Shipborne visual observations of Arctic sea ice, link to original files

Data from individual cruises are given a unique identifying number (id), an integer, that is included in the data file names. Filenames are cruise_id_metadata.csv and...各单次航次的数据集均被分配唯一的整型识别编号（id），该编号会包含在数据文件名中。文件名格式为`cruise_id_metadata.csv`及……