Global Eutrophication Watch

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Dataset Specification

Specify the path to your monthly CHL asset below. The dataset should contain a variable named "chlor_a".

MODIS/Aqua Level-3 (Global) SeaWiFS Level-2 (NOWPAP region) SGLI/GCOM-C (Level-2 G-Portal) YOC CHL Product (Regional) YOC (Trend) + SGLI (Composite) userAsset

Trend Detection Interval

Select the start/end year interval for trend detection.

Start year: 2003

End year: 2024

CHL Composite Interval

The start/end date for computing the temporal composite of CHL.

Start date

End date

Select cutoff level

[mg/m^3]

Click a point on the map to update the chart or type in your lon/lat values and then press "enter".

Longitude:
Latitude:	Pin the map

Select a Shapefile (zipped) or KML file*

Note: Shapefile must be zipped.
The area must not exceed 1,000 × 1,000 km. If you require data for a larger area, please contact us at


	Monthly average
	Average of chlorophyll-a (CHl-a) within the area of interest (AOI) specified by Shapefile (zip) or KML will be calculated.
	Generate GeoTIFF
	Coastal Eutrophication Potential within the AOI will be generated(optional)

Point Status ::

Coastal Eutrophication Potential (CEP)

The Global Eutrophication Watch is designed to allow users to perform a preliminary screening of coastal eutrophication potential (CEP) using satellite-derived chlorophyll (CHL) data. This update version (V2) of the App (202209) is bundled with MODIS/Aqua-derived CHL product (Global), SGLI/GCOM-C (250 m resolution dataset around Japan) and the YOC blended CHL dataset (a regional dataset in the Northwest Pacific region). Users are also able to provide a link to their own asset (dataset) of monthly CHL for the App to read.

The manuscript of this App introduces the terms (1) eutrophication potential: waters with both Low (L) or High (H) CHL levels and Increasing (I) trends (LI, HI); (2) eutrophic potential: waters with CHL levels above a given threshold (H); (3) oligotrophication potential: the opposite of eutrophication potential, waters both L or H but with Decreasing (D) CHL levels (LD, HD). LI and HI are of a particular interest as they indicate waters in a process of becoming eutrophic (LI) or a progression of an already eutrophic (HI) water body. For more detailed information please refer to the manuscript "Globally consistent assessment of coastal eutrophication" available from the link
https://doi.org/10.1038/s41467-021-26391-9