Harmattan

Japanese: harmattan
Harmattan

…The strong south or southwest wind that blows in the Red Sea is also called khamsin. harmattan A northeasterly trade wind that blows from the Sahara Desert in winter (November to March) along the coast of western Africa from the north shore of the Gulf of Guinea to Cape Verde. It is a dry wind that is often accompanied by dust.

From [Sedimentation]

...It can also be transported long distances by air currents, sink by gravity during calm periods, or fall to the ground with rain or ice crystals. Good examples are the yellow sand commonly seen in Japan in early spring and the harmattan that blows southwest from the Sahara Desert in West Africa.
[Glacial deposition]
The debris entrained and transported by the flowing glacier is retained there as the ice melts.

*Some of the terminology explanations that mention "harmattan" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また紅海に吹く南または南西の強風もハムシンという。 ハルマッタンharmattanアフリカの西部,ギニア湾北岸からベルデ岬へかけての沿岸部に,冬季(11月~3月)にサハラ砂漠から吹いてくる北東貿易風。乾燥した風で,風塵を伴うことが多い。…

【堆積作用】より

…また,気流によって長距離を運搬され,静穏時に重力によって沈降したり,雨や氷晶とともに地表に落下する。春先に日本でよくみられる黄砂や西アフリカでサハラ砂漠から南西へ吹くハルマッタンharmattanはよい例である。
[氷河の堆積作用]
 流動する氷河中に取り込まれて運搬された岩屑は氷がとけることにより,そこに残留する。…

※「harmattan」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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