Pole of Inaccessibility

Japanese: Pole of Inaccessibility(英語表記)PoleofInaccessibility
Pole of Inaccessibility

The aurora is a circular area with a radius of about 2,500 km around the South Magnetic Pole, and Showa Station is located in this auroral zone. The farthest point from the continent is called the Pole of Inaccessibility (latitude 82°06′S, longitude 54°58′E), and the Soviet Union (reached it on December 14, 1958) and the United States explored the area.
[Topography, Geology]
Antarctica lies almost entirely within the Antarctic Circle, and is divided into East Antarctica (also called Greater Antarctica), an older continental mass belonging to the Eastern Hemisphere, and West Antarctica (Little Antarctica), which is geologically newer, by the Transantarctic Mountains.

From the North Pole

The polar region is a ring of light with a maximum frequency of about 2,500 km around this point. The area around 84°N and 170°W, far from the coast and densely populated by sea ice, was once called the Pole of Inaccessibility or Ice Pole, but this has become meaningless due to the development of aircraft and powerful icebreakers.
[Weather and Climate]
During the winter, when the polar night continues, radiative cooling dominates the heat balance in the Arctic.

*Some of the terminology that refers to "Pole of Inaccessibility" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…オーロラ(極光)の出現頻度の高い地帯は南磁軸極を中心として半径約2500kmのドーナツ状の地域で,昭和基地はこの極光帯にある。大陸内部にあって周辺から最も遠い地点は到達不能極Pole of Inaccessibility(南緯82゜06′,東経54゜58′)と呼ばれるが,ソ連隊(1958年12月14日到達)とアメリカ隊が付近を探査した。
[地形,地質]
 南極大陸はほぼ南極圏内にあり,それを大きく二分する南極横断山地Transantarctic Mountainsによって,東半球に属する古い大陸塊の東南極大陸(大南極もいう)と,地質年代がこれより新しい西南極大陸(小南極)とに分けられる。…

【北極】より

…この点を中心に半径約2500km付近に最大頻度をもつ極光帯がドーナツ状に取り巻いている。陸岸から遠く海氷の密集する北緯84゜,西経170゜付近は到達不能極Pole of Inaccessibilityや氷極と呼ばれていたが,航空機や強力な砕氷船の発達により無意味となった。
[気象・気候]
 極夜の続く冬季には放射冷却が北極の熱収支を支配する。…

※「Pole of Inaccessibility」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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