Sensing the "death" through AHVRR, Copernicus C3S and Sentinel-2 remote sensed data and ground truthing work in a portion of the seabeds bordering the Circeo Man and Biosphere Reserve (Latium coast, Central Tyrrhenian Sea)

The sea snow phenomenon is widespread all over the world. The aggregates come up as a result of prolonged warm temperatures, water column stratification and persistent calm weather frequently occurring especially in the warmest seasons and is commonly more relevant in areas characterized by high nutrient concentrations both in the water column and on the bottom. The use of a combined approach relying both on remote sensed data and a field-based ground truth approach allowed to quantify and assess the extent of this phenomenon in a highly-frequented marine area bordering the "Circeo Man and Biosphere Reserve".