6 ms·

Heat resistant and anaerobic ? Years? Why so long ? /s https://xkcd.com/1732/ https://xkcd.com/1732/ (natural speed of changes vs. anthropocene) https://www.r

by myshpa 4y ago

Heat resistant and anaerobic ? Years? Why so long ? /s https://xkcd.com/1732/ https://xkcd.com/1732/ (natural speed of changes vs. anthropocene) https://www.researchgate.net/figure/The-trajectory-of-the-Anthropocene-The-Great-Acceleration-Source-Steffen-et-al-2015_fig1_344401109 https://www.researchgate.net/figure/The-trajectory-of-the-An... https://en.wikipedia.org/wiki/Great_Acceleration https://en.wikipedia.org/wiki/Great_Acceleration The "hockey stick" is just starting. - Marine life: Warmer sea temperatures can lead to changes in the distribution and behavior of marine species, with some moving to cooler waters or changing their migration patterns. This can also affect the growth and reproduction rates of different marine organisms, which can have cascading effects on the food chain. - Coral reefs: Coral reefs are highly sensitive to changes in sea temperature, and prolonged exposure to temperatures above 21 degrees Celsius can cause coral bleaching, which can lead to their death. This can have significant impacts on the many species that depend on coral reefs for food and habitat. - Ocean currents: Changes in sea temperature can affect ocean currents, which can in turn impact weather patterns and climate. Warmer sea temperatures can lead to more frequent and severe weather events such as hurricanes and typhoons. https://en.wikipedia.org/wiki/Thermohaline_circulation https://en.wikipedia.org/wiki/Thermohaline_circulation https://en.wikipedia.org/wiki/Atlantic_meridional_overturning_circulation https://en.wikipedia.org/wiki/Atlantic_meridional_overturnin... - Sea level rise: As sea temperatures rise, the water expands, contributing to sea level rise. This can lead to flooding and erosion in coastal areas and impact the livelihoods of people who depend on these areas for fishing and tourism. - Decreased solubility: As sea temperature increases, the solubility of oxygen in seawater decreases. This means that warmer water holds less dissolved oxygen than cooler water. Therefore, as sea temperatures rise, the amount of oxygen available for marine life decreases. - Increased stratification: Warmer water is less dense than cooler water, so as the sea temperature rises, the water column becomes more stratified, with warmer water sitting on top of cooler water. This can prevent oxygen-rich surface water from mixing with deeper water, leading to the formation of oxygen-depleted zones. - Algae blooms: Warmer sea temperatures can promote the growth of certain types of algae, such as harmful algal blooms. These blooms can consume large amounts of oxygen when they decompose, leading to oxygen-depleted zones in the surrounding water. - Oxygen-depleted zones, also known as hypoxic or anoxic zones, can have significant impacts on marine ecosystems. When oxygen levels become too low, many marine organisms, such as fish, shellfish, and crabs, can suffocate and die. This can have cascading effects on the food chain and lead to the loss of commercially important species. Additionally, the decomposition of dead marine organisms in these zones can release harmful gases such as hydrogen sulfide, which can be toxic to marine life and humans.

