Arctic Sea Ice Melt Pond Statistics and Maps, 1999-2001, Version 1

Visible band imagery from high-resolution satellites were acquired over four Arctic Ocean sites (three in 1999) during the summers of 1999, 2000, and 2001. The sites were within the median extent of the perennial ice pack. Imagery was analyzed using supervised maximum likelihood classification to derive either two (water and ice) or three (pond, open water, and ice) surface classes. Clouds were masked by hand. The data set consists of tables of pond coverage and size statistics for 500 m square cells within 10 km square images (image resolution is 1 meter), along with the surface type maps called Image Derived Products (IDPs) from which the pond statistics were derived. A total of 101 images over the three summers and four sites were used for pond statistics, out of a total of 1056 images acquired. The images are irregularly spaced in time.

Data are stored in Microsoft Excel format and ASCII text, image files are stored as GeoTIFF binary images, browse images in PNG, and JPG image files, and are available from August 1999 and generally for May into September for 2000 and 2001 via FTP.

1999年、2000年及2001年夏季，科研团队于北冰洋的4个观测站点（其中3个站点的影像采集始于1999年）获取了高分辨率卫星可见光波段影像。所有观测站点均处于多年海冰覆盖范围的中位区间内。
采用监督式最大似然分类法对影像开展分析，以提取两类（水体与海冰）或三类（冰面水塘、开阔水域与海冰）地表类别。云区通过人工方式完成掩膜剔除。
本数据集包含10km×10km影像范围内500m×500m网格单元的冰面水塘覆盖率与尺寸统计表格，以及用于提取上述水塘统计数据的地表类型图——这类产品被称为影像衍生产品（Image Derived Products, IDPs）。本次累计获取影像1056幅，最终选取其中101幅用于冰面水塘统计分析，这些影像覆盖三个夏季的4个观测站点，且时间采样分布不均。
数据集存储格式包括Microsoft Excel表格与ASCII文本；影像文件采用GeoTIFF二进制格式存储，预览影像则采用PNG与JPG格式。数据可通过FTP获取，获取时段自1999年8月起，2000年及2001年的可获取时段通常为每年5月至9月。