Discover and read the best of Twitter Threads about #ipcc

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On one side you have a global consensus amongst peer-review paper writing climate scientists, the most respected scientific orgss & by intellectual and socio-political icons such as Hawking, @neiltyson, the Pentagon and the Rockefeller family. The other? You got Trump. THREAD
Who are the other big, household names outright denying climate science these days? There's nobody. Just Trump. This guy: /2
So you can roll with President Nitwit & "conspiracy by the chinese" or you can roll with the Intergovernmental Panel on Climate Change which represents literally 1000s of climate scientists from 100s of countries. There's only one serious, rational, sane answer here #IPCC /3
Read 9 tweets
President Trump upended decades of U.S. policy that started with Richard Nixon when he declared that the goal of the U.S. was no longer “energy independence” but rather “American energy dominance.” This wasn’t Trumpian hyperbole.…
/2 Few policies have been pursued by the administration with more cohesiveness, zeal, and success — or with more potential to yield great and lasting harm. Trump has unleashed a massive, untethered expansion of oil, natural gas and coal production.
/3 Trump's "American Energy Dominance" policy seeks to make the U.S. the world’s foremost fossil fuel powerhouse. Its origins are in the radical writings of 2 Trump campaign advisers who call fossil fuels "The Master Resource,"as I wrote in @RollingStone…
Read 12 tweets
Does model bias effect outcomes of the #IPCC 1.5°C emission scenarios #SR15?

The scenario database is over represented by some model frameworks. Taking statistics will over represent some models (eg, REMIND, AIM), discount others (eg @IEA), & not all models included!

The bias varies by scenario category, here for 1.5°C scenarios with "no or low overshoot" as highlighted in #SR15. Should REMIND & POLES get more weight then GCAM or MERGE?
I often take medians of scenarios to simplify communication, trying to reveal the "key characteristics" of 1.5°C (trying to find robust messages). The scenario community does not like this approach
Read 8 tweets
THREAD (illustrative scenarios):

The #IPCC Special Report on 1.5°C #SR15 highlighted 4 illustrative scenarios. They vary widely in
* Socioeconomic assumptions (SSP1, SSP2, SSP5)
* Total (primary) energy use
* Biomass
* Solar
* Nuclear
* Oil
This is how the illustrative scenarios are presented in the #SR15 SPM. The energy system is shown by the table, the figures seem to give the key characteristics. It seems the selection was based on the use of biomass. 2/
P1 (LED) & P2 (S1) have the lowest use of biomass across scenarios, P4 (S5) has the highest use of biomass. They are outliers, which was perhaps the point of the selection? Because they are outliers, they potentially give a skewed perception of how most models get to 1.5°C! 3/
Read 10 tweets
Today I have been following the reports and articles about the @IPCC_CH report.
I am astonished that we are still talking about the 1,5 degree target as a reachable goal, without mentioning the ENORMOUS requirements that would take. -->
We already have at least 1,5 degrees (pollution hides at least 0,5 degrees ) built up in the system. In the future, we might find a way to limit the warming by 1,5 degrees, and that is almost necessary, with solutions that doesn't exist today.But that can't be our priority now.->
We have less than two years left now to bend the emission curve, and we had this chance to try to inform people about the crisis we are in, but instead we take that opportunity to spread false hope.
IPCC plays huge gamble with our future.
#climatecrisis #klimatkris #ipcc
Read 6 tweets
The #IPCC #SR15 report says very little about solar #geoengineering, which is the main, but not only subject, of my book #ThePlanetRemade beyond saying that there is high agreement that a particular form of it could keep temperatures below 1.5C (Cross chapter box 10 in Chapter 4)
If the IPCC not going into this more seems an odd omission, given the topic, I think it is because a) the scientific understanding on solar #geoengineering, which obviously will never be complete, is still pretty sketchy in many respects (though not as sketchy as some may think)
b) the structure that the IPCC chose for the report (which was forced on it in part by the UNFCCC's mandate to it) did not allow it o assess solar #geoengineering's potential contribution in any of its scenarios
Read 7 tweets
1/10 Last night @IPCC_Ch released #SR15 - this report should shake any lingering complacency, delay, and denial out of every country, and spur us all to action. #IPCC #SR15 @IPCC_CH
2/10 Slashing carbon pollution in 10 years & essentially eliminating it by 2050 is the century-defining challenge. One that demands we revisit the terms of the discussion for what it means to address #climatechange. #IPCC #SR15 @chriscmooney @brady_dennis
3/10 Given the threat our planet faces, one step we must take is to end technology tribalism in picking how we cut emissions. #IPCC #SR15…
Read 10 tweets
Today much of the world's population lives safer, more comfortable, healthier, longer, more productive lives than ever before. And yet, around half of the global population currently lacks access to enough electricity, and 1.2bn people have no access at all. #IPCC 1/n
Global electricity access is rising, which is improving the lives of millions. But this means our decarbonisation challenge is even greater, since we not only have to replace our entire fossil fuel infrastructure, but probably double it to meet rising global energy demand. #IPCC
The question is where will this energy to come from? A: Right now, mainly from #coal. #IPCC
Read 25 tweets
1/ What role for natural gas in a 1.5⁰C world?

