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Glen Peters
@Peters_Glen
, 4 tweets, 2 min read Read on Twitter
I have finally updated to Version 2 of the Shared Socioeconomic Pathways (SSP) database. The data has a few updates, a few new variables, & now includes the 1.5°C scenarios.

Still need to tweak figures & code (of course)...

1/
 tntcat.iiasa.ac.at/SspDb/dsd?Acti…
The updated database includes CCS in terms of CO₂, so I no longer need to estimate it from fuel consumption.

But, for some reason, GCAM has quite some CCS already...

2/
Bioenergy with Carbon Capture & Storage (BECCS) where 10-15GtCO₂/yr is not unusual in mitigation scenarios, & it is used in nearly all mitigation scenarios.

3/3
Though, I think I got the 1.9W/m2 marker wrong. @DetlefvanVuuren is IMAGE used for the 1.9 marker? I thought it was MESSAGE...
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Glen Peters
@Peters_Glen
Are Australian GHG emissions stable or skyrocketing?

It depends on how you plot it, & putting LULUCF at the bottom of the figure makes it look better than otherwise.

Figure from the Australian National Inventory Report unfccc.int/documents/1957…

1/
Putting the LULUCF emissions at the top, & changing colours, makes a huge difference. Excluding LULUCF, with all its complexities & tricks, reveals that Australian GHGs have grown a solid 32% since 1990, instead of down 11% with LULUCF.



2/
GHG emissions from the energy sector have grown the most, but slowed recently. Emissions from transport continue onwards & upwards.

Better build that solar / wind & roll out those EVs. Oh, elected the wrong government...



3/
Read 4 tweets
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Glen Peters
@Peters_Glen
Wind & solar (green) are a very small share of India's energy use & coal use continues rapid growth (as do CO₂ emissions).

It is a long, long way for renewables to displace coal in India... Why is India then hailed as a climate leader?

1/ cicero.oslo.no/no/posts/nyhet…
India is building huge amounts of renewables, but this does not reduce emissions unless it displaces coal power (which it doesn't). India further supports its coal industry. It will take decades of rapid renewables growth to meaningfully reduce coal use. 2/
Perhaps India is a climate leader for renewables deployment, but it is not a climate leader for reducing emissions. Likewise, Norway is a climate leader for EV deployment, not for reducing emissions. It seems climate leadership is not about reducing emissions?
3/3
Read 3 tweets
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Glen Peters
@Peters_Glen
"...even with break-neck electrification of vehicles, buildings, & industry, unprecedented improvements in energy efficiency, completely decarbonized
power generation, & CO₂ removal ... will be essential for the US to decarbonize by midcentury"
1/
 rhg.com/research/captu…
For the US to reach net-zero emissions by 2045 between 560 & 1,850MtCO₂/yr will need to be removed by DAC & permanently stored, depending on the availability of other CO₂ removal options, such as BECCS & afforestation, & the pace of electrification in other sectors.
2/
Even under a less ambitious US target of 83% below 2005 levels in 2050, CO₂ removal remains necessary to offset stubborn sources of CO₂ such as long-haul aviation & shipping, & energy-intensive industrial activities.
3/
Read 5 tweets

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