sheawoodrow
sheawoodrow avatar

sheawoodrow

@sheawoodrow@kbin.social

A monkey wearing glasses is still a monkey.

ianbetteridge, to random
@ianbetteridge@writing.exchange avatar

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    @ordinal@mas.to avatar

    @ianbetteridge ah yes, email, that protocol where servers absolutely never maintain extensive blacklists or anything like that.

    I wonder whether it's appreciated how many instances are blocked just as standard on most mastodon actually.

    Lemmy and Kbin are great, but it's not a panacea. The protocol (ActivityPub) has faults. Also start looking into nostr

    From a technical standpoint, the protocol (ActivityPud) underlying Lemmy and Kbin has security and performance faults that make it inefficient. It's a great step towards decentralization but there is another alternative that I want to raise awareness of: Nostr....

    BootlegHermit,

    Meh, skimmed Coracle to see what it might be about... sure smells like crypto-bro in there.

    sheawoodrow, to Starwars

    If you're looking for a fun way to kill an afternoon, why not try a jigsaw puzzle? Buffalo Games has a great selection for all ages & dexterity levels. Chose from dozens of collections, including , , &

    https://buffalogamescom.sjv.io/c/2921645/1608129/18653?u=https%3A%2F%2Fbuffalogames.com%2Fstar-wars-the-arrival-of-lord-vader-1000-piece-jigsaw-puzzle%2F

    sheawoodrow, to random

    Watch: Baboons Hang on to Bridge for Dear Life to Avoid Lions

    https://i0.wp.com/lighthouse-eco.co.za/wp-content/uploads/2023/06/Baboons-hang-on-to-bridge-for-dear-life-to-avoid-lions.jpg?fit=800%2C450&ssl=1

    This troop of baboons found themselves stuck several feet in the air, surrounded by lions. With nowhere to go, they eventually outsmarted the lions in the funniest of ways!

    https://lighthouse-eco.co.za/b/2bt

    sheawoodrow, to random

    ‘There is no mercy!’: the young women swapping South Korea’s work culture for freediving

    https://i0.wp.com/lighthouse-eco.co.za/wp-content/uploads/2023/06/3685.webp?fit=1900%2C1140&ssl=1

    The remarkable haenyeo on Geoje Island believed their traditions were dying out. But then came the new recruits – refugees from the cities’ exhausting rat race

    https://lighthouse-eco.co.za/b/2bg

    sheawoodrow, to news

    Orca conflict with great white shark caught on camera

    https://i0.wp.com/lighthouse-eco.co.za/wp-content/uploads/2023/06/Orcasf-e1687159262512-1024x577-1.jpg?fit=1024%2C577&ssl=1

    Another predatory encounter between two orcas and a great white shark was caught on camera near Mossel Bay on Sunday morning.

    https://lighthouse-eco.co.za/b/2av

    sheawoodrow, to news

    ‘Tides Are Changing’: Meet the Winners of the UN’s 10th Annual World Oceans Day Photo Competition

    https://i0.wp.com/lighthouse-eco.co.za/wp-content/uploads/2023/06/1st-Place-Underwater-Seascapes-Andy-Schmid-1.webp?fit=1200%2C800&ssl=1

    Our world’s oceans are stunning, so what better way to capture their wide array of colors, personalities and awe-inspiring vastness than through the art of photography?

    https://lighthouse-eco.co.za/2023/06/20/tides-are-changing-meet-the-winners-of-the-uns-10th-annual-world-oceans-day-photo-competition/

    sheawoodrow, to random

    Himalayan glaciers melting 65 percent faster than previous decade: study

    https://i0.wp.com/lighthouse-eco.co.za/wp-content/uploads/2023/06/d7379a66b0944d05cb0554cdaeae1d66aa33b4d6.webp?fit=980%2C551&ssl=1

    Himalayan glaciers providing critical water to nearly two billion people are melting faster than ever before due to climate change, exposing communities to unpredictable and costly disasters, scientists warned Tuesday.

    -change

    https://lighthouse-eco.co.za/2023/06/20/himalayan-glaciers-melting-65-percent-faster-than-previous-decade-study/

    sheawoodrow, to news

    Oceans absorb 30% of emissions, driven by a huge carbon pump: Tiny marine animals are key to cycle, says study

    https://i0.wp.com/lighthouse-eco.co.za/wp-content/uploads/2023/06/oceans-absorb-30-of-em.jpg?fit=1356%2C668&ssl=1

    Home

    Credit: Julian Uribe-Palomino/IMOS-CSIROThe ocean holds 60 times more carbon than the atmosphere and absorbs almost 30% of carbon dioxide (CO₂) emissions from human activities. This means the ocean is key to understanding the global carbon cycle and thus our future climate.

    The Intergovernmental Panel on Climate Change (IPCC) uses earth system models to project climate change. These projections inform critical political, social and technological decisions. However, if we can’t accurately model the marine carbon cycle then we cannot truly understand how Earth’s climate will respond to different emission scenarios.

    In research published in the journal Communications Earth & Environment, we show that zooplankton, tiny animals near the base of the ocean food chain, are likely to be the biggest source of uncertainty in how we model the marine carbon cycle. Getting their impact on the cycle right could add an extra 2 billion tons to current models’ assumptions about annual carbon uptake by the ocean. That’s more carbon than the entire global transportation sector emits.

