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Apr 4 • 9 tweets • 10 min read
#IPCC #AR6 Working Group III SPM and Full Report on "Mitigation of Climate Change" is now available
ipcc.ch/report/ar6/wg3/
🧵on key figures and tables from Summary for Policymakers
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
SPM.1: Global net anthropogenic GHG emissions (GtCO2-eq yr-1) 1990–2019
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
SPM.2a: Regional GHG emissions, and the regional proportion of total cumulative production-based CO2 emissions from 1850–2019
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
SPM.2b: Regional GHG emissions, and the regional proportion of total cumulative production-based CO2 emissions from 1850–2019
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
SPM.2c: Regional GHG emissions, and the regional proportion of total cumulative production-based CO2 emissions from 1850–2019
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
SPM.3: Unit cost reductions and use in some rapidly changing mitigation technologies
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
SPM.4: Global GHG emissions of modelled pathways and projected emission outcomes from near-term policy assessments for 2030
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
Table SPM.1: Key characteristics of the modelled global emissions pathways
ipcc.ch/report/ar6/wg3/
#ClimateReport Image
Key figures & tables from the #IPCC #AR6 WG III Summary for Policymakers
Box SPM.1, Figure 1: Projected global mean warming of modelled scenarios included in categories C1-C8 and IMPs & five illustrative scenarios (SSPx-y)
ipcc.ch/report/ar6/wg3/
#ClimateReport Image

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More from @Oliver_Geden

Oliver Geden Profile picture
Apr 4
The #IPCC #AR6 WG3 report includes a comprehensive assessment of Carbon Dioxide Removal (CDR), its role in mitigation strategies and long-term pathways, but also a techno-economic assessment of ~10 CDR methods
An ongoing 🧵
[1/n] Image
For Carbon Dioxide Removal, it's still early days in #climate policy, although there are already established methods (mainly forestry-related and soil carbon sequestration, not necessarily done to remove CO2)
In #AR6 reports, there aren't chapters dealing solely with CDR
[2/n]
There was quite some CDR coverage already in the #AR6 Special Reports on 1.5°C (#SR15) and on land (#SRCCL). In WG I, CDR was mainly assessed in chapter 5 ('Biogeochemical Cycles'), and a bit in chapter 4

[3/n]
Read 25 tweets
Oliver Geden Profile picture
Mar 21
Today, we'll enter the long but final stretch for #IPCC #AR6 WG III report on mitigation - the virtual approval session, finalizing the 'Summary for Policymakers' (SPM) with governments Full Report and SPM to be published on April 4
Some insights...
ipcc.ch/meeting-doc/ip… [1/n]
First WG IIl lead author meeting took place 3 years ago, the process in itself way earlier. There've been delays because of #COVID19, but "Final Draft Report" has been submitted already in Nov 2021. The last months of work have been mainly about SPM
ipcc.ch/about/preparin…
[2/n]
There are strict confidentiality rules in the #IPCC when it comes to content, but as an intergovernmental organization, the #IPCC is quite transparent when it comes to process.
apps.ipcc.ch/eventmanager/d…
[3/n]
Read 9 tweets
Oliver Geden Profile picture
Oct 29, 2021
How will climate negotiators deal with diminishing carbon budget for 1.5C?
Some thoughts from our recent @OneEarth_CP paper "#UNFCCC must confront the political economy of net-negative emissions"
Now available #OpenAccess for 2 months
cell.com/one-earth/full… #COP26
(1/n)
Paper led by @aniruddh_mohan, co-authored with @MathiasFridahl, @hollyjeanbuck & @Peters_Glen
cell.com/one-earth/full… #COP26
(2/n)
Basic problem is quite easy to understand. We're very close to 1.5C, and even if you think it's still possible to stay within the remaining carbon budget (<500 Gt), this would mean that every country needs to reach net zero pretty soon.
#COP26
(3/n)
Read 10 tweets
Oliver Geden Profile picture
Oct 29, 2021
Remarkable framing shift ahead of #COP26

While "close to 1.5C" is politically more plausible than "limit to 1.5C", it's quite ambiguous, similarly to already established "well below 2C"

Is this the new language incorporating (initial) overshoot of 1.5C?

politico.eu/article/why-th…
Some background on #IPCC WG1 projections for threshold 1.5C crossing times under different scenarios, explained by @hausfath for @CarbonBrief
carbonbrief.org/analysis-what-…
"Constructive ambiguity" is a useful tool to reach agreement under #UNFCCC. But problematic that #ParisAgreement doesn't exclude or at least sets clear constraints for 1.5C overshoot. Creates way too much flexibility
See our 2017 @NatureGeosci piece
rdcu.be/cAqml #COP26
Read 4 tweets
Oliver Geden Profile picture
Aug 9, 2021
IPCC #AR6 WGI report on the physical science basis of climate change is out today.
Find the the Summary for Policymakers and the Full Report here ipcc.ch/report/ar6/wg1/
[1/n]
Here's a short thread on Carbon Dioxide Removal, and how the #IPCC #AR6 WGI assessment (led by @KirstenZickfeld) relates to the WGIII report (due in March 2022)
ipcc.ch/report/ar6/wg1/
[2/n]
First, some important context on remaining carbon budgets, pathways and net-zero emissions - since it doesn't make any sense to talk about Carbon Dioxide Removal (CDR) in isolation.
ipcc.ch/report/ar6/wg1/
#IPCC #AR6
[3/n]
Read 15 tweets
Oliver Geden Profile picture
Jul 14, 2021
Finally, here's @EU_Commission's #Fitfor55 package, to adjust EU #climate policy legislation to move from original 40% reduction target to 55% by 2030 (vs 1990)
Remember: these are only proposals, decision eventually to be made by @EUCouncil & @Europarl_EN ec.europa.eu/info/strategy/… Image
detailed #Fitfor55 proposals to be found at bottom of the page ec.europa.eu/info/strategy/…
The new Effort Sharing table
Germany, Denmark, Sweden and Finland move to -50% (2030 vs 2005)
#Fitfor55
ec.europa.eu/info/sites/def… Image
Read 5 tweets

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