Venice clearer water
In link of lockdown due to covid19 that reduce the movement of Venice’s boats including the 'vaporetti' or water buses, as well as cruise ships (reduction of human activity), these two photos ESA one took On April 2020 and the other on April 2019.
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This shows how water quality is affected by the limitation of human activities as The Italian government imposed a nationwide lockdown on the 9th of March 2020.
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The water now looks clearer because there is less traffic on the canals, allowing the sediment to stay at the bottom.
Venice clearer water
In link of lockdown due to covid19 that reduce the movement of Venice’s boats including the 'vaporetti' or water buses, as well as cruise ships (reduction of human activity), these two photos ESA one took On April 2020 and the other on April 2019.
​
This shows how water quality is affected by the limitation of human activities as The Italian government imposed a nationwide lockdown on the 9th of March 2020.
​
The water now looks clearer because there is less traffic on the canals, allowing the sediment to stay at the bottom.
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Chlorophyll A
The main source of oxygen in the water for the Marin life is the algae and planktons in the water. The measurements for their amount are by measuring the chlorophyll A.
“Chlorophyll is a light-harvesting pigment found in most photosynthetic organisms. In the ocean, phytoplankton all contain the chlorophyll pigment, which has a greenish color. The concentration of chlorophyll-a is used as an index of phytoplankton biomass. Changes in the amount of phytoplankton indicate the change in the productivity of the ocean and as marine phytoplankton capture almost an equal amount of carbon as does photosynthesis by land vegetation, it provides an ocean link to global climate change modeling. Chlorophyll concentration is also useful for studying the Earth’s climate system as it is playing an integral role in the Global Carbon Cycle.” (Earthdata Search: MODISAL2OC; OceanColor Web - Level 1&2 Browsers; OceanColor Web - Chlorophyll-a; NASA Earth Observations - Chlorophyll Concentration).
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Many human activities and waste like Sewage, Fertilizers, Pesticides, and Industrial wastes, so if these activities were limited the phytoplankton will have better chances in a higher capture rate of carbon dioxide into the ocean and help cool the planet.
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Going on the EOSDIS NASA world view, we captured an image of the concentration of the chlorophyll A, and we can see, in figure 1 with the date of 1st January 2020 and figure 2 with the date of 22ed May 2020, the contrast between the two images, in the more recent one, we can see more contrast as more green, yellow and orange are showing. This clearly shows how the limitation of the human activities affected the ocean, especially on the east side of North America which is one of the areas with the most cases of COVID-19.
Figure 1 1 JAN 2020
