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New Royal Society climate briefings outline what two IPCC special reports mean for the UK. They examine the links between land and climate change, and the warming climate’s effects on the oceans and ice-covered parts of the Earth: bit.ly/2qbRZiN #IPCC
Sea level change will be one of the major impacts of climate change on the UK. @theCCCuk has said that the UK’s current coastal adaptations are insufficient considering sea level rise of at least 1m is a “near certainty” – perhaps before 2100.
@theCCCuk Around 72% of the UK’s land area is used for agriculture, so improving land use and management practices will be "critical” to achieving the goal of #NetZero by 2050.
@theCCCuk The summaries identify steps UK policymakers can take, domestically and internationally, to address the highlighted risks and opportunities. bit.ly/33Xo4tl #NetZero
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The Royal Society
@royalsociety
#OnThisDay in 1867, Marie Curie was born. Curie became the first woman to win a @NobelPrize, she is the only woman to win twice and the only person to have been awarded the prize in two different sciences.
She shared the 1903 Nobel Prize in Physics with her husband Pierre Curie and physicist Henri Becquerel for their work on radioactivity. She won the 1911 Nobel Prize in Chemistry for her discovery of radium and polonium.
The Curie's research was crucial in the development of x-rays in surgery. During World War One Curie helped to equip ambulances with x-ray equipment, which she herself drove to the front lines.
Read 7 tweets
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The Royal Society
@royalsociety
Today is #AdaLovelaceDay, which celebrates the achievements of women in science, technology, engineering and maths. Follow our thread to uncover the stories of some of the most influential women in British science history...
Caroline Herschel (1750-1848) was the first woman to earn a living as an astronomer and the first to win a Gold Medal from the Royal Astronomical Society. #AdaLovelaceDay

You can learn more about her in our film from #InternationalWomensDay:
Mary Somerville's (1780-1872) first scientific investigations began in the summer of 1825, when she carried out experiments on magnetism. Her 1826 paper was the first to be read by a woman to the Royal Society. #AdaLovelaceDay
Read 12 tweets
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The Royal Society
@royalsociety
The UK could be #CarbonNeutral by 2050, meeting its #ParisAgreement targets, according to a new report from The Royal Society and @RAEngNews. Here are 8 technologies and approaches that could be vital (a thread) royalsociety.org/greenhouse-gas…
Forestation – whether it’s replacing lost trees or creating new forests, this technique means more trees. Better management could remove as much as 12 gigatonnes of carbon dioxide per year.
Habitat restoration – 80% of the UK’s wetlands, peatlands & coastal habitats are considered to be in poor condition. Restoring these could prevent previously trapped carbon from escaping, & store up to 18 tonnes of carbon dioxide per hectare per year royalsociety.org/topics-policy/…
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Glen Peters
@Peters_Glen
The #IPCC 1.5°C Special Report #SR15 used four illustrative pathways that varied by BECCS.

They all have considerable land-use change: 1500 million hectares is 4.5 India's!

If they don't have large-scale BECCS, they have large-scale afforestation. Land impacts unavoidable.

1/
These are the four illustrative pathways. From left to right, they have more and more BECCS (yellow), though this does not correlate with land areas or impacts

From SPM ipcc.ch/sr15/

2/
The #IPCC Special Report on Climate Change & Land #SRCCL says that BECCS is bad at scale (red), while afforestation is good (blue) across all dimensions but food security

But, if "best practice" is used, the BECCS & afforestation seem to be a win-win-win-win. Hmmm...

3/
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Dr Jane Zelikova 👩🏻‍💻🐜🌾🌎
@j_zelikova
The #IPCC special report on the land sector is out.

It's the culmination of the hard work of 107 experts from 52 countries.

I've got some big takeaways. Buckle in – it's going to be a long thread.

Some quick background:

Land and ocean warm at different rates (thank you @RARohde) for the great figure.
Land is both a carbon source and sink. The balance between the strength of sources and sinks determines overall impact of land on GHG emissions. Humans already use a LOT of land (almost ¾ of all ice-free terrestrial surface, according to the IPCC graphic below).
Read 24 tweets
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Stephen Cornelius
@SteveJCornelius
Takeaways from the #IPCC Special Report on #ClimateChange & Land (#SRCCL). A thread.

1) We use a lot of land (much unsustainably)

Humans directly affect ~72% of "global ice-free land surface" & all is impacted by climate change (e.g. through warming & more intense extremes

1/9
2) A two-way interaction

Our use of land drives #ClimateChange ("agriculture, forestry and other land use" are ~23% of global man-made GHG emissions) & climate change adds stresses so worsens existing risks (e.g. biodiversity & degradation from extremes events)

2/9 #IPCC #SRCCL
3) As well as being an emission source, land is a sink

Photosynthesis draws down carbon dioxide from the atmosphere and fixes it in plants (and soils). Overall the land is a net sink of ~29% of total human-induced CO2 emissions.

3/9 #IPCC #SRCCL
Read 9 tweets
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Glen Peters
@Peters_Glen
THREAD

The next #IPCC Special Report is out, this time on climate change & land (#SRCCL). ipcc.ch/report/srccl/

There is plenty to digest over the coming days, weeks, months, years, but a few initial reactions from the SPM...

1/
Just to set the scene, no pressure: "Land provides the principal basis for human livelihoods and well-being including the supply of food, freshwater and multiple other ecosystem services, as well as biodiversity." Land is already heavily impacted...
2/
Agriculture, Forestry, & Other Land Uses (AFOLU) are a quarter of global GHG emissions (GWP100).

The natural response of land to human-induced environmental change has been to cause a sink of ~11.2GtCO₂/yr, 29% of global CO₂. This may not last with climate change.

3/
Read 12 tweets
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Glen Peters
@Peters_Glen
THREAD on IEA, IPCC, & 1.5°C scenarios

The @IEA is getting pressure to do a 1.5°C scenario. We have an #IPCC Special Report on 1.5°C #SR15, so why not do a comparison...

As it happens, some IEA scenarios fall in the envelope of 1.5°C scenarios...

1/ ipcc.ch/sr15/
What are the IEA scenarios?
* Energy Technology Perspectives 2°C scenario (2DS, not in #SR15 database)
* ETP Beyond 2°C Scenario (B2DS, in database)
* IEA Sustainable Development Scenario (SDS, not in database)
* IEA Faster Transition Scenarios (SDS to net-zero, in database)
2/
The CO₂ emissions from energy & industry (not LUC) for the two IEA scenarios are rather similar to the 1.5°C with no or low overshoot
* IEA B2DS is roughly consistent with 1.75°C warming in 2100 (though, #SR15 does not assess this)
* IEA Faster Transition is assessed as 2°C
3/
Read 15 tweets
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Glen Peters
@Peters_Glen
THREAD (to get you prepared for the #IPCC Special Report on 1.5°C #SR15)

What are the origins of 1.5°C?

cicero.oslo.no/en/understandi…
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

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