Laptev Sea

• 1. Boundaries Of The Frozen Sea

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  The International Hydrographic Organization drew a precise line on the map in 1935 to define the limits of this Arctic body. That boundary starts at Arctic Cape on Komsomolets Island and extends northward to connect with Cape Rosa Luxemburg. It then crosses Red Army Strait to reach Cape Vorochilov on October Revolution Island before moving through that island to Cape Anuchin. The border continues across Shokalsky Strait to Cape Unslicht on Bolshevik Island, then proceeds through the island to Cape Yevgenov. From there, the line goes through Vilkitsky Strait to Cape Pronchishchev on the Taymyr Peninsula. The southern edge follows the shore of the Asian mainland, encompassing features like the Khatanga Gulf and the massive delta of the Lena River. In the east, the polygon crosses the Dmitry Laptev Strait to link Cape Svyatoy Nos with Cape Vagin on Bolshoy Lyakhovsky Island. The final segment runs through Kotelny Island to Cape Anisy, its northernmost headland, before returning to Arctic Cape. This definition creates an area of approximately 502,000 square kilometers.

• 2. Nine Months Of Darkness And Ice

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  Air temperatures stay below zero degrees Celsius for nine months each year along the southern coast and eleven months in the north. January brings average temperatures ranging from minus thirty-five to minus forty-two degrees Celsius, with a recorded minimum of minus fifty-eight degrees Celsius at Tiksi. July offers only slight relief, rising to zero degrees Celsius in the north and five degrees Celsius in the south, though coastal areas can reach twenty-four degrees Celsius during August heatwaves. Polar night lasts three months on the southern shores and five months further north, while midnight sun provides continuous daylight for similar durations. Strong winds blow from the south and southwest in winter at eight meters per second, subsiding toward spring. Summer sees winds shift direction to northerly speeds of three to four meters per second. These weak winds result in low convection within surface waters, occurring only to depths of five to ten meters. Ice formation typically begins in September on the north and October on the south, though human-driven climate change has progressively delayed this start date. In 2020, record-breaking heat meant ice formation did not begin until late October, marking the latest start ever recorded. The resulting ice sheet reaches thicknesses up to two meters in the southeastern part near the coast.

• 3. Rivers That Dilute The Salts

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  The sea receives about 730 cubic kilometers of freshwater runoff annually, which would form a layer one hundred thirty-five centimeters deep over the entire surface. This volume makes it the second largest river discharge system in the world after the Kara Sea. Approximately seventy percent or 515 cubic kilometers comes solely from the Lena River, with other major contributions including Khatanga exceeding 100 cubic kilometers, Olenyok at 35 cubic kilometers, Yana greater than 30 cubic kilometers, and Anabar at 20 cubic kilometers. About ninety percent of this annual runoff occurs between June and September, with thirty-five to forty percent arriving in August alone. Water salinity varies significantly from twenty to twenty-five parts per thousand in the southeast during winter to thirty-four parts per thousand in northern areas. Summer sees values drop to five to ten parts per thousand and thirty to thirty-two parts per thousand respectively. The medium water layer remains warmer at up to 1.5 degrees Celsius because it is fed by warm Atlantic waters that take 2.5 to 3 years to travel from Spitsbergen. Deeper layers stay colder at approximately minus 0.8 degrees Celsius. Surface layers in ice-free zones warm to eight to ten degrees Celsius in bays and two to three degrees Celsius in open sea.

• 4. Explorers Who Vanished In The North

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  Russian explorations began in the 17th century as Cossacks traveled down rivers emptying into the sea. In 1629, Siberian Cossacks reached the Lena River delta and left a note stating the river flows into a sea. By 1712, Yakov Permyakov and Merkury Vagin explored the eastern part of the Laptev Sea and discovered Bolshoy Lyakhovsky Island before being killed on their return journey by mutineering team members. In 1735, Vasili Pronchishchev sailed from Yakutsk down the Lena River on his sloop Yakutsk. He wintered at the mouth of the Olenyok River where many crew members fell ill and died from scurvy. Despite these difficulties, he reached the eastern shore of the Taymyr Peninsula in 1736. Both Pronchishchev and his wife Maria succumbed to scurvy on the way back. During the Great Northern Expedition between 1739 and 1742, cousins Dmitry Laptev and Khariton Laptev described the coastline from the Lena River mouth along Buor-Khaya and Yana gulfs. Detailed mapping continued with Pyotr Anjou traveling some 800 kilometers over the region on sledges and small boats between 1821 and 1823. Adolf Erik Nordenskiöld became the first person to travel across the whole sea on a steamship named Vega in 1875. Baron Eduard von Toll disappeared off the New Siberian Islands under mysterious circumstances during his final expedition between 1900 and 1902.

• 5. Life Among The Ice And Mud

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  Vegetation consists mostly of diatoms with more than 100 species, while green algae, blue-green algae, and flagellate species number about 10 each. Coastal flora includes mosses, lichens, and flowering plants like Arctic poppy, Saxifraga, Draba, and small populations of polar willow. Permanent mammal species include ringed seal, bearded seal, harp seal, walrus, collared lemming, Arctic fox, reindeer, wolf, ermine, Arctic hare, and polar bear. Beluga whales visit the region seasonally. Several dozen bird species make large colonies on islands and shores, including snow bunting, purple sandpiper, snowy owl, brent goose, little auk, black-legged kittiwake, black guillemot, ivory gull, and glaucous gull. There are 39 fish species, mostly typical of brackish environments such as grayling, Coregonus whitefishes, muksun, broad whitefish, omul, sardine, Arctic cisco, Bering cisco, polar smelt, saffron cod, polar cod, flounder, Arctic char, and inconnu. In 1985, the Ust-Lena Nature Reserve was established covering 14,300 square kilometers to protect these ecosystems.

• 6. Settlements And The Northern Route

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  Coastal settlements remain few and small with typical populations of a few hundred or less. Tiksi stands as the only exception with a population of 5,873 people serving as the administrative center of Bulunsky District. During Soviet times, limited shipping booms occurred due to icebreaker convoys plying the Northern Sea Route. The route proved difficult even for icebreakers; the ship Lenin and her convoy of five ships were trapped in ice around September 1937. They spent an enforced winter there before being rescued by another icebreaker named Krasin in August 1938. Major transported goods included timber, fur, and construction materials. Nordvik harbor further west became a growing town but closed in the mid-1940s. After the break-up of the Soviet Union, commercial navigation declined sharply in the 1990s. More regular shipping exists only from Murmansk to Dudinka in the west and between Vladivostok and Pevek in the east. Ports between Dudinka and Pevek see next to no shipping at all. Logashkino was abandoned in 1998 and is now a ghost town.