Sustainable Development Goals (SDGs) require timely and objective reporting. Many countries do not have in-situ nutrient measurements to monitor water quality and therefore need other tools to quantify eutrophication and monitor progress on SDG 14.1.1a – Index of Coastal Eutrophication. To support this need, GEO Blue Planet and Esri formed a partnership to develop and execute a methodology for quantifying the impact of eutrophication using satellite-derived chlorophyll-a measurements. Esri, through ArcGIS Pro, used a series of ModelBuilder models and provided the statistics for the global indicators for eutrophication so the data can be included in the 2021 SDG Progress report. The collaboration involves developing dashboard applications that include information on chlorophyll-a deviations from baseline values and daily chlorophyll-a anomalies. These tools will assist countries by identifying locations of potential eutrophication hot spots and target in situ nutrient sampling. For more information visit the SDG 14.1 Hub Site (https://chlorophyll-esrioceans.hub.arcgis.com).
Daily Chlorophyll-a values (left) and classified Algal bloom index values (right) offshore Southern California, United States (Source: NOAA, GEO Blue Planet, UNEP, Esri).