This is a portion of the data used to calculate 2008 and 2013 cumulative human impacts in: Halpern et al. 2015. Spatial and temporal changes in cumulative human impacts on the world's ocean.

Seven data packages are available for this project:

(1) supplementary data (habitat data and other files);

(2) raw stressor data (2008 and 2013);

(3) stressor data rescaled by one time period (2008 and 2013, scaled from 0-1);

(4) stressor data rescaled by two time periods (2008 and 2013, scaled from 0-1);

(5) pressure and cumulative impacts data (2013, all pressures);

(6) pressure and cumulative impacts data (2008 and 2013, subset of pressures updated for both time periods);

(7) change in pressures and cumulative impact (2008 to 2013).

All raster files are .tif format and coordinate reference system is mollweide wgs84.

Here is an overview of the calculations:

Raw stressor data -> rescaled stressor data (values between 0-1) -> pressure data (stressor data after adjusting for habitat/pressure vulnerability) -> cumulative impact (sum of pressure data) -> difference between 2008 and 2013 pressure and cumulative impact data.

This data package includes 2008 and 2013 raw stressor data.

The 2008 data includes 18 raster files (preceeded by raw_2008_).

The 2013 data includes 19 raster files (preceeded by raw_2013_).

There is no sea level rise data for 2008.