaska-waters-marine-life-fear|accessdate=1 January 2018|work=The Guardian|agency=Associated Press|date=13 July 2017}} Bibliography
Further reading
External links
12 : Beaufort Sea|Canada–United States border disputes|Disputed waters|Geography of the Inuvialuit Settlement Region|Bodies of water of North Slope Borough, Alaska|Seas of the Arctic Ocean|Seas of the United States|Bodies of water of Alaska|Arctic Watershed of North America|Bodies of water of Yukon|Bodies of water of the Northwest Territories|Seas of Canada |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。