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Graeme MacGilchrist

@gmacgilchrist.bsky.social

Oceanographer and climate scientist. Senior research fellow at U. of St Andrews.

308 Followers  |  611 Following  |  97 Posts  |  Joined: 25.10.2023  |  2.2586

Latest posts by gmacgilchrist.bsky.social on Bluesky

The ethical use case for SRM is one in which governance conditions fail to enable adequately rapid decarbonization, and then there is a revolutionary change in governance that allows effective and equitable management of SRM

25.10.2025 20:12 β€” πŸ‘ 19    πŸ” 3    πŸ’¬ 2    πŸ“Œ 2
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Here are the Top 5 Dogs of the week!

17.10.2025 14:32 β€” πŸ‘ 4045    πŸ” 836    πŸ’¬ 320    πŸ“Œ 216

remember when I said that I’ve always said I’ve been saying it for years

23.10.2025 06:35 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Fortunately the people proposing this disgusting treatment of immigrants and their families are currently in opposition not in government. Frankly I'm ashamed that even a minority-party elected politician of my country can dare say this out loud. Gross attitude to my friends and colleagues.

22.10.2025 06:58 β€” πŸ‘ 10    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

It is to the credit of UStA that they cover the surcharge for staff (PDRAs, faculty, fellows), though not currently for students, for whom it’s arguably even more of a burden and access issue. But that is surely a tenuous position in the currently HE financial climate.

22.10.2025 06:58 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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I cannot stand the β€œcritics say” framing. What on earth could you call the NHS surcharge β€” a fee for a service that you concurrently pay taxes for β€” other than double taxation? It is blatant to the point of absurdity. Dump it in the river.

22.10.2025 06:53 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Once more for the people in the back: you cannot ask people to pay many Β£1000s upfront for the *privilege* of *temporarily* coming to work and pay taxes in this country, give them nothing particularly unique in return, and expect that to be a sustainable situation.

22.10.2025 06:46 β€” πŸ‘ 19    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0

The NHS health surcharge is a national embarrassment; and it would be if the affected group were not always perceived as β€œforeign”, and β€œprivileged” to be here at all.

It says right from the start β€œyou will be treated differently here”, and it shows our arse as a nation.

21.10.2025 07:13 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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The Most Efficient Traveler Isn’t a Bird or a Fishβ€”It’s You on a Bike A famous graphic, now updated, compares locomotion in the animal kingdom

A famous graphic, now updated, compares locomotion in the animal kingdom

14.10.2025 13:52 β€” πŸ‘ 100    πŸ” 33    πŸ’¬ 4    πŸ“Œ 9

We killed them all. Every last one of them. And now they will never be again.

They lived their Curlew lives, migrated, cared for their young, and had every right to be here - as much as ourselves. And they did us no harm.

And we killed them all.

11.10.2025 01:08 β€” πŸ‘ 38    πŸ” 33    πŸ’¬ 2    πŸ“Œ 1

This is absolutely staggering.

05.10.2025 11:04 β€” πŸ‘ 83    πŸ” 43    πŸ’¬ 2    πŸ“Œ 1

Had the same response to the Rumi quote!

27.09.2025 20:11 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Presumably there was a time when many more of our 2nd order relationships existed through our shared commitments (to religion, community, leisure)?

27.09.2025 08:18 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

It’s an interesting side note that so many of our second order relationships are about consumption. Our modern lives are steeped in transactions β€” perhaps then it’s not surprising that, unexamined, these relationships are seen as nothing more than transactional.

27.09.2025 08:18 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

4. We pay again and again for a failure to raise taxes. It’s a false economy, for which we suffer in multiple ways.
Fair Taxation Saves Us Money.

26.09.2025 09:36 β€” πŸ‘ 922    πŸ” 111    πŸ’¬ 15    πŸ“Œ 6

It just seems like, if we really wanted to, we could have solved mass poverty by now.

25.09.2025 23:18 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This, from John, is fantastic.

I never really caught that first wave of the internet, but I certainly lament the whirlpool it has become.

18.09.2025 06:20 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Southern Ocean CO2 outgassing and nutrient load reduced by a well-ventilated glacial North Pacific - Nature Communications A better-ventilated North Pacific could have reduced the carbon of water upwelled in the Southern Ocean, reducing outgassing and revealing a remote influence on Southern Ocean biogeochemistry in glaci...

Shankle et al. show how a better- #Ventilated #NorthPacific could have reduced the #ocean-carbon upwelled in the #SouthernOcean, reducing outgassing and revealing a remote influence on #SouthernOcean biogeochemistry in #GlacialTimes. #ice-ages @earthscista.bsky.social
www.nature.com/articles/s41...

