A new estimate of fossil CO₂ emissions in 2020 from @Carbon_Monitor, showing a decline in the full year of 5.4% (1900MtCO₂).

The dip was largest in the first COVID19 wave in ~April, but at the end of 2020, monthly emissions were similar to 2019.

1/

arxiv.org/abs/2103.02526
The analysis covers all major emitters
* China the only major nation with grow (+0.5%), with end-of-year monthly emissions exciting 2019 levels
* USA: Down 9.4%
* EU27+UK: Down 7.5%
* India: Down 8.1%

The COVID declines build on top of preexisting trends.

2/
Transport was the major driver of change:
* Ground transport was 37% of the decline
* International transport was 28%, despite representing 2-3% of global emissions

The power sector was 18% of the decline, but monthly emissions are already back to 2019 levels (globally).

3/
The estimates are consistent with other recent estimates:

* @robbie_andrew @CICERO_klima 5.6%

* @clequere with 7% (isolating only COVID effects) nature.com/articles/s4155…

* @IEA with 5.9% (5.6% after leap-year adjustment)

4/
Check out the article, though, do note that it is a preprint working through the review process. It does however use methods previously published...

arxiv.org/abs/2103.02526

5/5

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More from @Peters_Glen

4 Mar
THREAD: Is this time different?

Over 10 years ago we had the Global Financial Crisis (GFC), we discussed recovery funds & rebounds at length.

But 10 years later, the context is different. Pre-COVID growth in global CO₂ emissions was slowing…

nature.com/articles/s4155…
2. The GFC came after 10 years of strong growth. There was a 𝐦𝐚𝐬𝐬𝐢𝐯𝐞 5% rebound in 2010…

Then from around 2012 emissions growth started to slow. Could this GFC recovery funds, GFC after effects, climate policy working, ...? (we don't know)

rdcu.be/bOUaB
3. Comparing 2011-2015 with 2016-2019 (global stocktake), CO₂ emissions have
* Declined in 64 countries: -0.16GtCO₂/yr
* Increased in the remainder: 0.37GtCO₂/yr
* Net increase: 0.21GtCO₂/yr

But emission reductions need to ramp up to 1-2GtCO₂/yr 𝐞𝐯𝐞𝐫𝐲 𝐲𝐞𝐚𝐫...
Read 12 tweets
2 Mar
1. The @IEA is out with estimates of fossil energy CO₂ emissions for 2020:
* Primary energy down ~4%
* CO₂ emissions down 5.9% or 2GtCO₂
* Coal down 4%
* Oil down 8.6%

iea.org/articles/globa…
2. Our latest estimate (from yesterday) is 4.9% down. The main difference is in oil. Our method may not have picked up the drop in international bunkers. Time will tell...

3. The drop in monthly CO₂ emissions was greatest in April during the first COVID19 wave.

CO₂ emissions recovered throughout the year to end higher than levels in 2019, despite 2nd & 3rd & ... waves of COVID19.
Read 10 tweets
26 Feb
"The reason we’re net zero is that we have this enormous renewables business ... all the avoided emissions that come with that" compensate for emissions in other investments.

Houston, we have a problem... This from climate finance champion Carney.

1/

bloomberg.com/news/articles/…
2. "Most large asset managers have a renewable energy fund. Simply having one does not make you net zero. ... Such commitments are not credible & represent greenwashing" @bencaldecott
3. "It’s virtually impossible for a company to be a net-zero company now" @FarsanAlexander

"It won’t matter how many solar panels one installs if we don’t reduce actual CO₂ emissions." @UlfErlandsson
Read 6 tweets
16 Feb
THREAD: A critical look at baseline scenarios

I did a presentation for the @Tekna group on Energy, Industry, & Environment.

Presentation: slideshare.net/GlenPeters_CIC…

Video: tekna.no/fag-og-nettver…
2. There are a range of scenarios spanning the high-end (>5°C in 2100) to the low-end (<1.5°C in 2100). This shows the Shared Socioeconomic Pathways (one of many scenario intercomparisons).

Out of these scenarios, which ones should be used for analysis?

carbonbrief.org/explainer-how-…
3. Baseline scenarios assume no climate policy. Essentially, integrated assessment models (IAMs) apply no carbon price (or emission constraint).

Baseline scenarios range from emissions peaking & declining (<3°C in2100) to a high-end outlier (by choice) RCP8.5 (>5°C in 2100).
Read 25 tweets
15 Feb
IPCC: By 2050 a Brazil-sized area of new forests and/or crops may be needed to meet 1.5°C climate goal…

No, this is not the new Shell scenario, this is the IPCC SR15 Summary for Policy Makers. These are scenarios with no or limited overshoot...

ipcc.ch/sr15/

1/
Shell requires some “700m hectares of land would be required over the century, an area approaching that of Brazil”.

[Why Brazil, that is 850Mha, Australia 770Mha?]

This is a similar area to the favoured “Low Energy Demand” (LED) scenario.

carbonbrief.org/analysis-shell…
2/
Ok, people like spruiking the Low Energy Demand (LED) scenario. I am fine with that.

Despite the title, LED uses just as much land for forests as Shell.

It is a case of low energy demand AND carbon dioxide removal (not either/or). Do people get this?

nature.com/articles/s4156…
3/
Read 10 tweets
13 Feb
Fossil CO₂ emissions are likely to remain flat through 2100 leading to ~2.8°C warming if countries continue historical CO₂/GDP trends.

If countries meet emission pledges & continue reductions, then ~2.3°C.

Not RCP8.5, nor RCP1.9 or RCP2.6...

nature.com/articles/s4324…
Though, note that these sorts of methods are very sensitive to assumptions (played with this before).

They had a similar study a few years back, some thoughts here
medium.com/@Peters_Glen/w…

And here is how the method performed...
Here is a Kaya based projection we did 7 years ago. If a country continues along historical trends, the method is ok. If the country changes trends, the method is useless. See China. We were way out.

Though, for the EU, we will much better than the other study..
Read 5 tweets

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