Historic coastline age raster (AGE 2021)

DESCRIPTION:   Global paleo drowning map indicating the most recent 500 yr time period a pixel was land. The reconstruction was done using the global bathymetric model (GEBCO 2021) and a state-of-the-art global spatiotemporal sea level curve. The global sea  level curve was generated using the software SELEN4 (10.5281/zenodo.3520451) and raster DEMSRE3a (10.5281/zenodo.1637816). MAPPED CATEGORIES: from 0 to 260 in bins of 5 (e.g., 0, 5, 10, 15, 20, ..., 260; each bin corresponds to 500 yr)   0 = 0 yr BP 5 = 500 yr BP 10 = 1000 yr BP ... ... 100 = 10000 yr BP ... ... 200 = 20000 yr BP ... ... 260 = 26000 yr BP MAPPED NA VALUES: No Data = pixel has always been Below (Past) Sea Level since 26000 BP. SPATIAL RESOLUTION: The spatial resolution of the dataset is a factor 8 of the original GEBCO. TEMPORAL RESOLUTION: Temporal mapping resolution is 500 yr. DIRECTORY STRUCTURE: The dataset is provided in two formats: 1. TILED IN ASCII (AGE_tiles.zip): tiles of 10x10 degrees each representing the drowning age. File naming: structure:   AGE--.asc example:     AGE-10-010-020.asc description: Tile with drowning age from 0 to 10 degrees latitude, and 10 to 20 degrees longitude.      2. MOSAIC IN TIF (AGE_mosaic.tif):   Global drowning map. File naming: structure:   AGE.tif example:     AGE.tif description: Global drowning map