18.09.2025 02:09 β€” πŸ‘ 7    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0

πŸ—£οΈ Come one, come all!

Read about connections between North Pacific Ocean ventilation and Southern Ocean carbon release 🌊

This is the first publication from Maddie Shankle’s PhD thesis, with more exciting work to follow!

18.09.2025 05:19 β€” πŸ‘ 11    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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The weak land carbon sink hypothesis Satellite-derived time series of vegetation carbon do not support a strong Northern Hemisphere net land carbon sink.

Maybe the land carbon sink is weaker than we thought. Big implications: "A lower-than-expected land carbon sink would also imply that the land biosphere may be closer to transitioning from a net carbon sink to a net source than current models predict" Randerson et al. www.science.org/doi/10.1126/...

15.09.2025 22:14 β€” πŸ‘ 80    πŸ” 27    πŸ’¬ 1    πŸ“Œ 7
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Last week, our 4th year Environmental Earth Science students were at Loch Etive, getting hands-on experience collecting data for investigating water column profiles & overturning events. Led by Drs James Barnet & @gmacgilchrist.bsky.social & supported back in the lab by @oceanicandrea.bsky.social.

15.09.2025 11:34 β€” πŸ‘ 5    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
Members of SEES on the front steps of Bute, dazzled by the bright Scottish sun. Unless you were smart enough to wear sunglasses like Paul and Bob.

Members of SEES on the front steps of Bute, dazzled by the bright Scottish sun. Unless you were smart enough to wear sunglasses like Paul and Bob.

Meet the motley crew of the School of Earth and Environmental Sciences – ready to kick off the new academic year! πŸŒπŸ‘‹

Special mention to our Head of School, Prof. Rob Wilson, who is cleverly disguised a a responsible adult (the T-shirt says it all) πŸ˜…πŸ€¦β€β™‚

www.st-andrews.ac.uk/earth-scienc...

12.09.2025 09:23 β€” πŸ‘ 14    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0

Moral incoherence is the zeitgeist of our age.

21.08.2025 17:47 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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flat10MIP: an emissions-driven experiment to diagnose the climate response to positive, zero and negative CO2 emissions Abstract. The proportionality between global mean temperature and cumulative emissions of CO2 predicted in Earth system models (ESMs) is the foundation of carbon budgeting frameworks. Deviations from ...

Our finalised paper on flat10MIP is finally up in GMD! This is the experimental protocol which allows for a simple, emissions-driven evaluation of TCRE, ZEC and climate reversibility in CMIP7. Thanks so much to all who ran these simulations as a proof of concept! gmd.copernicus.org/articles/18/...

08.09.2025 09:56 β€” πŸ‘ 55    πŸ” 18    πŸ’¬ 0    πŸ“Œ 2
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Nigel Farage is the biggest charlatan in British political history.

And here's what his constitutents in Clacton really think:

07.09.2025 05:37 β€” πŸ‘ 3277    πŸ” 1313    πŸ’¬ 146    πŸ“Œ 209

There is discussion in AR5 and AR6 about the difficulty in attributing changes in PDV and AMV *themselves* to anthropogenic forcing β€” ie no evidence that ant. forcing alters the variability. But that’s not what these quotes are discussing in the DOE chapter, which is about attribution of GMST trend.

07.09.2025 07:54 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I’ve not been able to find these quotes (or anything like them) anywhere in the reports, and they skew the IPCC framing considerably.

bsky.app/profile/gmac...

Of course it’s possible that I’ve missed them, but I’ve searched extensively (including for every mention of internal/natural variability).

07.09.2025 07:47 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

There are an abundance of things worthy of debate and discussion in climate science - you have championed many of them - but discussion surely needs to be conducted with agreement on what constitutes honest and rigorous scientific inquiry.

06.09.2025 20:46 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Disagree at what level? The DOE report fabricated IPCC quotes implying natural variability undermines attribution of anthropogenic (global mean) warming... It waves aside the pattern effect citing just two studies… These are not sources of disagreement, they are simply not serious scholarship.

06.09.2025 20:46 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
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We had a fantastic research 'away day' at East Sands in St Andrews, where we discussed the future of extreme temperatures as part of GLOBAL-EX project. A lunchtime swim + cheese toasties on the beach was an added bonus! @erc.europa.eu @ukri.org @earthscista.bsky.social @uniofstandrews.bsky.social

05.09.2025 08:23 β€” πŸ‘ 15    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0

@gmacgilchrist is following 20 prominent accounts