Lake ice thickness observations for arctic Alaska from 1962 to 2023

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 2023 as part of the CircumArctic Lake Observation Network (CALON), the Arctic Lake Ice Systems Science (ALISS), the Fish Creek Watershed Observatory (FCWO) projects. 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.

2012年至2023年间，作为环北极湖泊观测网络（CircumArctic Lake Observation Network, CALON）、北极湖泊冰系统科学（Arctic Lake Ice Systems Science, ALISS）以及菲什克里克流域观测站（Fish Creek Watershed Observatory, FCWO）项目的组成部分，研究团队对阿拉斯加北坡7个覆盖沿海平原至山地的典型研究区域内的39处湖泊开展了系统性湖冰厚度测量。测量工作于冬末（3月至5月）开展，此时湖冰厚度接近其年度最大值。本数据集按研究区域逐年统计平均冰厚，数据基于多湖泊的平均结果及单湖多次测量结果，测量点位通常选在湖泊中心附近。最大冰厚则通过结合当地气温记录（多数情况下还纳入雪深与雪密度数据）拟合冰生长曲线，并代入观测值估算得到。此外，本数据集还收录了1962年至2011年间由其他项目在上述相同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结果。本数据集仅纳入存在浮冰状态（即水深大于最大冰厚）的湖泊相关数据。