What was the big news you missed yesterday?

@Equinor is going to net-zero in 2050...

There are a range of measures. The system boundary is expanded to include Scope 3 (use of oil by third-parties), but then allow offsets for third-party CCS.

1/

equinor.com/en/how-and-why…
On the Scope 1 (&2) the ambition is to "achieving carbon neutral global operations by 2030", which allows the use of carbon markets, but to go "near zero" by 2050 in Norway (no offsets).

This is likely required by legislation anyway (eg EU may require net-zero GHG in 2050)?

2/
On Scope 1 (&2) in global operations by 2050, the ambition is not clear but presumably net-zero allowing offsets. This is perhaps ok, as some global operations may be in countries that have no or weak policy, so it would be more ambitious than the host country policy.

3/
Scope 3 is more interesting. Scope 3 is Equinor's sale of oil & gas. Usually this is the responsibility of the consumer of the oil (it is their Scope 1).

There is no legal requirement for Equinor to reduce Scope 3, & doing so implies some double counting (which is ok).

4/
If all Equinor oil & gas went to the EU (it doesn't, this is a hypothetical), then the oil & gas would be under scope 1 in the EU system.

Since Equinor is doing Scope 3, it is basically a greenlight to regulators in Europe it is ok to price oil & gas. So, regulators...

5/
The Scope 3 is net-zero based on "net carbon intensity", basically, emissions divided by product volume. But, since this is net-zero, & volume can't be infinite, it means the (net) emissions need to be zero...

6/
If it was a 50% reduction in the net-carbon intensity, it could be that volume could increase (this was the "old" Equinor target from February 2020).

But, with a net-zero target (100% reduction), it means that net emissions have to go to zero.

7/
That does not mean Equinor will not produce oil & gas. Since they include Scope 3 (Scope 1 of oil users), they allow offsets.

These offsets include third-party CCS, where Equinor stores & manages CO₂ for others (northernlightsccs.com/en). This is one way to incentivise CCS.

8/
This is a bit like the proposal of Myles Allen @ecioxford to require fossil fuel companies to store an equal amount of carbon that they extract.

Take some CO₂ out of the ground, well then put an equal amount of CO₂ back in the ground...

oxfordmartin.ox.ac.uk/blog/co2-captu…

9/
Another avenue highlighted by Equinor is the extraction of gas & conversion to H₂ with CCS. This is not really an offset as CO₂ is not emitted (assuming 100% CCS).

Like CCS, Equinor needs to help create a H₂ market. A market will not spontaneously emerge, work required!

10/
Equinor is also shifting (some) capital to renewables, with a targeted production capacity of 4-6 GW by 2026 & 12-16 GW by 2035 (Equinor equity shares).

How aggressively Equinor goes into renewables (even electricity markets) will be interesting to see in the future.

11/
Lot's of elements in the new policy. It was only February that they raised climate ambition, & now again, 9 months later with an updated climate ambition.

Things are moving fast. Companies need to respond. Net-zero pledges from countries will force the same from companies.

12/
Congratulation @andop68 on a big announcement on the first day leading @equinor. It sets a nice direction for your tenure! Now it is a case of implementing company policies that "bend the curve" & ensuring the targets are met & bettered!

Lykke til!

13/13

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More from @Peters_Glen

19 Oct
1. We have heard the mantra that net-zero CO₂ is needed to get stable temperatures, but nearly all mitigation scenarios have negative net emissions. Why?

This means that the temperature declines when emissions go negative.
2. In this scenario, by 2100, the large scale negative net emissions shaves of 0.2°C. Carbon dioxide removal (CDR) at scale has many potential non-climate impacts & may be costly.

Would the world generate so much CDR to slowly bring temperatures down by 0.2°C?
3. It is more likely, in my view, that the world would simply stabilise temperatures.

CDR is still needed to offset hard- or expensive-to-mitigate emissions, but the scale is greatly reduced.
Read 7 tweets
15 Oct
THREAD: The @IEA now has an aggressive 1.5°C scenario, reaching net-zero by 2050.

