WTF!!!No Bondi Beach? No Maroubra beach? No Manly beach?

Discussion in 'Earth Science' started by paddoboy, Mar 2, 2020.

  1. paddoboy Valued Senior Member

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    https://phys.org/news/2020-03-world-beaches.html
    Half of world's beaches could vanish:

    Climate change and sea level rise are currently on track to wipe out half the world's sandy beaches by 2100, researchers warned Monday.

    Even if humanity sharply reduces the fossil fuel pollution that drives global warming, more than a third of the planet's sandy shorelines could disappear by then, crippling coastal tourism in countries large and small, they reported in the journal Nature Climate Change.

    "Apart from tourism, sandy beaches often act as the first line of defence from coastal storms and flooding, and without them impacts of extreme weather events will probably be higher," lead author Michalis Vousdoukas, a researcher at the European Commission's Joint Research Centre, told AFP.

    more at link....
    https://www.nature.com/articles/s41558-020-0697-0
    Sandy coastlines under threat of erosion:
    Abstract
    Sandy beaches occupy more than one-third of the global coastline1 and have high socioeconomic value related to recreation, tourism and ecosystem services2. Beaches are the interface between land and ocean, providing coastal protection from marine storms and cyclones3. However the presence of sandy beaches cannot be taken for granted, as they are under constant change, driven by meteorological4,5, geological6 and anthropogenic factors1,7. A substantial proportion of the world’s sandy coastline is already eroding1,7, a situation that could be exacerbated by climate change8,9. Here, we show that ambient trends in shoreline dynamics, combined with coastal recession driven by sea level rise, could result in the near extinction of almost half of the world’s sandy beaches by the end of the century. Moderate GHG emission mitigation could prevent 40% of shoreline retreat. Projected shoreline dynamics are dominated by sea level rise for the majority of sandy beaches, but in certain regions the erosive trend is counteracted by accretive ambient shoreline changes; for example, in the Amazon, East and Southeast Asia and the north tropical Pacific. A substantial proportion of the threatened sandy shorelines are in densely populated areas, underlining the need for the design and implementation of effective adaptive measures.



     
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  3. paddoboy Valued Senior Member

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    The Sydney basin alone has over 50 surfing beaches, three of which I have listed.
    Maroubra:

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    Bondi:

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    Manly:

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  5. LaurieAG Registered Senior Member

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  7. Jeeves Valued Senior Member

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    How could you not have known this?
    And that's the least of it. much worse.
     
  8. paddoboy Valued Senior Member

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    Who said I didn't know about this?
    And I have also posted in the past, on either this or another forum, re rising sea levels and Pacific Islands.
     
  9. Write4U Valued Senior Member

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    We won't need to go to the sea anymore, it'll come to us.
     
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  10. paddoboy Valued Senior Member

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  11. Jeeves Valued Senior Member

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    Then why this now?
     
  12. paddoboy Valued Senior Member

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    How about the date of the article@!
    MARCH 2, 2020
     
  13. Jeeves Valued Senior Member

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    Yes, I saw that in big letters. But it doesn't say anything we haven't known for years.
    My question was:
    Why post this now?
    Is there something new to discuss?
     
  14. paddoboy Valued Senior Member

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    Just to alleviate your concern, the article I previously posted was on another forum.
    https://theconversation.com/sea-lev...n-the-pacific-first-scientific-evidence-58511
    "Sea-level rise, erosion and coastal flooding are some of the greatest challenges facing humanity from climate change.

    Recently at least five reef islands in the remote Solomon Islands
    have been lost completely to sea-level rise and coastal erosion, and a further six islands have been severely eroded.

    These islands lost to the sea range in size from one to five hectares. They supported dense tropical vegetation that was at least 300 years old. Nuatambu Island, home to 25 families, has lost more than half of its habitable area, with 11 houses washed into the sea since 2011.

