Nowadays, a type of frost is called juhyo, but in the past it was a general term for ice that adheres to tree branches. Some people also refer to juhyo as juhyo and others as hoarfrost. Ice that adheres to trees and other objects has various names depending on the region. The famous "hanaboro" of Mount Unzen in Kyushu can be either juhyo or crude ice. Nagano Prefecture's "kibana" is closer to juhyo. In Niigata Prefecture, it is called "shiga." The conditions for juhyo to form are strong winds and the coming and going of clouds and mist. When the ones attached to trees grow large, they are called monsters because of their characteristic shape. The monsters on Mount Zao in Tohoku are famous, and they form when the clouds and mist mixed with snow that accompany the winter monsoon blow over the Aomoritodomatsu trees growing on the windward slopes for a long period of time. The frost seen on the summit of Mount Fuji grows during bad weather with southwesterly winds in early spring and turns into thick, coarse frost. A seasonal word for winter. [Takeji Shinohara] [Reference] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
現在は霧氷の一種を樹氷とよぶが、以前は木の枝などに付着する氷の総称であった。また、現在は樹霜と名づけられるものを樹氷とし、それ以外を霧氷とする人もある。樹木や地物に付着する氷は、地方によっていろいろな呼び名がある。九州雲仙岳(うんぜんだけ)の名物とされる「花ボロ」は、樹氷のこともあれば粗氷のこともある。長野県の「木花(きばな)」は、むしろ樹霜に近い。新潟県ではこれを「しが」とよぶ。樹氷ができる条件は、風が強く雲霧が去来することである。樹木についたものが大きく成長すると、形の特徴からモンスターmonsterとよばれる。東北の蔵王山(ざおうさん)のモンスターが著名であるが、冬の季節風に伴う雪まじりの雲霧が長時間にわたって、風上側斜面に生えたアオモリトドマツなどに吹き付ける際にできる。富士山頂にみられるものは、春先の南西風の悪天のときに成長して厚い粗氷性の着氷になる。冬の季語。 [篠原武次] [参照項目] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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