HFU - Hentai Fuyu

Japanese: HFU - えっちえふゆー
HFU - Hentai Fuyu

...The crustal heat flow is calculated by measuring the thermal gradient (called the geothermal temperature gradient) and the thermal conductivity of the crust, and multiplying these two measurements together. The unit is the amount of heat passing through a unit area in a unit time, 10 -6 cal/cm 2 ・s, and is called the heat flow unit (HFU). There are about 10,000 actual measurements around the world, and the average value on land is estimated to be about 1.5 HFU, the average value in the ocean, including heat loss due to hydrothermal action, is about 2.2 HFU, and the global average is estimated to be about 1.9 HFU.

*Some of the terminology that mentions "HFU" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…地温こう配という)と地殻の熱伝導率を実測し,その両方の測定値を掛け合わせると地殻熱流量が求められる。単位は単位時間に単位面積を通過する熱量であって,10-6cal/cm2・sが用いられ,熱流量単位(HFU)と呼ばれる。全世界で約1万点の実測値があり,陸地での平均値は約1.5HFU,海洋での平均値は熱水作用による放熱量も含めて約2.2HFU,全世界の平均値は約1.9HFUと推定されている。…

※「HFU」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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