'Global warming could reach as high as 3.8°C..or as low as 1.7°C when..uncertainties are taken into account

"we are quite uncertain about where current policies and NDCs take us, contrary to a lot of the media and communication during COP26"

Or >4C?

🧵1/yahoo.com/now/study-cast…
Climate scientists are still worried about 4°C

Nov 2021: A 4.0°C rise could see nearly half of the world’s population living in areas potentially affected by extreme heat stress – a potentially fatal combination of heat and humidity.

🧵2/
metoffice.gov.uk/about-us/press…
We are somewhere around the IPCC's 'intermediate' or 'high' emissions scenarios (or even 'very high'?) which suggests 4C-5C or more by 2100 can't be ruled out.

Only a postgrowth economy could keep us below 1.6C by 2050.

🧵3/

carbonbrief.org/in-depth-qa-th…
We don't actually know when carbon cycle feedbacks run away from us. But nobody wants to talk about that.

See thread:



🧵4/
Who (apart from James Hansen and colleagues) is talking about aerosols and 2C by 2040?

🧵5/

insideclimatenews.org/news/15092021/…
'There's a lot we can’t adapt to even at 2C.'

We're heading for 2C by 2042 (give or take ten years).

'At 4C the impacts are very high and we cannot adapt to them.'

4C in the second half of the century is the fear.

Postgrowth system change now.

🧵6/6
theconversation.com/ipcc-expert-wr…

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More from @ClimateBen

21 Nov
Did you know?

66% of primates face extinction

50% of trees & amphibians face extinction

40% of plants & invertebrate pollinators face extinction

33% of insects & marine mammals face extinction

20% of reptiles face extinction

This is about doom limitation.
🧵 1. We must force revolutionary changes to stop the ultra-destructive global growth economy and forge a new system.

See thread:

2. Media ignore this:

'5.2 °C above the pre-industrial level at present rates of increase would likely result in mass extinction comparable to that of the major Phanerozoic events, even without other, non-climatic anthropogenic impacts'

1.5-2C isn't safe.nature.com/articles/s4146…
Read 4 tweets
20 Nov
BREAKING: the percentage of primate species threatened with extinction has risen from 60% in 2017 (75% in decline) to 66% in 2021 (85% in decline) 🧵
🧵1. Paul A. Garber and Alejandro Estrada, primate conservation researchers and co-authors on a 2017 article on primate extinction.

'Much has changed over the past 4 to 5 years, and none of the changes benefit primate population persistence.' inverse.com/science/primat…
🧵2. 'Deforestation of tropical rainforest continues, as large agribusiness companies and governments continue to convert natural habitats to monocultures and fragmented and polluted landscapes for products that are consumed by people in a smaller number of rich nations.'
Read 7 tweets
16 Nov
Might 2°C calamity by around 2036-2045 or soon after still be avoided with the correct actions?

We should all be talking about this, but journalists and editors remain silent (particularly on a much feared aerosol 'termination shock') so people generally have no idea.

Thread:
And see this brief thread (replying to another thread):

Read 4 tweets
12 Nov
BREAKING: as both temperatures & CO2 emissions soar towards record levels by 2023 and industrial trawling and mining wreck the sea bed, climate scientists fear the ocean will soon be unable to provide Earth's largest long-term carbon store
🧵1. Abrupt climate change has 'a "worrying" effect' on the ocean's ability to lock away carbon. If global temperatures increase to levels predicted, the ocean 'will not be able to provide what is currently Earth's largest long-term carbon store'. bbc.com/news/science-e…
🧵2. We're heading for 1.6°C-2°C by the 2030s as corporations d governments openly plan together to increase fossil fuel production in the 2020s. We can't survive the ocean destruction being driven by economic growth. A postgrowth economy is the only way.cnbc.com/2021/07/20/co2…
Read 7 tweets
6 Nov
Capitalism 2027

1. corals: 90% dead
2. unsurvivable heat
3. water scarcity hell
4. Antarctica collapses
5. global food insecurity
6. a million species extinct
7. tropics becoming uninhabitable
8. high risk of climate feedback doom

Only a postgrowth economy can avoid this now.🧵
🧵1 . Scientists agree: economic growth will make the extinction crisis of habitat destruction, toxic pollution and abrupt climate change difficult for humanity to survive decently, or perhaps even at all

* 1.5°C horrors by 2025-2030

The answer? Degrowth:cnbc.com/2021/02/19/deg…
🧵2. Mass media are virtually completely silent on what is essential for survival: rich countries rapidly and fairly degrowing their economies to aim for survival.

* new scientific consensus:

1.6°C-2.4°C hell by 2050 if we don't progress away from growth.yaleclimateconnections.org/2021/08/key-ta…
Read 12 tweets
5 Nov
1.6°C by 2030-2050

1. tropics becoming uninhabitable
2. a million species extinct
3. unsurvivable heat
4. corals 90% dead
5. water scarcity hell
6. global food insecurity
7. dire permafrost thaw
8. risk of climate feedback doom

Only a postgrowth economy can aim to avoid this.🧵
🧵1. “On our current trajectory, we are talking about climate change endangering roughly half of all plants and all insect species..

economic growth is just not viable as a mechanism for future prosperity. In fact, it is associated with future cataclysm.”cnbc.com/2021/02/19/deg…
🧵2. The most optimistic IPCC scenario based on a growth economy? Global temperature hits 1.6°C by 2050 then drops back by 2100. Scientists don't think this will happen.

'Such a relatively short excursion above 1.5°C might not trigger the worst outcomes'😱yaleclimateconnections.org/2021/08/key-ta…
Read 6 tweets

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