Regional products for the Baltic Sea using MERIS data

Krawczyk, Harald; Neumann, Andreas; Gerasch, Birgit; Walzel, Thomas

doi:10.1080/01431160600815558

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…Several studies have demonstrated the advantage of various satellite sensors for monitoring Chl-a concentration. In the Baltic Sea and the Black Sea or their tributaries, the Medium Resolution Imaging Spectrometer (MERIS) on-board Envisat at 300 m [15][16][17][18], the Moderate Resolution Imaging Spectroradiometer (MODIS) on-board Aqua and Terra at 1000 m [19,20] were explored for Chl-a concentration mapping. For this, special attention is given to the recently launched Ocean and Land Colour Instrument (OLCI) on-board Sentinel-3 at 300 m and the MultiSpectral Instrument (MSI) on-board Sentinel-2 at 10, 20, or 60 m, depending on the bands used [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Earth Observation-Based Cyanobacterial Bloom Index Testing for Ecological Status Assessment in the Open, Coastal and Transitional Waters of the Baltic and Black Seas

Vaičiūtė,

Sokolov,

Bučas

et al. 2024

Remote Sensing

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The use of Earth Observation (EO) for water quality monitoring has substantially raised in the recent decade; however, harmonisation of EO-based indicators across the seas to support environmental policies is in great demand. EO-based Cyanobacterial Bloom Index (CyaBI) originally developed for open waters, was tested for transitional and coastal waters of the Lithuanian Baltic Sea and the Ukrainian Black Sea during 2006–2019. Among three tested neural network-based processors (FUB-CSIRO, C2RCC, standard Level-2 data), the FUB-CSIRO applied to Sentinel-3 OLCI images was the most appropriate for the retrieval of chlorophyll-a in both seas (R2 = 0.81). Based on 147 combined MERIS and OLCI synoptic satellite images for the Baltic Sea and 234 for the Black Sea, it was shown that the CyaBI corresponds to the eutrophication patterns and trends over the open, coastal and transitional waters. In the Baltic Sea, the cyanobacteria blooms mostly originated from the central part and the outflow of the Curonian Lagoon. In the Black Sea, they occurred in the coastal region and shelf zone. The recent decrease in bloom presence and its severity were revealed in the areas with riverine influence and coastal waters. Intensive blooms significantly enhanced the short-term increase in sea surface temperature (mean ≤ 0.7 °C and max ≤ 7.0 °C) compared to surrounding waters, suggesting that EO data originating from thermal infrared sensors could also be integrated for the ecological status assessment.

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