Sea ice draft measured by upward looking sonar at mooring site AWI207-2

Lograte: 8 min. The data identification flags (columns 6 & 8) stand for: 1=ice, 2=thin ice/open water, 0=water, empty cells=rejected/erroneous data. Depth was calculated by: (p_uls-p_atm)/(rho * g), where p_uls is the measured water pressure, p_atm is the atmospheric pressure from ECMWF (http://www.ecmwf.int) reanalysis, rho is 1027 kg/m**3, and g is the latitude-dependent acceleration of gravity.

数据集标识Lograte：采样间隔为8分钟。数据识别标记（第6列与第8列）的含义如下：1表示冰，2表示薄冰/开阔水域，0表示水域，空单元格代表被剔除的错误数据。水深计算公式为：(p_uls - p_atm)/(ρ·g)，其中p_uls为实测水压，p_atm为取自欧洲中期天气预报中心（ECMWF，http://www.ecmwf.int）再分析数据的大气压强，ρ取值为1027 kg/m³，g为随纬度变化的重力加速度。