Question: Which Russian ruler and naval commander also took part in polar expeditions to study the Arctic Circle?

full_context: Document 1: Jackson–Harmsworth expedition: The Jackson–Harmsworth expedition to Franz Josef Land, 1894–97, was led by British Arctic explorer Frederick George Jackson and financed by newspaper proprietor Alfred Harmsworth. Jackson had been misled by false maps into believing that Franz Joseph Land was a land mass that extended to the North Pole. The survey which was the main work of the expedition eventually proved that the land was in fact an archipelago, whose northernmost island stretched no further than 81°N.
Document 2: Arctic exploration: Arctic exploration is the physical exploration of the Arctic region of the Earth. It refers to the historical period during which mankind has explored the region north of the Arctic Circle. Historical records suggest that humankind have explored the northern extremes since 325 BC, when the ancient Greek sailor Pytheas reached a frozen sea while attempting to find a source of the metal tin. Dangerous oceans and poor weather conditions often fetter explorers attempting to reach polar regions and journeying through these perils by sight, boat, and foot has proven difficult.
Document 3: List of Russian explorers: The history of exploration by citizens or subjects of the Russian Federation, the Soviet Union, the Russian Empire, the Tsardom of Russia and other Russian predecessor states forms a significant part of the history of Russia as well as the history of the world. At 17075400 km2 , Russia is the largest country in the world, covering more than a ninth of the Earth’s land mass. In the times of the Soviet Union and the Russian Empire the country's share in the world's land mass reached 1/6. Most of these territories were first discovered by Russian explorers (if indigenous peoples of inhabited territories are not counted). Contiguous exploration in Eurasia and the building of overseas colonies in Russian America were some of the primary factors in Russian territorial expansion.
Document 4: Canadian Siberian Expeditionary Force: The Canadian Siberian Expeditionary Force (also referred to as the Canadian Expeditionary Force (Siberia) or simply C.S.E.F.) was a Canadian military force sent to Vladivostok, Russia, during the Russian Revolution to bolster the allied presence, oppose the Bolshevik revolution and attempt to keep Russia in the fighting against Germany. Composed of 4,192 soldiers and authorised in August 1918, the force returned to Canada between April and June 1919. The force was commanded by Major General James H. Elmsley. During this time, the C.S.E.F. saw little fighting, with fewer than 100 troops proceeding "up country" to Omsk, to serve as administrative staff for 1,500 British troops aiding the anti-Bolshevik White Russian government of Admiral Alexander Kolchak. Most Canadians remained in Vladivostok, undertaking routine drill and policing duties in the volatile port city.
Document 5: Russian rescue expedition of 1903: The Russian rescue expedition of 1903 was commissioned by the Saint Petersburg Academy of Sciences to rescue the groups of Baron Eduard Toll and Alexei Byalynitsky-Birulya that were left near New Siberian Islands by the Russian polar expedition of 1900–1902. The expedition was organized and led by Alexander Kolchak, then a young researcher and lieutenant of the Russian Navy, and later a ruler of Russia.
Document 6: Robert Peary: Rear Admiral Robert Edwin Peary Sr. (May 6, 1856 – February 20, 1920) was an American explorer and United States Navy officer who made several expeditions to the Arctic in the late 19th and early 20th centuries. He is best known for claiming to have reached the geographic North Pole with his expedition on April 6, 1909.
Document 7: Alexander Vasilyevich Belyakov: Alexander Vasilyevich Belyakov (Russian: Алекса́ндр Васи́льевич Беляко́в ; 21 December 1897 [O.S. 9 December] – 28 November 1982) was a Soviet flight navigator who, together with command pilot Valery Chkalov and co-pilot Georgy Baydukov, set a record for the longest uninterrupted flight in 1936 and made the first non-stop flight across the North Pole, flying from Moscow to Vancouver, Washington.