bamboozled 4y ago
That XKCD is amazing but absolutely terrifying, so sad.
- deleted 4y ago
  [deleted]
revelio 4y ago
Several of the possibilities you raise here are disproven by real world data. W.R.T. corals, claims of coral reefs being harmed by climate change have been discredited in recent years. Although scientists claimed for years that the corals were being severely harmed by emissions, 2022 had the highest coral cover in the GBR since records began in the mid 80s. It's confusing because the media reported several supposedly severe die-offs in the corals in the six years before 2022, but coral takes 5-10 years to regrow after a major die-off so those reports cannot have been correct. Coral bleaching is caused by sudden changes in temperature, but most bleachings don't seem to cause die-offs and it's the speed of change that seems to trigger it, not so much the absolute temperature. Sea level rise is small, constant over a much longer time period than the industrial era, and primarily caused by changes in the height of the land not the sea. That's why the Pacific islands that were supposedly in danger from climate change have actually grown over time, not shrunk. https://www.nature.com/articles/s41467-018-02954-1 https://www.nature.com/articles/s41467-018-02954-1 Finally, the hockey stick graphs that are so famous are all scientifically fraudulent, being based on techniques like dropping any input data that doesn't yield hockey stick graphs.
- myshpa 4y ago
  > claims of coral reefs being harmed by climate change have been discredited in recent years https://theconversation.com/record-coral-cover-doesnt-necessarily-mean-the-great-barrier-reef-is-in-good-health-despite-what-you-may-have-heard-188233 https://theconversation.com/record-coral-cover-doesnt-necess... "it’s more likely the reef is being dominated by only few species, as the report states that branching and plating Acropora species have driven the recovery of coral cover" "these same corals are often susceptible to wave damage, disease or coral bleaching and tend to go bust within a few years" "Without more information at the level of individual species, it is impossible to understand how much of the Great Barrier Reef has been lost, or recovered, since the last mass bleaching event" https://www.theguardian.com/environment/2022/aug/06/great-barrier-reefs-record-coral-cover-is-good-news-but-climate-threat-remains https://www.theguardian.com/environment/2022/aug/06/great-ba... "Dr Emslie, who leads the ... monitoring, says the rise in coral cover was expected, given the relatively benign conditions, but four bleaching events in seven years was uncharted territory." In some conservative media, the survey has been used to push arguments the reef is not under threat. “The naysayers can put their heads in the sand all they like, but the frequency of disturbances is going gangbusters,” says Emslie. Wachenfeld points out that scientists have never said the reef is dead. “Scientists have been ringing an alarm bell, not a funeral dirge,” he says. “The notion scientists have been misleading people is a nonsense.” He likens the reef’s resilience to a rubber band that can be stretched many times, but only so far before it snaps. “It’s hard to predict when that will happen, but it’s a bit like that with the reef,” he says. “We have a limited amount of time to slow and stop the warming. There is no way this resilience can last forever.” The rest I will leave for somebody else.

by myshpa 4y ago

bamboozled 4y ago

That XKCD is amazing but absolutely terrifying, so sad.

deleted 4y ago
[deleted]

revelio 4y ago

Several of the possibilities you raise here are disproven by real world data. W.R.T. corals, claims of coral reefs being harmed by climate change have been discredited in recent years. Although scientists claimed for years that the corals were being severely harmed by emissions, 2022 had the highest coral cover in the GBR since records began in the mid 80s. It's confusing because the media reported several supposedly severe die-offs in the corals in the six years before 2022, but coral takes 5-10 years to regrow after a major die-off so those reports cannot have been correct. Coral bleaching is caused by sudden changes in temperature, but most bleachings don't seem to cause die-offs and it's the speed of change that seems to trigger it, not so much the absolute temperature. Sea level rise is small, constant over a much longer time period than the industrial era, and primarily caused by changes in the height of the land not the sea. That's why the Pacific islands that were supposedly in danger from climate change have actually grown over time, not shrunk. https://www.nature.com/articles/s41467-018-02954-1 https://www.nature.com/articles/s41467-018-02954-1 Finally, the hockey stick graphs that are so famous are all scientifically fraudulent, being based on techniques like dropping any input data that doesn't yield hockey stick graphs.

myshpa 4y ago
> claims of coral reefs being harmed by climate change have been discredited in recent years https://theconversation.com/record-coral-cover-doesnt-necessarily-mean-the-great-barrier-reef-is-in-good-health-despite-what-you-may-have-heard-188233 https://theconversation.com/record-coral-cover-doesnt-necess... "it’s more likely the reef is being dominated by only few species, as the report states that branching and plating Acropora species have driven the recovery of coral cover" "these same corals are often susceptible to wave damage, disease or coral bleaching and tend to go bust within a few years" "Without more information at the level of individual species, it is impossible to understand how much of the Great Barrier Reef has been lost, or recovered, since the last mass bleaching event" https://www.theguardian.com/environment/2022/aug/06/great-barrier-reefs-record-coral-cover-is-good-news-but-climate-threat-remains https://www.theguardian.com/environment/2022/aug/06/great-ba... "Dr Emslie, who leads the ... monitoring, says the rise in coral cover was expected, given the relatively benign conditions, but four bleaching events in seven years was uncharted territory." In some conservative media, the survey has been used to push arguments the reef is not under threat. “The naysayers can put their heads in the sand all they like, but the frequency of disturbances is going gangbusters,” says Emslie. Wachenfeld points out that scientists have never said the reef is dead. “Scientists have been ringing an alarm bell, not a funeral dirge,” he says. “The notion scientists have been misleading people is a nonsense.” He likens the reef’s resilience to a rubber band that can be stretched many times, but only so far before it snaps. “It’s hard to predict when that will happen, but it’s a bit like that with the reef,” he says. “We have a limited amount of time to slow and stop the warming. There is no way this resilience can last forever.” The rest I will leave for somebody else.