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Did you know?

1. “Temperature increases beyond 1C may elicit rapid, unpredictable and non-linear responses that could lead to extensive ecosystem damage.”

2. '2C would be enough to threaten life as we know it.'

3. We're set to go over 2C of global warming by the 2040s

Thread:
The quotes come from this 2017 article.

“The consequences of failing to keep the temperature below 1.5C will be to wilfully condemn hundreds of millions of the poorest citizens of Earth to certain deaths from the severe impacts of climate change.”

amp.theguardian.com/environment/20…
From 2016: "I think it is fair to say that there is literally no chance of making the 1.5C target".

'Earth is on track to sail past the two degree Celsius (3.6 degrees Fahrenheit) threshold for dangerous global warming by 2050'.

phys.org/news/2016-09-g…
The abrupt collapse of major ecosystems like corals and forests therefore looks set to occur in the 2020s, 2030s, and 2040s.carbonbrief.org/deep-emissions…
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Ben See
@ClimateBen
Permafrost:

1. We're set for massive, rapid releases of carbon from 2035

2. A catastrophic boost in global warming of 0.4 - 0.8°C within decades is feared

3. Thawing is occurring 70 years earlier than expected in some areas

4. Slashing emissions immediately is our only hope
“We may start to see widespread degradation in permafrost … somewhere in the timescale of 20–30 years,” Vladimir Romanovsky, a permafrost expert at the University of Alaska, said.

From April 2017.

grist.org/article/arctic…
'Thawing permafrost will release carbon to the atmosphere that will have an appreciable additional effect on climate change, adding at least one quarter of a degree Celsius by the end of the century and perhaps nearly as much as one degree.'

archive.thinkprogress.org/carbon-feedbac…
Read 6 tweets
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Ben See
@ClimateBen
I think a number of climate scientists consider the disappearance of summer Arctic sea ice as relatively unlikely before 2035 - 2045, but I would suggest we could well hit 1.6C - 1.9C around 2027 - 2034.

1/
Two recent reports from the last few months suggest summer Arctic sea ice disappearance by the 2020s or 2030s is more likely than the 2039-2044 suggested here.

The critical question: will this lead to a rapid boost in global warming & extreme weather?

2/
 scientificamerican.com/article/when-w…
If ice-free Arctic summers became common this could lead to a staggering and obviously catastrophic 0.5C of additional global warming. It'd also influence permafrost thawing which could lead to an equally terrible ~0.2 to ~0.9 of warming by the 2090s.

3/
Read 5 tweets
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Ben See
@ClimateBen
Harold Wanless, director of the University of Miami’s geological sciences department and a leading expert on sea level rise, fears that a variety of feedback loops will contribute to a dramatic increase in sea level in the coming decades.

1/3
news.yahoo.com/amphtml/its-al…
“My work on ancient climate shows we have these rapid pulses of rise that are rather dramatic, up to 10 meters of sea level rise certainly within a century, and that’s a really rapid disintegration of ice,” Wanless said. news.yahoo.com/amphtml/its-al…
“We’re just seeing the beginning of ice melt and the beginning of the warming of the waters reaching up to the Arctic, in what is most certainly going to be the beginning of one of these rapid pulses.”

news.yahoo.com/amphtml/its-al…
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