Document 8: Robert Falcon Scott: Captain Robert Falcon Scott, (6 June 1868 – 29 March 1912) was a British Royal Navy officer and explorer who led two expeditions to the Antarctic regions: the Discovery Expedition (1901–1904) and the ill-fated Terra Nova Expedition (1910–1913). On the first expedition, he set a new southern record by marching to latitude 82°S and discovered the Polar (Antarctic) Plateau, on which the South Pole is located. On the second venture, Scott led a party of five which reached the South Pole on 17 January 1912, four weeks after Roald Amundsen's Norwegian expedition. On their return journey, Scott's party discovered plant fossils, proving Antarctica was once forested and joined to other continents. A planned meeting with supporting dog teams from the base camp failed, despite Scott's written instructions, and at a distance of 150 miles from their base camp and 11 miles from the next depot, Scott and his companions perished.
Document 9: The White Horse (series): The White Horse is a Russian TV serial broadcast in 1993. The film, in 10 episodes, was directed by Gelii Ryabov. It presents the Russian civil war in Siberia from 1917–1920 and the struggle of the White Russians under the command of Admiral Alexander Kolchak against the Bolshevik forces, until his final defeat.
Document 10: Arctic policy of Russia: The Arctic policy of Russia is the domestic and foreign policy of the Russian Federation with respect to the Russian region of the Arctic. The Russian region of the Arctic is defined in the "Russian Arctic Policy" as all Russian possessions located north of the Arctic Circle. (About one-fifth of Russia's landmass is north of the Arctic Circle.) Russia is one of five countries bordering the Arctic Ocean. In 2011, out of 4 million inhabitants of the Arctic, roughly 2 million lived in arctic Russia, making it the largest arctic country by population. However, in recent years Russia's Arctic population has been declining.
Document 11: Russian polar expedition of 1900–02: The Russian polar expedition of 1900–1902 was commissioned by the Saint Petersburg Academy of Sciences to study the Arctic Ocean north of New Siberian Islands and search for the legendary Sannikov Land. It was led by the Russian geologist and Arctic explorer Baron Eduard Toll on the ship "Zarya". Toll and his three assistants vanished in late 1902 while exploring Bennett Island. One of the key members of the expedition was Alexander Kolchak, then a young researcher and lieutenant of the Russian Navy, and later a ruler of Russia.
Document 12: The Admiral (2008 film): The Admiral (Russian: Адмиралъ Admiral) is a 2008 biopic about Alexander Kolchak, a vice-admiral in the Imperial Russian Navy and leader of the anti-communist White Movement during the Russian Civil War. The film also depicts the love triangle between the Admiral, his wife, and the poet Anna Timiryova.
Document 13: Nikolay Kuibyshev: The son of an Imperial Russian Army officer, Kuibyshev joined the army and fought in World War I. Kuibyshev joined the Red Army in 1918 and became commander of the 3rd and 9th Rifle Divisions on the Southern Front of the Russian Civil War. During the 1920s, Kuibyshev commanded a corps, courses for Red Army commanders, the group of Soviet advisors in China, and the Main Directorate of the Red Army, and the Siberian Military District. He became secretary for Rabkrin, the Workers' and Peasants' Inspectorate, and a member of the Party Control Commission during the 1930s. Kuibyshev became commander of the Transcaucasian Military District in 1937. During the Great Purge, he was arrested in February 1938 and executed in August. Kuibyshev was posthumously pardoned in 1956.
Document 14: Spring Offensive of the Russian Army (1919): The Spring Offensive of the Russian Army was an offensive of the Russian Army of the White movement led by Alexander Kolchak on the Eastern Front of the Russian Civil War between March and April 1919.
Document 15: Alexander Kolchak: Alexander Vasilyevich Kolchak CB (Russian: Алекса́ндр Васи́льевич Колча́к , 16 November [O.S. 4 November] 1874 – 7 February 1920) was a polar explorer and commander in the Imperial Russian Navy, who fought in the Russo-Japanese War and the First World War. During the Russian Civil War, he established an anti-communist government in Siberia—later the Provisional All-Russian Government—and was recognised as the "Supreme Ruler and Commander-in-Chief of All Russian Land and Sea Forces" by the other leaders of the White movement from 1918 to 1920. His government was based in Omsk, in southwestern Siberia.
ground_truth: Alexander Kolchak