Water, heat and chloride budgets of the crater lake, Yugama at Kusatsu-Shirane volcano, Japan.
Water, heat and chloride budgets of the crater lake, Yugama at Kusatsu-Shirane volcano, Japan.
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日本草津白根火山汤伽马火山口湖的水、热和氯化物预算。
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
K. Nogami
中科院分区：
文献类型：
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作者：
T. Ohba;J. Hirabayashi;K. Nogami
1988年至1993年间，日本草津-什兰火山的一个火山口湖--余伽湖的温度和水化学发生了显著的变化。热量、水和氯化物的预算使用盒子模型进行评估。1989年以前，进入该湖的热量和氯化物输入分别为3∼10兆瓦和1∼3.5吨/天；但到1990年，这一数字增加到19-25兆瓦和4-12吨/天。氯离子浓度与湖水pH之间的强相关性表明，HCl溶液或HCl水蒸气的输入是导致氯离子变化的原因。这些变化，加上1990年在火山周围观察到的高水平地震活动，似乎与冷却岩浆周围地区形成的裂缝相一致。
Significant changes in temperature and water chemistry were observed in Lake Yugama, a crater lake at Kusatsu-Shirane volcano, Japan, between 1988 and 1993. Heat, water and chloride budgets were evaluated with a box model. Until 1989, heat and chloride inputs into the lake were 3∼10 MW and 1∼3.5 tons/day, respectively; but these increased to 19–25 MW and 4–12 tons/day by 1990. The strong correlation between the Cl– concentration and lake water pH suggests input of a HCl solution or HCl vapor as the cause of the Cl– change. These changes coupled with the high level of seismicity observed around the volcano in 1990 seem to be consistent with the formation of fractures in the surrounding area of a cooling magma.