Monthly total freeboard and snow depth over Arctic sea ice from AMSR-E&2 and AVHRR measurements (2003-2020)

<strong>[Data description]</strong> Monthly total freeboard (Ft), snow depth (hs), and snow depth uncertainty over Arctic sea ice data for January-February-March months of the 2003-2020 period produced by Lee and Shi et al. (2021, manuscript under review) are provided. Both variables are derived from satellite passive infrared and microwave measurements: Total freeboard was obtained from AMSR-E&amp;2 measurements and snow depth was estimated from the AMSR and AVHRR measurements. The uploaded file titled "monthly averaged total freeboard and snow depth (JFM 2003-2020).zip" contains two directories: one for total freeboard and the other for snow depth. Naming convention is "variable_yyyymm.bin" and data format is 32-bit floating point array in shape of 304 x 448 (25 km polar stereographic grid). Here we provide an example Python code to read monthly snow depth of January 2003 using numpy.<br> import numpy as np<br> hs = np.fromfile('hs_200301.bin', dtype=np.float32).reshape(448,304) Geocoordinate tools for the 25 km polar stereographic grid are available at NSIDC website (https://nsidc.org/data/polar-stereo/tools_geo_pixel.html)<br> <br> <strong>[Abbreviations]</strong> AMSR: Advanced Microwave Scanning Radiometer<br> AVHRR: Advanced Very High Resolution Radiometer<br> NSIDC: National Snow and Ice Data Center<strong>[数据说明]</strong> 本数据集提供2003-2020年1-3月（JFM）北极海冰区域的月均总干舷（total freeboard, Ft）、积雪深度（snow depth, hs）及积雪深度不确定性数据，由Lee与Shi等（2021，待审稿手稿）制作。两类变量均源自卫星被动红外与微波遥感观测：总干舷由AMSR-E与AMSR2观测数据反演得到，积雪深度则基于先进微波扫描辐射计（Advanced Microwave Scanning Radiometer, AMSR）与先进甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）的观测数据估算得到。<br>上传的名为"月均总干舷与积雪深度（2003-2020年1-3月）.zip"的压缩包包含两个子目录，分别对应总干舷数据与积雪深度数据。数据命名规则为"variable_yyyymm.bin"，数据格式为32位浮点数组，维度为304×448，对应25千米极地立体投影网格。<br>下文提供一段使用numpy读取2003年1月积雪深度数据的示例Python代码：<br> import numpy as np<br> hs = np.fromfile('hs_200301.bin', dtype=np.float32).reshape(448, 304)<br>25千米极地立体投影网格的地理坐标工具可从美国国家雪冰数据中心（National Snow and Ice Data Center, NSIDC）官网获取：https://nsidc.org/data/polar-stereo/tools_geo_pixel.html<br><br><strong>[缩略词说明]</strong> AMSR: 先进微波扫描辐射计（Advanced Microwave Scanning Radiometer, AMSR）<br>AVHRR: 先进甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）<br>NSIDC: 美国国家雪冰数据中心（National Snow and Ice Data Center, NSIDC）