    Marine carbon cycling is a $3 trillion thermostat

    Roughly 10 billion tons of carbon are being released into the atmosphere each year. But the ocean quickly absorbs about 3 billion tons of these emissions, leaving our climate cooler and more hospitable. If we price carbon at the rate the IPCC believes is needed to limit warming to 1.5℃, this adds up to over A$3 trillion worth of emission reductions accomplished naturally by the ocean every year.

    However, we know the size of the ocean carbon sink has changed in the past, and even small changes can lead to big changes in the atmosphere’s temperature. Thus, we understand the ocean acts as a thermostat for our climate. But what controls the dial?

    Extensive geological evidence suggests microscopic marine life could be in control. Phytoplankton photosynthesize and consume as much CO₂ as all land plants.

    When phytoplankton die, they sink and trap much of their carbon deep in the ocean. It can remain there for centuries to millennia, locked away safely out of contact with the atmosphere.

    The ocean (dark green) is a major carbon sink that partly offsets emissions in the global carbon budget.
    Credit: Global Carbon Budget 2022, Friedlingstein et al, CC BY

    Any changes to the strength of this biological carbon pump will be felt in the atmosphere and will change our climate. Some have even proposed enhancing this biological pump by artificially fertilizing the ocean with iron to stimulate phytoplankton. It’s possible this could sequester as much as an extra 20% of our annual CO₂ emissions.

    Related posts:

    Right for the wrong reasons

    Despite its importance for the global climate and food production, there are large gaps in our understanding of how the marine carbon cycle is expected to change. Most earth system models differ in how the cycle’s major components will respond to a changing climate. Models simply can’t agree on what will happen to:

    • net primary production—the carbon consumed by phytoplankton resulting in growth of marine plants at the base of the food web
    • secondary production—zooplankton growth, which is an indicator for fisheries, since fish eat zooplankton
    • export production—the biological pump of carbon transferred to the deep sea.

    To diagnose what might be going wrong, we compared the marine carbon cycle in 11 IPCC earth system models. We found the largest source of uncertainty is how fast zooplankton consume their phytoplankton prey, known as grazing pressure.

    A diagram of the natural biological carbon pump and how iron fertilisation could artificially enhance it.
    Credit: Rohr et al (2019), Author provided

    Models differ hugely in their assumptions about this grazing pressure. Even if zooplankton were exposed to the exact same amount of phytoplankton, the highest assumed grazing rate would be almost 100 times as fast as the slowest rate.

    This is because some models effectively assume the ocean is filled entirely with slow-grazing shrimp. Others assume it is teeming exclusively with microscopic, but rapidly grazing ciliates. In reality, neither is true.

    Models must make up for such large differences in zooplankton grazing by making additional assumptions about how fast phytoplankton grow and how quickly zooplankton die. Together, these differences can be balanced in a way that allows most models to simulate the present-day amount of carbon consumed by phytoplankton and transferred to the deep sea.

    However, that is only because we can observe what those values should be. We can then tune models until we ensure they get the right answer.

    Yet, even though our best models can admirably recreate the present-day ocean, they do so for different reasons and with dramatically different assumptions about the role of zooplankton. This means these models are built with fundamentally different machinery. When used to test future emissions scenarios, they will project fundamentally different outcomes.

    We cannot know which projections are correct unless we know the true role of zooplankton.

    Differences in prominent models’ estimates of the amount of zooplankton at different latitudes.
    Credit: Adapted from Rohr et al (2023), Author providedTiny plankton with a big impact

    We ran a sensitivity experiment to show how small changes in zooplankton grazing can dramatically alter marine carbon cycling. We considered two sets of experiments, one control and one in which we increased both zooplankton grazing rates and phytoplankton growth rates, such that both were tuned to the exact same total carbon consumption by phytoplankton.

    This increase in how fast zooplankton can graze was only a fraction of the difference between assumed grazing rates seen across IPCC models. Despite this, we found even this small increase led to a huge difference in the percentage of carbon consumed by phytoplankton that was eventually exported to depth and transferred up the food chain.

    Ocean carbon storage increased by 2 billion tons per year. Zooplankton carbon consumption increased by 5 billion tons.

    From a climate perspective, that is double the maximum theoretical potential of iron fertilization. From a fisheries perspective, that leads to a 50% increase in the size of the global zooplankton population on which many fish feed. This matters for global food supply as the ocean feeds 10% of the global population.

    This work shows we must improve both our understanding and modeling of zooplankton. With limited resources and an immense ocean, we will never have enough observations to build perfect models. However, new technologies for measuring zooplankton are making it easier to make autonomous, high-resolution measurements of many important variables.

    We must make a concerted effort to leverage these new technologies to better understand the role of zooplankton in the marine carbon cycle. We will then be able to reduce uncertainties about future climate states, advance our ability to assess marine-based CO₂ removal, and improve global fisheries projections.

    Source:

    Tyler Rohr, Anthony Richardson and Elizabeth Shadwick at The Conversation via phys.org

    -change

    https://lighthouse-eco.co.za/?p=9316

    sheawoodrow, to random

    Some of the most intense marine heat increases on Earth have developed in seas around the UK and Ireland, the European Space Agency (Esa) says.

    https://lighthouse-eco.co.za/2023/06/19/climate-change-sudden-heat-increase-in-seas-around-uk-and-ireland/

    GuyFleegman,

    One of the most annoying things about Mastodon during the Twitter migration at the beginning of this year was that the only thing Mastodon wanted to talk about was "the Birdsite."

    It sure would be nice if we could get through that phase of the Reddit migration at a vastly accelerated pace.

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