...It is unclear whether arctic desert soils are distributed in the Arctic. In the well-drained desert pavements of the polar regions of northern Canada and northern Greenland, polar desert soils containing about 6% soil organic matter derived from lichens, algae, and diatoms in the surface layer, with accumulated carbonates, and an alkaline reaction, are found. In the tundra climate of the polar region, where the monthly mean temperature is above 0°C for only 2 to 4 months, precipitation is generally low (annual precipitation of 250 to 300 mm) and permafrost exists underground. *Some of the terminology that refers to "polar desert soil" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…極寒砂漠土が北極地方に分布するかどうかは不明である。カナダ北部やグリーンランド北部の極地の排水良好なデザートペーブメントdesert pavement(砂漠舗石)には地衣類・藻類・ケイ藻類に由来する土壌有機物を表層に6%ほど含んだ,炭酸塩の集積した,アルカリ性反応を示す極地砂漠土がみられる。月平均気温が0℃以上になる月が2~4ヵ月しかない寒帯のツンドラ気候下では,一般に降水量も少なく(年降水量250~300mm),地下に永久凍土層が存在する。… ※「極地砂漠土」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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