Meromixis in hypersaline Mono Lake, California. 3. Biogeochemical response to stratification and overturn
Meromixis in hypersaline Mono Lake, California. 3. Biogeochemical response to stratification and overturn
复制标题
加利福尼亚州高盐莫诺湖的 Meromixis。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
C. Culbertson
中科院分区：
文献类型：
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作者：
L. Miller;R. Jellison;R. Oremland;C. Culbertson
莫诺湖是一个末端的咸水湖，在1982年-L 983年变得外生的盐湖，并一直保持分层直到1988年11月。在此期间，单离子保持缺氧和近等温，而上层混合离子氧化良好，表现出季节性的热状况。由于沉积物的扩散通量，单分子膜中溶解的硫化物和甲烷增加。冬季混合到化跃层，将硫化物和甲烷分布在整个混合层中。全湖溶解硫化物和甲烷的库存反映了随着时间的推移，浓度增加和单离子体积减少之间的平衡。倾覆时，整个水柱是等温缺氧的。溶解的硫化物(380×10“mol)在1周内被分子氧氧化。甲烷(12×10~6摩尔)通过空气-水界面的微生物氧化和通风去除较慢。
Mono Lake is a terminal, saline lake that became ectogenically meromictic in 1982-l 983 and remained stratified until November 1988. During this period, the monimolimnion remained anoxic and nearly isothermal, while the upper mixolimnion was well oxygenated and exhibited a seasonal thermal regime. Dissolved sulfide and methane increased in the monimolimnion as a result of diffusive flux from the sediments. Winter mixing down to the chemocline distributed sulfide and methane throughout the mixolimnion. Lakewide inventories of dissolved sulfide and methane rcflccted the balance between increased concentrations and decreased monimolimnion volume over time. At overturn, the entire water column was isothermal and anoxic. Dissolved sulfide (380 x 10” mol) was oxidized in 1 week by molecular oxygen. Methane ( 12 x 1 O6 mol) was removed more slow1 y by microbial oxidation and ventilation across the air-water interface.