Chukchi Sea
The Chukchi Sea stretches between Point Barrow in Alaska and Wrangel Island off the Siberian coast. Its southern edge meets the Bering Strait, which links it to the Pacific Ocean. In 1928, Norwegian polar explorer Harald Sverdrup observed that this body of water differed significantly from the East Siberian Sea. He noted distinct hydrographic features separating the two regions. This observation led to a decision to name the sea after the Chukchi people who live on its shores. The name received official approval in 1935. The International Date Line cuts diagonally across the region but shifts eastward to avoid Wrangel Island and the Chukotka Autonomous Okrug. Only about four months each year allow navigation through these waters. Roughly 56% of the total area lies at depths under 40 meters. The Hope Basin dominates the geological structure of the seabed.
Bowhead whales travel through the Chukchi Corridor as part of one of the largest marine mammal migrations globally. Satellite tracking data from 2006 to 2012 documented their movement patterns within this corridor. Beluga whales also migrate through these waters during summer and early autumn seasons. Pacific walrus populations rely on the shallow continental shelf for feeding grounds. Bearded seals inhabit the same region alongside other species. Polar bears living on the pack ice here represent one of five genetically distinct Eurasian populations. Coastal communities have traditionally hunted walrus, fish, and whales in this cold environment. The U.S. Coast Guard identified a large mass of organic material floating off northwest Alaska in July 2009. This discovery marked an unusual event in the ecosystem's history.
Semyon Dezhnyov sailed from the Kolyma River to the Anadyr River in 1648 but his route remained unused for two centuries. Vitus Bering entered the sea in 1728 while Captain James Cook followed in 1779. Adolf Erik Nordenskiöld's steamship Vega became trapped in fast ice on the 28th of September 1878. Crew members spent winter quarters just miles from open water before escaping the following year. The Karluk disaster unfolded when expedition leader Vilhjalmur Stefansson abandoned ship in 1913. Ice crushed the vessel near Herald Island after it drifted along northern expanses. Captain Robert Bartlett walked hundreds of kilometers with Kataktovik to reach Cape Vankarem by the 15th of April 1914. Twelve survivors waited nine months on Wrangel Island until rescued by the King & Winge schooner. The steamer Chelyuskin sank on the 13th of February 1934 after drifting over two months in heavy ice. Soviet authorities organized an aerial evacuation that saved all but one crew member. Vladimir Voronin and Otto Schmidt emerged as heroes of this operation.
Scientists from the Cold Regions Research and Engineering Laboratory published findings in 2012 about the largest known oceanic phytoplankton bloom. This discovery challenged previous beliefs that plankton grows only after seasonal ice melt. Some algae were found under several meters of intact sea ice. Two cyst beds of dinoflagellate Alexandrium catenella exist within Ledyard Bay and Barrow Canyon. These dormant cysts can germinate if environmental conditions become favorable. Active blooms produce saxitoxin, a neurotoxin causing paralytic shellfish poisoning when consumed. The total area of these cyst beds covers 145,600 square kilometers, comparable to Iowa's size. Concentration levels rank among the highest globally. Germination occurs only in upper millimeters where oxygen exists. At bottom water temperatures around 3 degrees Celsius, cysts take approximately 28 days to activate. Warmer summer waters at 8 degrees reduce this time to just 10 days. In situ blooms appeared during July and August months in 2018 and 2019. Climate change has advanced bloom initiation by three weeks over the last two decades.
The Chukchi shelf holds oil and gas reserves estimated at significant volumes. On the 6th of February 2008, the U.S. government announced successful bidders would pay $2.6 billion for extraction rights. Environmentalists criticized the auction heavily. The Obama administration granted conditional approval for Shell Oil to drill in shallow waters in May 2015. Shell announced its withdrawal from regional exploration efforts in September 2015 due to high costs and declining prices. The corporation eventually surrendered all but one Arctic lease despite initial vows to return. Russian scientists opened a floating polar research station named Severny Polyus-38 on the 15th of October 2010. Fifteen researchers lived there for a year conducting studies to support territorial claims. A Russian expedition located the wreck of the Chelyuskin ship in mid-September 2006. Two small superstructure components were recovered and sent to Burmeister & Wain of Copenhagen for identification.
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Common questions
What is the Chukchi Sea and where is it located?
The Chukchi Sea is a marginal sea of the Arctic Ocean situated north of the Bering Strait. It stretches between Point Barrow in Alaska and Wrangel Island off the Siberian coast.
Who gave the Chukchi Sea its name and when was it officially approved?
Norwegian polar explorer Harald Sverdrup observed distinct hydrographic features that led to naming the sea after the Chukchi people who live on its shores. The name received official approval in 1935.
Which marine mammals migrate through the Chukchi Corridor?
Bowhead whales travel through the Chukchi Corridor as part of one of the largest marine mammal migrations globally. Beluga whales also migrate through these waters during summer and early autumn seasons alongside Pacific walrus populations and bearded seals.
When did Adolf Erik Nordenskiöld's steamship Vega get trapped in ice?
Adolf Erik Nordenskiöld's steamship Vega became trapped in fast ice on the 28th of September 1878. Crew members spent winter quarters just miles from open water before escaping the following year.
What are the characteristics of phytoplankton blooms in Ledyard Bay and Barrow Canyon?
Two cyst beds of dinoflagellate Alexandrium catenella exist within Ledyard Bay and Barrow Canyon covering a total area of 145,600 square kilometers. These dormant cysts can germinate if environmental conditions become favorable and produce saxitoxin when active.
How much money did bidders pay for oil extraction rights in the Chukchi Sea in 2008?
On the 6th of February 2008, the U.S. government announced successful bidders would pay $2.6 billion for extraction rights. The Obama administration granted conditional approval for Shell Oil to drill in shallow waters in May 2015 before the corporation withdrew its efforts in September 2015.