Monthly averages and overall average (2005-2009) of the light attenuation coefficient in the water column for photosynthetically available radiation (KPAR)

GeoTiff datasets of average coefficient of light attenuation for photosynthetically active radiation (KPAR) in the Greater North Sea and Celtic Seas. The dataset kPAR2005_ 2009_250.tif contains the average annual KPAR calculated over the years 2005-2009. All other datasets are monthly averages (for 2005-2009), Numbers in the GeoTiff names inficate the montha, e.g. the dataset kpar_month_01_250.tif contains monthly averages for the month of January, kpar_month_02_250.tif is for the month of February and so on. Raster cell size 250m. Values are dimensionless and fall between 0 and 1, with 0 being no attenuation (clear water) and 1 being full light attenuation (very turbid). Data was collected by the MERIS satellite.

Additional information source:

Saulquin, B, Hamdi, A., Gohin G., Populus, J., Mangin A., Fanton d'Andon, O. (2013). Estimation of the diffuse attenuation coefficient KdPAR using MERIS and application to seabed habitat mapping. Remote Sensing of Environment 128; 224â233.

北海南部及凯尔特海地区光合有效辐射（KPAR）平均光衰减系数的GeoTiff数据集。数据集kPAR2005_2009_250.tif包含了2005至2009年期间计算的平均年KPAR值。其余数据集均为月度平均值（2005-2009年），GeoTiff文件名中的数字代表月份，例如，数据集kpar_month_01_250.tif包含了1月份的月度平均值，kpar_month_02_250.tif则为2月份的数据，依此类推。栅格单元大小为250米。数值为无量纲，介于0至1之间，其中0代表无衰减（清水），1代表完全衰减（极度混浊）。数据由MERIS卫星收集。