Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2022S110, deployed during Antarctic Fast Ice Network 2022 (AFIN 2022)@en

Snow height was measured by the Snow Buoy 2022S110, an autonomous platform, installed in the Atka Bay, Antarctic during Antarctic Fast Ice Network 2022 (AFIN 2022). The resulting time series describes the evolution of snow height as a function of place and time between 29 Jun 2022 and 29 Jan 2023 in sample intervals of 1 hour. The Snow Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. The buoy was installed on fast ice. In addition to snow height, geographic position (GPS), barometric pressure, air temperature, and an internal ice temperature were measured. Negative values of snow height occur if surface ablation continues into the sea ice. Thus, these measurements describe the position of the sea ice surface relative to the original snow-ice interface. Differences between single sensors indicate small-scale variability of the snow pack around the buoy. The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, position: The geographic position is flagged +1 if the drift velocity, as derived from the GPS longitude and latitude, exceeds a threshold of 10 deg latitude or 50 deg longitude per time step; +2 if the position exceeds extreme values, such as longitude > 360 deg; +4 if the position is exactly 0.0. Quality flag, snow: The snow height is flagged for each sensor +1 for manual corrections during processing (e.g. sensor issues); +2 if the snow accumulation exceeds 0.1 m per hour; +4 if the difference in snow height is larger than 0.03 m compared to values within the last and next 2 hours; +32 if the value exceeds the height of sensor on the platform at 1.5 m. Quality flag, temperature: The air temperature is flagged +1 for manual corrections during processing (e.g. sensor issues); + 32 if the value is below – 50 °C. Quality flag, pressure: The barometric pressure is flagged +1 for manual corrections during processing (e.g. sensor issues).本数据集的雪面高度观测由部署于南极阿特卡湾（Atka Bay）的自主观测平台Snow Buoy 2022S110完成，该平台参与了2022年南极固定冰网络（Antarctic Fast Ice Network 2022, AFIN 2022）科考项目。所得时间序列记录了2022年6月29日至2023年1月29日期间，该区域雪面高度随空间与时间的演化规律，采样间隔为1小时。该雪浮标搭载4台独立声呐（sonar）传感器，可覆盖浮标周边约10平方米的观测范围。浮体部署于固定冰之上，除雪面高度外，同步观测的参数还包括地理坐标（GPS, Global Positioning System）、大气压强、气温以及浮体内部的冰温。当表面消融延伸至海冰时，雪面高度会出现负值，此类观测值表征的是海冰表面相对于初始雪冰界面的位置。各传感器间的观测差值可反映浮标周边积雪的小尺度空间变异性。本数据集已完成预处理，并包含针对各类异常数据的质量标识。质量标识值为各独立错误代码的累加和，取值0代表无异常。 地理坐标质量标识：若由GPS经纬度计算得到的漂移速率超过每时间步10度纬度或50度经度的阈值，则标识+1；若坐标超出极端值（如经度大于360度），则标识+2；若坐标恰好为0.0，则标识+4。 雪面高度质量标识：针对每台传感器，若处理过程中进行了人工校正（如传感器故障），则标识+1；若小时积雪增量超过0.1米，则标识+2；若与前后2小时内的观测值差值大于0.03米，则标识+4；若观测值超出平台上传感器的额定安装高度1.5米，则标识+32。 气温质量标识：若处理过程中进行了人工校正（如传感器故障），则标识+1；若观测值低于-50℃，则标识+32。 大气压强质量标识：若处理过程中进行了人工校正（如传感器故障），则标识+1。