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Aqua Science Publication Highlights

June 2023

Atmospheric nourishment of global ocean ecosystems

T.K. Westberry, et al., Atmospheric noursiment of global ocean ecysystems. Science 380, 515-519 (2023). DOI: 10.1126/science.abq5252

A new study by Westberry et al. published in Science titled, 'Atmospheric Nourishment of Global Ocean Ecoystems', detects the extent and magnitude of dust-deposition on the oceans globally. Dust-deposited on the ocean provides nutritents for phytoplankton. This new dataset was produced using Aqua MODIS data. 

 

Figure. Model-based dust deposition and satellite-observed chlorophyll concentration over the global ocean.
(A) Average GEOS dust deposition rates (milligrams per square meter per day) over the period 2003 to 2016. (B) Average MODIS-Aqua chlorophyll concentration (milligrams per cubic meter) over the period 2003 to 2016. Red boxes outline a single 5°-by-10° grid cell centered on 42.5°N, 45°W, whose time series are shown in subsequent panels. (C) Fourteen-year time series of 4-day average dust deposition (thin black line) over red-outlined region in (A). Also shown is a repeating average annual cycle of dust deposition (solid red line) for the same location. (D) Similar to (C), but for MODIS-Aqua chlorophyll concentration (milligrams per cubic meter).

 

 

 

March 2023

Coastal phytoplankton blooms expand and intensify in the 21st century

Dai, Y.,Yang, S., Zhao, D. et al. Coastal phytoplankton blooms expand and intensify in the 21st century. Nature 615, 280–284 (2023). https://doi.org/10.1038/s41586-023-05760-y

 

Figure: MODIS-dectected bloom count within certian years for several coastal regions with frequency reported blooms. The MODIS observational year is annotated within each panel, and overlaid points indicate in situ recorded harmful algal bloom events from the Harmful Algae Event Database (HAEDAT) within the same year. The lower right panel shows the locations of all the HAEDAT records that were used for algorithm validations in this study, which also demonstrates the increase in sampling effort in the most recent years.

A new study, published in Nature, found that globally coastal algae blooms are increasing in frequency and extent between 2003-2020. These blooms were detected by a algae bloom detection dataset, which was produced using 0.76 million MODIS-Aqua images. While some algae blooms are beneficial providing food to fisheries and the ecosystems worldwide, other blooms called 'Harmful Algae Blooms' are becoming more prevalaent and can put toxins in the food chain, affecting animals and humans, and can depelete the oxygen in areas creating 'Dead Zones' that can kill many species. This daily coastal phytoplanton bloom dataset is important because it can be used to inform future management and policy actions and provides locations and timing of these algae blooms.