水科学进展2016，Vol.27Issue(2)：280-289,10.DOI:10.14042/j.cnki.32.1309.2016.02.013
季节性冰封热融浅湖水温原位观测及其分层特征
Field observations on water temperature and stratification in a seasonally ice-covered shallow thermokarst lake
摘要
Abstract
In order to better understand the thermodynamic characteristics of seasonally ice-covered shallow lake, the ice freezing and melting processes, water/ice temperature variation, as well as meteorological conditions were meas-ured in a typical thermokarst lake in central Qinghai-Tibet Plateau from October 2010 until July 2013. The temporal variations of lake temperature, development of thermocline, and the effects of lake ice on lake water thermal structure were investigated. Results indicated that a significant surface sublimation/ablation took place over the entire ice sea-son. The daily and seasonal vertical structures of the lake temperature are significantly dominated by the change of air temperature, surface radiative fluxes, wind speed, ice thermodynamics, and heat fluxes from the lake bottom sediment. During the cycle of “ice free-freezing onset-ice growing-melting onset-melting ice breakoff-ice free”, the lake tempera-ture takes up an annual cycle of“stratification-overturning-inversion stratification-inversion-normal stratification-overtur-ning-stratification”. The thermal stratification consists only of epilimnion ( mixing layer) and thermocline. Both layers can be replaced by a strong mixing process caused by strong gusts. Thus, compared with large lakes, the seasonal ice-covered shallow lakes have quite different thermodynamic characteristics.关键词
热融湖塘/水温/温度分层/湖冰/青藏高原Key words
thermokarst lake/water temperature/thermal stratification/lake ice/Qinghai-Tibet Plateau分类
建筑与水利引用本文复制引用
黄文峰,韩红卫,牛富俊,李志军..季节性冰封热融浅湖水温原位观测及其分层特征[J].水科学进展,2016,27(2):280-289,10.基金项目
国家自然科学基金资助项目（41402203）；冻土工程国家重点实验室开放基金资助项目（ SKLFSE201202） The study is financially supported by the National Natural Science Foundation of China （ No．41402203）． （）