Some reflections from the new #IPCC #SR15 report:

2/ A reminder: natural gas currently accounts for 20% of global energy emissions and is the world’s fastest growing fossil fuel. In the IEA’s current policies scenario, gas demand could increase by ~50% by 2040.

How far is this from a 1.5⁰C pathway?
3/ With coal, the IPCC message is simple: stop burning it. The IPCC pathways show a reduction in coal in primary energy use of 59-78% by 2030, compared to 2010. By 2050 it falls 73-97%.
Read 11 tweets
This is the issue of our time. The fight of our lives. Brexit and Trump are a trifle compared to sea level rise, crop failures, climate refugees...

We need to act NOW.

#IPCC #ClimateChange @GeorgeMonbiot @1010
There are all sorts of things we can do as individuals e.g:

- Reduce car usage
- Switch to green energy supplier
- Improve home insulation
- Eat less meat
But most importantly, governments need to feel the pressure to:

- Ditch fossil fuels
- Ban fracking
- Properly support renewables

And this is just for starters.

Any party that doesn't support these as an absolute minimum doesn't deserve to even be on the ballot sheet.
Read 4 tweets
#IPCC report says limiting warming to 1.5 degrees will require an industrial transition unprecedented in scale - but that it’s possible, if the political will is there - and that the wider opportunities and benefits are huge

So here are a few ideas for our own Government ... 1/6
Advice to Government:

Save money and carbon by stopping actively damaging projects like fracking, airport expansion, HS2, new nuclear, road expansion - and spend it on creating hundreds of thousands of jobs through a rapid expansion of renewables #IPCC 2/6
More advice to Government:

Save even more money and carbon, and create even more jobs by ending subsidies for fossil fuels and taxing them for the damage they cause. Spend that on reducing energy bills through huge nationwide insulation programme.

#IPCC 3/6
Read 6 tweets
1 (thread). Most UK papers think a drunken snog at Strictly is the most important story today. More important than a terrifying new #IPCC report saying we have 12 years to stave off the catastrophic effects of global warming...
2. More important than this (from @guardian. The Independent and @washingtonpost also led on it, along with the @BBC. London Times leading on Brexit.)
3. Broadsheet editors have always been lectured on how patronising they are to believe “they know best”. So worthy to tell people what they *should* be interested in.
Read 7 tweets
THREAD (to get you prepared for the #IPCC Special Report on 1.5°C #SR15)

What are the origins of 1.5°C?…
1987: President of the Maldives: "We know, & yet we keep delaying action. The time for just talking is over."
1988: James Hanson testified "99% confidence"
1988: The #IPCC is born
1990: IPCC First Assessment Report (FAR)
1990: Alliance of Small Island States (AOSIS)
1992: UNFCCC "to prevent dangerous anthropogenic interference with the climate system"
1997: Kyoto Protocol
2007: Bali Road Map gives new hope
2008: A limit well below 1.5°C (Tuvalu, AOSIS)
2008: 1.5°C to stay alive
2009: Copenhagen Accord enshrined 2°C in climate politics
Read 5 tweets
After 70 years of imperial/neoliberal indoctrination the web of lies is so obviously absurde (9/11, Skripal, WH = ISIS, etc.), that it is dissoluting. The empathetic humanity connects, closes ranks and sends their eternal psychopathic rulers and their lackeys into nowhere land.
The "evil empire" is a lifelong three year old child. I certainly loved my children at that age too, however only because they created not only a surreal mess, but also made steady progress.

A great documentary about psychopathy and society:
The elite invented "democracy" to protect them from the empathetic people. The media are their means for misleading the people sedated by "democracy". This is definitely a bad thing since the people have become educated and the elite almost totally insane.
Read 209 tweets
In 2013 @IPCC_CH concluded “Surface meltwater, although abundant on the #Greenland ice sheet, does not drive significant changes in basal lubrication that impact on ice sheet flow”. Could the opposite be emerging as a new paradigm? Thread 👇 1/12. Read and tweet. #climateclimate
The #IPCC #5AR statement (above) refers to efficient evacuation of meltwater in large channels, which can slow down the #ice flow by removing water that otherwise would lubricate and promote faster sliding over the bed. 2/12…
Evacuation of meltwater in efficient channels explains why #ice flow in some regions of #Greenland has slowed down despite year-on-year increases in air temperature and surface melting. But how widespread are those observations? 3/12…
Read 13 tweets
1/ [thread] #climat #GIEC #IPCC #climate
Ce matin, un pseudo-sceptique (@hugues, pour ne pas le citer) brandissait une liste de 400…
2/ …papiers scientifiques censés démonter le consensus - représenté par le GIEC - que le climat se réchauffe et que les activités humaines…
3/ …en sont la cause. Cette liste était bien sûr censée fournir la preuve que de nombreux scientifiques doutent de la responsabilité…
Read 29 tweets

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