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