Lake ice thickness observations for arctic Alaska from 1962 to 2017

Lake ice thickness has been systematically measured in a set of 39 lakes located in seven representative study areas ranging from the coastal plain to the mountains of Alaska's North Slope from 2012 to 2017 as part of the CircumArctic Lake Observation Network (CALON) and the Arctic Lake Ice Systems Science (ALISS) Project. Measurements are made in the late winter (March to May) when lake ice thickness is close to its annual maximum. Average ice thicknesses are reported for study area per year based on average from many lakes and multiple measurements per lake (typically made near the lake center). Maximum ice thickness is estimated based on fitting an ice growth curve based on local air temperature records (and in most cases snow depth and density) to observations. Additional late winter ice thickness data from these same study areas collected by other project is also reported for the period from 1962 to 2011 and estimates of maximum ice thickness made using the same technique. Only lakes with floating ice regimes (i.e. depths greater than maximum ice thickness) are reported in this dataset.

作为环北极湖泊观测网络（CircumArctic Lake Observation Network, CALON）与北极湖泊冰系统科学（Arctic Lake Ice Systems Science, ALISS）项目的一部分，2012至2017年间，研究团队针对阿拉斯加北坡7个覆盖从沿海平原至山地梯度的典型研究区域内的39座湖泊，系统性开展了湖冰厚度测量。测量时段定于冬末（3月至5月），此时湖冰厚度接近年度最大值。本数据集按研究区域逐年公布平均冰厚，数据基于多湖泊的均值及单湖多次测量结果（测量点位通常设于湖中心附近）；最大冰厚则通过将基于当地气温记录（多数情况下结合积雪深度与密度）构建的冰生长曲线拟合至实测数据进行估算。此外，本数据集还收录了1962至2011年间其他项目在上述研究区域采集的冬末湖冰厚度数据，以及采用相同方法估算的最大冰厚数据。本数据集仅纳入具有漂浮冰态（即水深大于最大冰厚）的湖泊。