Am 17. November lag die Oberflächentemperatur der Erde zum ersten Mal 2° über dem vorindustriellen Durchschnitt. Der Philosoph Patrice Maniglier schlägt vor, schon 2023 oder das Jahr, an dem die 2°-Grenze dauerhaft überschritten werden wird, zum Beginn einer neuen Ära zu erklären, nämlich der des „großen Bankrotts“. https://www.liberation.fr/idees-et-debats/tribunes/sommes-nous-en-2024-ou-en-lan-i-du-rechauffement-climatique-20240104_NPIEAITYHVE6RAODCQ6UEDZV3Y/

Das neueste Update zum Global Carbon Budget ergibt, dass die CO2-Emissionen sich auf einem Rekordhoch Bewegungen. Der Anstieg hat sich leicht verlangsamt. 2023 lagen die Emissionen aus fossilen Quellen bei 36,8 Gt CO2 und damit etwa 1,1% über denen des Vorjahres. Mit 50% Wahrscheinlichkeit wird die 1,5°-Grenze in etwa 7 Jahren dauerhaft überschritten. https://www.derstandard.de/story/3000000198140/co2-emissionen-erreichen-neuen-hoechststand

Global Carbon Budget 2023: https://globalcarbonbudget.org/carbonbudget2023/

• for: climate crisis - resource flow, carbon budget - resource flow, carbon budget - resource redistribution

• comment

  • This is really a major change in the way resource flows
  • The high consuming countries and individuals need to drop their consumption drastically and give those to the decarbonization effort and to the disenfranchised who need to be uplifted to a state of wellbeing

Für den Zuwachs sind vor allem China und Indien verantwortlich. In Europa haben die Emissionen um 7,4, in den USA um 3% abgenommen. Eine große Rolle spielten die um fast 12% gestiegenen Emissionen der Luftfahrt https://www.theguardian.com/environment/2023/dec/05/global-carbon-emissions-fossil-fuels-record

• for: stats - oil and gas industry - fight for survival

• stats: oil and gas industry - fight for survival

  • competing oil producers will have to reach an agreement on who has the right to produce the remaining carbon budget
  • 24 million barrels a day are still produced in a 1.5 Deg C scenario but are largely uncombusted
    • 75 % of that will be used in petrochemical and other industry
    • 920 billion cubic meters of natural gas
      • 50% of this for hydrogen production

• for: carbon budget - Alberta, carbon-constrained world - Alberta's future

Einer neuen Studie zufolge liegt das CO2 Budget, mit dem sich das 1,5 Grad Ziel mit wenigstens 50% Wahrscheinlichkeit noch erreichen ließe, bei 250 Milliarden Tonnen. Es ist damit nur halb so hoch, wie bisher angenommen. Bei der von den UN vorangetriebenen Halbierung der Emissionen bis 2030 liege die Chance bei maximal 40%. https://www.theguardian.com/environment/2023/oct/30/climate-crisis-carbon-emissions-budget

Studie: https://www.nature.com/articles/s41558-023-01848-5

• for: carbon budget - underestimate, IPCC - underestimate, 1.5Deg C - underestimate, question, question - revise 1.5 Deg C target downwards?

• highlight

  • the 1.5 Deg C target does not account for cascading tipping points. In fact the cascading tipping point research is not accounted for in any of:
    • current climate models
    • global carbon estimates
    • IPCC
  • the implications are that the carbon budget is even smaller than the current number.
  • the implications are that 1.5 Deg C is not the threshold we should be aiming for, but even less. We are now at 1.2 so it has to be 1.3 or 1.4.

• question

  • Given the underestimates, should the target actually be revised downwards to 1.3 or 1.4 deg C?

• for: precautionary principle, fossil fuel phase out, carbon budget - uncertainties, carbon budget - underestimate
• highlight
  • the precautionary principle dictates that the uncertainties in:
    • soil carbon
    • ocean carbon
    • ocean heat
    • ice melt
    • biodiversity loss
    • biome tipping points
  • implies that the any one of these can easily bring our remaining carbon budget down to zero.

Title: How Alive Is 1.5? Part One – A Small Budget, Shrinking Fast

Author: - Kevin Anderson - Dan Calverley

Key Messages - For a 50:50 chance of staying below 1.5°C, we’re using up the remaining carbon budget at around 1% every month. - Following current national emissions pledges (NDCs) to 2030 puts the temperature commitments within the Paris Agreement beyond reach. - Claims that 1.5°C is now inevitable also assign “well below 2°C” to the scrapheap. - An ‘outside chance’ of not exceeding 1.5°C remains viable, but ongoing fossil fuel use is rapidly undermining it. - The few credible pathways for an outside chance of 1.5°C are not being discussed. This is an active choice by policymakers and experts, who have largely dismissed equity-based social change.

!- title : 2022 remaining carbon budget - speaker: Kevin Anderson

see https://twitter.com/Peters_Glen/status/1384406952399228928