this post was submitted on 06 Oct 2024
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Climate - truthful information about climate, related activism and politics.

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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

Recommended actions to cut greenhouse gas emissions in the near future:

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Humanity has missed its chance of keeping global warming below 1.5C and it will take “heroic efforts” to stay below 2C this century, the scientist leading the global effort to understand climate change has warned.

Jim Skea, chairman of the Intergovernmental Panel on Climate Change (IPCC), said a failure to sufficiently curb carbon emissions had left the world on track to warm by 3C by 2100. This average masks variations between land and sea, with western Europe and the UK facing even greater warming – perhaps as much as 5C by the end of the century.

“We are potentially headed towards 3C of global warming by 2100, if we carry on with the policies we have at the moment,” said Skea...

The Met Office has tried to project the UK impacts. By 2070, it says, winters will be up to 4.5C warmer but 30pc wetter, meaning more flooding. Summer will be up to 6C warmer, with frequent droughts and surging numbers of heat-related deaths.

Skea said: “It’s very clear climate change is no longer decades in the future. It’s very obvious it’s happening now, so we need to adapt.”

“One of the biggest risks in many regions will come from the combination of heat and humidity.

“It will just be difficult to live and to work outside. In some parts of the world, that will be really a showstopper for some kinds of economic activity.”

Europe faces some of the biggest challenges. Other scientists have predicted Scotland becoming a centre for wineries, that Poland will struggle to grow staple crops such as potatoes and Italy might no longer be able to cultivate durum wheat – used to make pasta.

Skea warned of deserts appearing in southern Europe. He said: “The whole of Europe is vulnerable and especially the Mediterranean. We are already seeing desertification taking place, not only in North Africa, but some of the southern margins of Europe, like Greece, Portugal and Turkey.”

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[–] luciole@beehaw.org 11 points 4 weeks ago (1 children)

I hate the "too late" discourse. Best time to curb emissions is the past, next best time is now. The fastest we act, the better off we’ll be.

I have this nagging feeling that this posture is just preparing public opinion for geoengineering, the last grift before collapse. Maybe its cause as well. Oh and fatalism is going to help undermine current decarbonizing efforts too, so win-win for big money.

[–] CazzoneArrapante@lemm.ee 3 points 4 weeks ago

This. We also have to find a way to actively reverse the damage.