Sea ice mass balance (SIMB) data from The Sea Ice Dynamics Experiment (SIDEX); Beaufort Gyre, 2021

The dataset contains measurements made from four autonomous Seasonal Ice Mass Balance (SIMB) buoys. The buoys were deployed in the spring of 2021 as part of a field experiment (SIDEX: The Sea Ice Dynamics Experiment) in the Beaufort Sea. This work was performed as part of a project “Ice Mass Balance Buoys for the Arctic Observing Network: Observing and Understanding a Changing Arctic Sea Ice Cover.” The project goal is to collect measurements that allow us to determine, delineate, and attribute the thermodynamic changes in the mass balance of the Arctic sea ice cover. Each buoy measured position, barometric pressure, air temperature, and a vertical profile of temperature from the air, through the snow, through the ice, and into the upper ocean. An above-ice downward-looking sounder tracked the position of the surface and an underwater upward-looking sounder tracked the position of the ice bottom. Sensors were placed every 0.02 meters (m) on the vertical temperature string. Measurements were made every four hours and results were transmitted via Iridium. There is one csv file for each SIMB.

本数据集包含4台自主式季节冰质量平衡（Seasonal Ice Mass Balance, SIMB）浮标采集的观测数据。这些浮标于2021年春季部署，作为波弗特海海冰动力学实验（Sea Ice Dynamics Experiment, SIDEX）野外试验的组成部分。本工作隶属于项目"北极观测网络冰质量平衡浮标：观测与解析变化中的北极海冰覆盖"。该项目的目标是采集观测数据，以实现对北极海冰覆盖质量平衡过程中热力变化的确定、划定与归因分析。每台浮标可采集位置、气压、气温，以及从大气经积雪、海冰直至上层海洋的垂直温度廓线。浮标搭载的冰面上方向下探测声呐可追踪海冰表面位置，水下向上探测声呐则可监测海冰底部位置。垂直温度链上的传感器布设间距为0.02米（m）。观测每4小时开展一次，数据通过铱星（Iridium）系统传输。每台SIMB浮标对应一个CSV格式数据文件。