Inorganic Pollution 2008 - KNB

Non-point source inorganic pollution was modelled with global 1 km2 impervious surface area data (http://www.ngdc.noaa.gov/dmsp/) under the assumption that most of this pollution comes from urban runoff. These data will not capture point-sources of pollution or nonpoint sources where paved roads do not exist (e.g., select places in developing countries). These values were then aggregated to the watershed and distributed to the pour point (i.e., stream and river mouths) for the watershed with raster statistics (i.e., aggregation by watershed). Finally, spread of the driver values into coastal waters at each pour point was modelled with a cost-path surface on the basis of a decay function that assigns a fixed amount of the driver (0.5% of the value in the previous cell) in the initial cell and then evenly distributes the remaining amount of driver in all adjacent and ‘unvisited’ cells, repeated until a minimum threshold (0.05% of global maximum) is reached. This approach to modelling river plumes is diffusive and so allows drivers to wrap around headlands and islands.

Raw stressor data from "Benjamin Halpern, Melanie Frazier, John Potapenko, Kenneth Casey, Kellee Koenig, et al. 2015. Cumulative human impacts: raw stressor data (2008 and 2013). Knowledge Network for Biocomplexity. doi:10.5063/F1S180FS."

Simple

Date ( Publication )
2015-07-14
Status
Completed
Originator
Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, USA - Benjamin S. Halpern ( )

Maintenance and update frequency
Unknown
Keywords ( Theme )
  • raw stressors
Keywords ( Place )
  • World
Keywords ( Theme )
  • inorganic
Keywords ( Theme )
  • ocean
Keywords ( Theme )
  • pollution
Access constraints
License
Use constraints
License
Other constraints
Creative Commons CC-0 license
Spatial representation type
Grid
Denominator
1000000
Metadata language
en
Character set
UTF8
Topic category
  • Oceans
  • Environment
Begin date
2008-01-01
End date
2008-12-31
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S
E
W
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Reference system identifier
WGS 1984
Distribution format
  • geotiff ( Not Set )

OnLine resource
Supplementary information ( WWW:LINK-1.0-http--link )
OnLine resource
Download original dataset_Mollweide ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
PNG8 ( OGC:WMS-1.3.0-http-get-map )
Hierarchy level
Dataset
Statement
Not set

Metadata

File identifier
6cbaa5f0-6f8c-460a-bb8c-92095bae10d7 XML
Metadata language
en
Character set
UTF8
Date stamp
2017-11-09T17:27:46
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
UN Environment-GRID - Antonio Benvenuti ( )

 
 

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W
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Keywords

inorganic ocean pollution raw stressors

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