Lake Hoare (77° 38′ S, 162° 53′ E) is a perennially ice-covered lake at the eastern end of Taylor Valley in southern Victoria Land, Antarctica. The environment of this lake is controlled by the relatively thick ice cover (3–5 m) which eliminates wind generated currents, restricts gas exchange and sediment deposition, and reduces light penetration. The ice cover is in turn largely controlled by the extreme seasonality of Antarctica and local climate. Lake Hoare and other dry valley lakes may be sensitive indicators of short term (< 100 yr) climatic and/or anthropogenic changes in the dry valleys since the onset of intensive exploration over 30 years ago. The time constants for turnover of the water column and lake ice are 50 and 10 years, respectively. The turnover time for atmospheric gases in the lake is 30–60 years. Therefore, the lake environment responds to changes on a 10–100 year timescale. Because the ice cover has a controlling influence on the lake (e.g. light penetration, gas content of water, and sediment deposition), it is probable that small changes in ice ablation, sediment loading on the ice cover, or glacial meltwater (or groundwater) inflow will affect ice cover dynamics and will have a major impact on the lake environment and biota.

中文翻译：

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常年被冰覆盖的南极霍尔湖：物理环境、生物学和沉积

霍尔湖（77° 38' S，162° 53' E）是一个常年被冰覆盖的湖泊，位于南极洲维多利亚州南部泰勒河谷的东端。该湖的环境受相对较厚的冰盖 (3-5 m) 控制，它消除了风产生的洋流，限制了气体交换和沉积物沉积，并减少了光线的穿透。反过来，冰盖在很大程度上受到南极洲极端季节性和当地气候的控制。自 30 多年前开始密集勘探以来，霍尔湖和其他干谷湖泊可能是干谷短期（< 100 年）气候和/或人为变化的敏感指标。水柱和湖冰周转的时间常数分别为 50 年和 10 年。湖中大气气体的周转时间为 30-60 年。所以，湖泊环境对 10-100 年时间尺度的变化做出反应。因为冰盖对湖泊有控制影响（例如光穿透、水中的气体含量和沉积物沉积），冰消融、冰盖上的沉积物负载或冰川融水（或地下水）的微小变化很可能流入量将影响冰盖动态，并对湖泊环境和生物群产生重大影响。