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18821
From: Lurker, [DNS_Address]
Subject: Climate out of control
URL: Out of control
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I give the entire human race around 3 to 4 years before they are functionally extinct. Good link here; front page headlines on the Guardian newspaper today. amp.theguardian.com/environment/2023/oct/05/gobsmackingly -bananas-scientists-stunned-by-planets-record-september- heat |
18825
From: Chuckles, [DNS_Address]
Subject: Re: Climate out of control
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More detailed explanation of what is happening with the climate. I believe I already posted this a while back. |
18826
From: Lurker, [DNS_Address]
Subject: Re: Climate out of control
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Well, there are many sites; on Facebook, too, eg, "NearternHumanExtinction". here is a good page, see link. https://arctic-news.blogspot.com/p/extinction.html |
18828
From: Chuckles, [DNS_Address]
Subject: Re: Climate out of control
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We'll see in a few years what direction our climate is heading, warmer or cooler. Here's a link to the University of Rochester about Methane not being a immediate threat to the climate. |
Responses:
[18829]
18829
From: Eve, [DNS_Address]
Subject: Re: Climate out of control
URL: https://www.reddit.com/r/climate/comments/tdqs17/how_big_a_threat_is_arctic_methane_exactly/
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It's debated amongst researchers and there is no certainty in regards. |
Responses:
None
18827
From: akira, [DNS_Address]
Subject: Seafloor methane tipping point reached
URL: https://arctic-news.blogspot.com/2023/09/seafloor-methane-tipping-point-reached.html
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clipped from your link: FRIDAY, SEPTEMBER 15, 2023 Seafloor methane tipping point reached The bold black line at the top of the image below, adapted from Climate Reanalyzer, shows extremely high sea surface temperatures up to September 13, 2023, much higher than in any previous year on record. The image below, created with NASA data, shows why these extremely high sea surface temperatures are so worrying. The image shows monthly mean global surface temperature anomalies (open ocean) vs 1901-1930. The ochre trend, based on January 1900-August 2023 data, indicates the latent heat tipping point was crossed in 2021 and the seafloor methane tipping point could be crossed in 2033. The red trend, based on August 2008-August 2023 data and better reflecting variables such as El Niño, indicates that the seafloor methane tipping point could be crossed late 2023. Data show the seafloor methane tipping point was reached in August 2023. The latent heat tipping point is estimated to correspond with a sea surface temperature anomaly of 1°C above the long term average, 1901-1930 on the above image, as discussed in earlier posts such as this one. Sea ice constitutes a latent heat buffer, consuming incoming heat as it melts. While the ice is melting, all energy (at 334 J/g) goes into changing ice into water and the temperature remains at 0°C (273.15K or 32 °F). Once all ice has turned into water, all subsequent energy goes into heating up the water, and will do so at 4.18 J/g for every 1°C the temperature of the water rises. Once Arctic sea ice has become very thin, ocean heat that was previously consumed by melting the sea ice, no longer gets consumed by melting of the sea ice, and further incoming heat instead gets absorbed by the Arctic Ocean, rapidly pushing up the temperature of the water of the Arctic Ocean. The latent heat tipping point has meanwhile been crossed. Loss of this buffer is linked to the seafloor methane tipping point, i.e. the point where additional heat reaches the seafloor and destabilizes hydrates contained in sediments at the seafloor. This tipping point comes with multiple self-reinforcing feedback loops, such as explosive growth in methane volume setting off further destabilization, rapid rise of Arctic temperatures, loss of permafrost and loss of albedo, and release of further greenhouse gases. Crossing of the seafloor methane tipping point will occur later than crossing of the latent heat tipping point, i.e. the seafloor methane tipping point corresponds with a higher ocean temperature anomaly, estimated to correspond with a sea surface temperature anomaly of 1.35°C above the long term average. The current situation is particularly precarious in the Arctic, as the North Atlantic Ocean is very hot and the Gulf Stream keeps pushing hot water toward the Arctic Ocean, while Arctic sea ice has become very thin and the latent heat tipping point has been crossed. As the temperature of the Arctic Ocean keeps rising, more heat can reach sediments located at the seafloor, since much of the Arctic Ocean is very shallow and sediments at the seafloor of the Arctic Ocean can contain vast amounts of methane. The danger is that additional heat will destabilize hydrates in these sediments, leading to explosive eruptions of methane, as its volume increases 160 to 180-fold when leaving the hydrates, and resulting in huge eruptions of methane both from the destabilizing hydrates and from methane that is present in the form of free gas underneath the hydrates. |
Responses:
None
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