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Plant either eaten or decays, closed system. Methane does not return upstream only, river flows into ocean, open system. My argument supported by published ar

Plant either eaten or decays, closed system. Methane does not return upstream only, river flows into ocean, open system. My argument supported by published article and nice picture, look at sediments [1]. Your argument "calculated yearly is not yearly", maybe you should bring some citations, maybe it is you who do not understand what is described. [1] https://en.wikipedia.org/wiki/Ocean_storage_of_carbon_dioxide#Blue_carbon_capture_in_ocean https://en.wikipedia.org/wiki/Ocean_storage_of_carbon_dioxid...

Retric 6y ago
“First, very shallow coastal waters contribute around 50 percent of the total methane emissions from the ocean, despite making up only 5 percent of the ocean area. That's because methane can seep out of natural gas reservoirs along continental margins and can be produced biologically in anoxic (oxygen-depleted) sediments at the seafloor.” https://phys.org/news/2019-10-global-ocean-methane-emissions-dominated.html https://phys.org/news/2019-10-global-ocean-methane-emissions... Dams are collecting the exact same sediments that would end up in estuaries and as that article points out some of that is then turned into Methane. Natural methane is just part of the carbon cycle. It’s generally ignored in oversimplified explanations like you just linked.
- sergeykish 6y ago
  Thank you. Next sentence > In deep waters, methane is likely to be oxidized as it travels its long route from the seafloor to the atmosphere. Coastal waters emissions does not imply all biomass. Open system — what escapes to deep waters stays there. Quote above implies dam water is warmer.
  - Retric 6y ago
    The very next sentence is “But in shallow waters, there's a rapid route to the atmosphere and methane escapes before it is oxidized.” Most sediment collected by dams ends up there because it weighs more than water and so filters out as soon as the water stops flowing. As rivers reach the ocean that process generally produces vast and very shallow silt deposits. https://en.wikipedia.org/wiki/Estuary https://en.wikipedia.org/wiki/Estuary You can even read about what happens in dam removal when that same sediment flows down stream and ends up very near the surface. There are some very striking images of this processes when muddy flood water reaches the ocean. PS: Also by deep water their talking miles deep. Dead fish end up falling miles in most of the ocean.
    - sergeykish 6y ago
      I do not think researches do not understand sediments would deposit somewhere. That's obvious. There should be something else. Turbine gets water not from the surface. There was a project to extract enough methane to increase energy production. http://news.bbc.co.uk/2/hi/6638705.stm http://news.bbc.co.uk/2/hi/6638705.stm

Retric 6y ago

“First, very shallow coastal waters contribute around 50 percent of the total methane emissions from the ocean, despite making up only 5 percent of the ocean area. That's because methane can seep out of natural gas reservoirs along continental margins and can be produced biologically in anoxic (oxygen-depleted) sediments at the seafloor.” https://phys.org/news/2019-10-global-ocean-methane-emissions-dominated.html https://phys.org/news/2019-10-global-ocean-methane-emissions... Dams are collecting the exact same sediments that would end up in estuaries and as that article points out some of that is then turned into Methane. Natural methane is just part of the carbon cycle. It’s generally ignored in oversimplified explanations like you just linked.

sergeykish 6y ago
Thank you. Next sentence > In deep waters, methane is likely to be oxidized as it travels its long route from the seafloor to the atmosphere. Coastal waters emissions does not imply all biomass. Open system — what escapes to deep waters stays there. Quote above implies dam water is warmer.
- Retric 6y ago
  The very next sentence is “But in shallow waters, there's a rapid route to the atmosphere and methane escapes before it is oxidized.” Most sediment collected by dams ends up there because it weighs more than water and so filters out as soon as the water stops flowing. As rivers reach the ocean that process generally produces vast and very shallow silt deposits. https://en.wikipedia.org/wiki/Estuary https://en.wikipedia.org/wiki/Estuary You can even read about what happens in dam removal when that same sediment flows down stream and ends up very near the surface. There are some very striking images of this processes when muddy flood water reaches the ocean. PS: Also by deep water their talking miles deep. Dead fish end up falling miles in most of the ocean.
  - sergeykish 6y ago
    I do not think researches do not understand sediments would deposit somewhere. That's obvious. There should be something else. Turbine gets water not from the surface. There was a project to extract enough methane to increase energy production. http://news.bbc.co.uk/2/hi/6638705.stm http://news.bbc.co.uk/2/hi/6638705.stm