    This is the first scientific evidence, published in Environmental Research Letters, that confirms the numerous anecdotal accounts from across the Pacific of the dramatic impacts of climate change on coastlines and people."
    more at link....
    and a more recent one.....
    https://phys.org/news/2018-04-low-lying-atoll-islands-uninhabitable-mid-21st.html
    "Sea-level rise and wave-driven flooding will negatively impact freshwater resources on many low-lying atoll islands in such a way that many could be uninhabitable in just a few decades. According to a new study published in Science Advances, scientists found that such flooding not only will impact terrestrial infrastructure and habitats, but, more importantly, it will also make the limited freshwater resources non-potable and, therefore, directly threaten the sustainability of human populations."
    <<<<<<<<<<<<<<<<<>>>>>>>>>>>>>

    I'll also alleviate any doubts you may have with regards to my interests and concerns with the Pacific Islands and Islanders, by informing you that I also have a second abode in Fiji, and have been lucky enough to visit many Pacific Islands, some for extended stays. Let me list them.....The Galapagos Islands,....Santa Cruz, Isabela, and San Cristobal. The Marquesas Islands....Hiva oa, Nuku Hiva and Fatu Hiva. The Tuamoto Archipelago....Manihi Atoll, Rangiroa.
    Western Samoa,...Apia, American Samoa...Pago Pago. Cook Islands, Raratonga, Aitutaki. Tonga, Nukualofa. Fiji, Viti Levu, Vanua Levu, Beqa, Kadavu, Molake, Levuka, Koro. Lord Howe Island. Norfolk Island.
     
  15. Jeeves Valued Senior Member

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    I have no doubts. And you lack the power to alleviate any of my concerns.
    I simply inquired what new aspect of the situation you wished to discuss at this present time.
    WTF!!! in the headline might indicate a certain urgency, if not, as I initially supposed, surprise.
     
  16. paddoboy Valued Senior Member

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    I'm sure you'll work it out in time.
    In the meantime life goes on....and on.

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  17. paddoboy Valued Senior Member

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    Obviously its a new article dated 2nd March. And obviously to keep people mindful of what is occurring. But if it fails to interest you, why post, or read...Find something that interests you.
     
  18. paddoboy Valued Senior Member

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    https://phys.org/news/2020-03-early-earth-waterworld.html
    Early Earth may have been a 'waterworld'
    Kevin Costner, eat your heart out. New research shows that the early Earth, home to some of our planet's first lifeforms, may have been a real-life "waterworld"— without a continent in sight.

    The study, which appears March 2 in Nature Geoscience, takes advantage of a quirk of hydrothermal chemistry to suggest that the surface of Earth was likely covered by a global ocean 3.2 billion years ago. It may even have looked a bit like the post-apocalyptic, and land-free, future imagined in Costner's infamous film Waterworld.

    The group's findings could help scientists to better understand how and where single-cell organisms first emerged on Earth, said Boswell Wing, a coauthor of the research.
    more at link....
     
  19. Jeeves Valued Senior Member

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    Okay then.
     
  20. Write4U Valued Senior Member

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    The octopus is undoubtedly one of those creatures which evolved in deep ocean. It is mollusk, descendant of a sea slug, but it has some remarkable properties not found on land. You might say it is a separately evolved earth alien.
    For one, it might be the smartest species of non-mammal ocean dwellers .

    Ten Curious Facts About Octopuses
    https://www.smithsonianmag.com/science-nature/ten-curious-facts-about-octopuses-7625828/
     
  21. Xelasnave.1947 Valued Senior Member

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    Can we domesticate them and put them to work in underwater factories assembling something.
    Alex
     
  22. Write4U Valued Senior Member

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    As I said, these creatures are aliens in an alien world. You want to put your factories between 1000-2000 ft down in the ocean? That where the giant squid dwell and occasionally battle sperm whales who have a rite of passage by defeating and killing a giant squid. Sucker marks on a sperm whale are badges of honor and masculinity.
    You want some sperm whale come through your underwater factory on his quest for glory?

    Besides, octopuses are the greatest escape artists in the world. There is no way to keep them as slaves, they'll steal everything in sight and use it for building their own homes.

    And if you punish them by hacking off a tentacle, they'll just grow another one....

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    Lets stick with dolphins who make great underwater delivery boys. The military use them to attach bombs to ship's hulls. Maybe we can make them deliver mail to underwater facilities. They work cheap, 5 fish and a couple of loaves of bread......

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    Last edited: Mar 4, 2020
  23. Xelasnave.1947 Valued Senior Member

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    That approach is used by some humans.
    Alex
     
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