Near-bed stratification controls bottom hypoxia in ice-covered alpine lakes

Dataset supporting the study of the development of near-bottom hypoxia in high-altitude lakes. Herein, hypoxia is set for dissolved oxygen concentrations equal to or below 2 mg/l Variables: Lake (name of the lake), Year (corresponding winter of measurements),Max_depth (lake'smax depth, in m),Lake_surface (lake's surface area in m2), Drainage_ratio (unitless), Percent_macrophyte_cover (lake's average macrophyte cover, in %), Catchement_NDVI (unitless),Secchi (Secchi depth in m, measured over the previous summer), ice_duration (estimated duration of the ice cover, in days), T_ice_on (average water column temperature at the date of ice_on, in °C), DOinit (average concentration in dissolved oxygen at ice-on, in mg/l), DOinitsat (average saturation in dissolved oxygen_DO_ at ice-on, in %), time_under_hypoxia (duration in days of near-bottom hypoxia under the ice), time_to_hypoxia (time in days to reach near-bottom hypoxia under the ice, after the onset of ice), Kexp (near_bottom DO decay rate under the ice, in /d), Klm (rate of near_bottom DO decrease under the ice, in mg/l/d), Kheat (deep warming rate under the ice, in /d). see the corresponding paper for more details

本数据集用于支撑高海拔湖泊近底缺氧发育过程的相关研究。本研究将溶解氧浓度小于等于2mg/L的水体状态定义为缺氧。数据集包含以下变量：湖泊名称（Lake）、对应测量冬季的年份（Year）、湖泊最大水深（单位：米）、湖泊表面积（单位：平方米）、无单位排水比（Drainage_ratio）、湖泊水生植物平均盖度（单位：%）、流域归一化差分植被指数（Normalized Difference Vegetation Index，NDVI，无单位）、夏季实测塞氏盘深度（Secchi，单位：米）、冰盖估计持续时长（单位：天）、封冻日水柱平均水温（单位：℃）、封冻时溶解氧平均浓度（单位：mg/L）、封冻时溶解氧平均饱和度（单位：%）、冰盖下近底缺氧持续时长（单位：天）、冰盖形成后至近底缺氧出现的时长（单位：天）、冰盖下近底溶解氧衰减速率（单位：/d）、冰盖下近底溶解氧降低速率（单位：mg/L/d）、冰盖下深层水体增温速率（单位：/d）。更多细节可参阅对应学术论文。