It builds on the Sustainable Development Scenario, strengthening reductions in power & end-use, but with new behavioural measures.

The light blue scenarios are IPCC SR15.

iea.org/reports/world-…
2. Contrary to the view of many, the Sustainable Development Scenario (SDS) was already quite aggressive (~1.65°C).

The Net-Zero 2050 Scenario (NZE2050) is more aggressive than the SDS on power & end-use, but also includes some additional behavioural measures.
3. The thing with the behavioural measures is that you have to do a lot of them, & they are quite specific & targeted. This is on top of aggressive technological change.

The point is that 1.5°C requires pulling on pretty much every level, to the max. Now, not tomorrow.
Read 16 tweets
12 Oct
@timinmitcham @kmac @bataille_chris @SvenTeske @JoeriRogelj @IEA I have not put all the IEA WEO2019 into my system, but I show what I have. CO2 was tweeted earlier. I show a figure for 1.5C (no and low overshoot from IPCC) & Lower 2C (around 66% <2C). IEA is sort of in between in terms of carbon budget (I think).

This is coal.

1/ ImageImage
@timinmitcham @kmac @bataille_chris @SvenTeske @JoeriRogelj @IEA Oil. Which interestingly, IEA generally is lower on oil (but still argues because of decline in existing fields, there is more space for oil investments).

2/ ImageImage
@timinmitcham @kmac @bataille_chris @SvenTeske @JoeriRogelj @IEA Gas. Where IEA is higher than most others. Though, there is quite some spread... ImageImage
Read 6 tweets
8 Oct
THREAD: N₂O

We have a new paper in @nature on nitrous oxide (N₂O), five years in the making!

Like many GHGs, N₂O concentrations have been stable for thousands of years, but that balance between sources & sinks has been dramatically changed by humans.

rdcu.be/b8cgZ
2. N₂O is a potent GHG, 300 times worse than CO₂ over 100 years (GWP). It destroys the ozone layer & contributes to water pollution.

N₂O is ~7% of current radiative forcing, but because of its long lifetime & difficulty to mitigate, this will increase even in 1.5°C scenarios.
3. N₂O comes almost equally from natural (60%) & anthropogenic sources (40%).

Natural sources are dominated by microbial processes that break down nitrogen-containing compounds in the soil & oceans. These sources have previously balanced with the atmospheric chemical sinks.
Read 12 tweets
7 Oct
There is often an assumption that the more aggressive climate targets means more BECCS.

This is only weakly true, many 2°C scenarios use as much BECCS as 1.5°C scenarios, & even >2.5°C scenarios use BECCS at scale!

IAMs just love BECCS 😍🥰😘

1/
These are scenarios that go over 2°C. Yes, some scenarios use over 20GtCO₂/yr in 2100 (we currently emit 40GtCO₂/yr). These are not aggressive mitigation scenarios, these are >2°C, & where we could end up with only weak climate policies like we have today.

2/
It is not that 1.5°C or 2°C (or even 3°C) needs large-scale BECCS, this is just the cost-effective pathway that most IAMs find. This could be for a variety of structural reasons.

Since BECCS is so prolific in scenarios, we obsess over it. It may just be a model artifact!

3/
Read 6 tweets
6 Oct
Even though N₂O’s Ozone Depletion Potential is only 0.017, roughly one-sixtieth of CFC-11s, the large anthropogenic N₂O emissions make N₂O the single most important source of ozone depletion (that was in 2009!)

1/

science.sciencemag.org/content/326/59…
For the emission metric nerds out there, there is a close historical link between the Global Warming Potential (GWP) and the Ozone Depletion Potential (ODP).

The paper uses GWP & ODP, to contrast climate & ozone impacts.

2/
If you want to understand the GWP, read up on the ODP...

In this paper on the integrated Global Temperature change Potential (iGTP) I dug into some of the history, & it made me understand the GWP much better...

3/

iopscience.iop.org/article/10.108…
Read 4 tweets

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