Is the ocean broken?

Discussion in 'All Things Boats & Boating' started by daiquiri, Oct 24, 2013.

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  1. ImaginaryNumber
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    ImaginaryNumber Imaginary Member

    40°C summer temperatures could be common in UK by 2100

    A stark warning about the kind of summer that could become routine in the UK by the end of this century has been issued in a new study by the country’s Met Office.

    They found that if global greenhouse gas emissions continue to rise, temperatures exceeding 40°C (104°F) could be reached somewhere in the UK every three-and-a-half years by 2100.

    While traditionally warmer climes have adapted over time to soaring summer temperatures, the UK is not prepared to handle these kinds of heatwaves.

     
  2. hoytedow
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    6f8b4c684aab7669.jpeg The cold waves are the real threat.
     
  3. Will Gilmore
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    Will Gilmore Senior Member

    Ha ha ha ha!
    I know why I live here. It's because people don't like living where the air hurts their face and I don't like living where the rules of a high density population, like Floridian Condo or gated community, rules and regulations interfere with the freedom to do this 20200516_161417.jpg
    Or this 20161003_162016.jpg
    You know, live as you choose.

    -Will (Dragonfly)
     
  4. hoytedow
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    Nice group.
     
  5. hoytedow
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  6. Will Gilmore
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    Will Gilmore Senior Member

    Why would the deep ocean be warming? Could it be that gravity has something to do with it? Don't forget, not only do the seasonal changes affect the angle of sunlight on the surface, but they also affect the direction of gravitational pull. Maybe something hot and heavy is tumbling around down there?! After all, it's not AGW or even sunspots that causes volcanic activity.

    -Will (Dragonfly)
     
  7. hoytedow
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    Tidal forces(Sun and Moon), so gravity, cause volcanism.
     
  8. ImaginaryNumber
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    ImaginaryNumber Imaginary Member

    Tidal forces don't cause volcanism, but it certainly can affect volcanism, as can climate change.

    Seasonality of volcanic eruptions
    Abstract

    [1] An analysis of volcanic activity during the last three hundred years reveals that volcanic eruptions exhibit seasonality to a statistically significant degree. This remarkable pattern is observed primarily along the Pacific “Ring of Fire” and locally at some individual volcanoes. Globally, seasonal fluctuations amount to 18% of the historical average monthly eruption rate. In some regions, seasonal fluctuations amount to as much as 50% of the average eruption rate. Seasonality principally reflects the temporal distribution of the smaller, dated eruptions (volcanic explosivity index of 0–2) that dominate the eruption catalog. We suggest that the pattern of seasonality correlates with the annual Earth surface deformation that accompanies the movement of surface water mass during the annual hydrological cycle and illustrate this with respect to global models of surface deformation and regional measurements of annual sea level change. For example, seasonal peaks in the eruption rate of volcanoes in Central America, the Alaskan Peninsula, and Kamchatka coincide with periods of falling regional sea level. In Melanesia, in contrast, peak numbers of volcanic eruptions occur during months of maximal regional sea level and falling regional atmospheric pressure. We suggest that the well‐documented slow deformation of Earth's surface that accompanies the annual movements of water mass from oceans to continents acts to impose a fluctuating boundary condition on volcanoes, such that volcanic eruptions tend to be concentrated during periods of local or regional surface change rather than simply being distributed randomly throughout the year. Our findings have important ramifications for volcanic risk assessment and volcanoclimate feedback mechanisms.

    ^^^^^^^^^^^^^^^^^^^^
    Get Ready for More Volcanic Eruptions as the Planet Warms
    Throughout its history Earth has gone through periods of massive natural climate change such as entering and leaving ice ages. Scientists have noted volcanic eruptions tended to increase as glaciers melted. In a recent study published in Geology researchers looked at smaller-scale changes in glacial coverage to see if these incremental differences had any effect.


    When the scientists compared the volcanic record with glacial coverage, they found the number of eruptions indeed dropped significantly as the climate cooled and ice expanded. “....“This seems to overlap with a time where there’s cold climate conditions, which would have favored glacial advance in Iceland.” He says his team observed an approximately 600-year lag between when glaciers advanced and volcanic activity diminished. “That’s because it takes a long time to grow ice masses,

    When glaciers expand, all that ice puts immense pressure on Earth’s surface. “It can affect magma flow and the voids and gaps in the Earth where magma flows to the surface as well as how much magma the crust can actually hold,” Swindles says. When glaciers retreat, the pressure lifts and volcanic activity surges. “After glaciers are removed the surface pressure decreases, and the magmas more easily propagate to the surface and thus erupt.”
     
  9. Will Gilmore
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    Will Gilmore Senior Member

    I think they have it exactly backwards. They attribute increased volcanic activity to warning surface temperatures that melt ice, yet...
    Why would he not conclude that the return of ice was due to the decrease of volcanic activity? Because it would then follow that the loss of ice was due to the increase of volcanic activity.

    They have identified large melted voids under the polar ice. One I remember reading about was reported to be the size of Manhatten, and they don't suggest that geothermal activity is the cause?

    What causes the movement of continental plates? Certainly not climate induced winds. No, there is an astronomical amount of energy under our feet and pulling on us from the Sun and the moon.

    Unless I'm misinterpreting the above article.

    -Will (Dragonfly)
     
  10. ImaginaryNumber
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    ImaginaryNumber Imaginary Member

    If I understand the article correctly, the glaciers started increasing first, then the volcanic activity diminished. So it wouldn't make sense that the decrease in volcanic activity was driving the increase in ice, would it?
     
  11. hoytedow
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    Of course tides cause volcanism.
     
    Last edited: Oct 20, 2020
  12. hoytedow
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    It's the rubbing makes it hot.
     
  13. ImaginaryNumber
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    ImaginaryNumber Imaginary Member

    The World’s Largest Tropical Wetland Has Become an Inferno

    This year, roughly a quarter of the vast Pantanal wetland in Brazil, one of the most biodiverse places on Earth, has burned in wildfires worsened by climate change. The wetland, which is larger than Greece and stretches over parts of Brazil, Paraguay and Bolivia, also offers unseen gifts to a vast swath of South America by regulating the water cycle upon which life depends.

    [​IMG]
     
  14. hoytedow
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  15. ImaginaryNumber
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    ImaginaryNumber Imaginary Member

    More likely carelessness.

    Fires Char the Pantanal https://earthobservatory.nasa.gov/images/147269/fires-char-the-pantanal

    Though it is impossible to determine from satellite data the precise cause of every fire, experts who study South America say that many of the large dry season events this year were likely triggered by human activities. Fires are routinely used by farmers in the region to clear vegetation from new and existing pastures, explained Renata Libonati of the Federal University of Rio de Janeiro. Burning trash is also common, and fisherman regularly light campfires. Normally such activities would create small, short-lived fires that are barely visible to satellite sensors like MODIS. But in dry conditions, fires can easily escape and spread.​
     
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