ESA Ocean Colour Climate Change Initiative (Ocean_Colour_cci): Global chlorophyll-a data products gridded on a sinusoidal projection, Version 3.1

The ESA Ocean Colour CCI project has produced global level 3 binned multi-sensor time-series of satellite ocean-colour data with a particular focus for use in climate studies.

This dataset contains their Version 3.1 chlorophyll-a product (in mg/m3) on a sinusoidal projection at 4 km spatial resolution and at a number of time resolutions (daily, 5-day, 8-day and monthly composites). Note, the chlorophyll-a data are also included in the 'All Products' dataset.

This data product is on a sinusoidal equal-area grid projection, matching the NASA standard level 3 binned projection. The default number of latitude rows is 4320, which results in a vertical bin cell size of approximately 4 km. The number of longitude columns varies according to the latitude, which permits the equal area property. Unlike the NASA format, where the bin cells that do not contain any data are omitted, the CCI format retains all cells and simply marks empty cells with a NetCDF fill value. (A separate dataset is also available for data on a geographic projection.)

Please note, this dataset has been superseded. Later versions of the data are now available.

欧洲航天局（ESA）海洋颜色连续变化（Ocean Colour CCI）项目已生成全球范围的3级多传感器时间序列海洋颜色卫星数据集，该数据集特别针对气候研究应用。本数据集包含其3.1版本叶绿素a产品（单位：mg/m3），采用正弦投影，空间分辨率为4公里，并具有多种时间分辨率（日、5日、8日和月度复合）。请注意，叶绿素a数据亦包含在“所有产品”数据集中。该数据产品采用正弦等面积网格投影，与NASA标准3级分箱投影相匹配。默认的纬度行数为4320，从而使得垂直分箱单元大小约为4公里。经度列数根据纬度变化，以实现等面积特性。与NASA格式不同，CCI格式保留了所有单元，并仅用NetCDF填充值标记空单元。（另外还有在地理投影上的数据集可供使用。）请注意，本数据集已被更新替代。现在，数据集的后续版本已经可用。