Geoff Vallis

Important to note that our conclusions depend not just on the results of model integrations, but on our understanding of the mechanisms involved. Still, little is certain in this business, and it does not mean the risk of collapse is not there, even if we think it is unlikely.

It's taken a while! We finally managed to show how to do Generalised Direct Statistical Simulation. Paper in @JFluidMech. doi.org/10.1017/jfm.20…

Obviously, teaching mathematics (which Lehrer chose to do) is just some obscure profession not worthy of the finer minds. Who knew? theguardian.com/music/article/…

@CColose Any chance of axis or curve labels on the figure? :)

Reminder that the length of the (solar) day in Earth is longest around December. The average solar day is 24 hours, longer than a sidereal day (23 hr, 56 min, 4sec), but that extra 4 minutes changes throughout the year due to eccentricity and obliquity.

Not only was the late Jimmy Buffett a great songwriter, but he also understood the profound differences in atmosphere/ocean dynamics between mid-latitudes and equatorial regions...

The article itself isn't so bad, and gives a reasonable account of some topical research. But in true #Guardian style the headline is doom-laden and melodramatic. It doesn't help. And what was once a fine newspaper has become a tabloid.

The Gulf Stream is a wind-driven current. It isn't going to collapse unless the winds cease or the Earth stops rotating, neither of which will happen soon. The AMOC is a different beast, but the headline might equally well have said 'The AMOC is unlikely to collapse by 2025'.

Oh dear. theguardian.com/environment/20…

Very happy to be promoted to associate professor @UniofExeter! It’s a pleasure working at a place that fosters excellence in education. I’m grateful to my colleagues, friends & family for their support 🙂 More innovations and collaborations to come! But now time to celebrate! ❤️

The Department of #Mathematics and #Statistics at the University of Exeter is seeking to appoint two #Lecturers to join our Dynamical Systems and Analysis group. To find out more: ow.ly/WRLb50OOgBU

New preprint on the maximization of climate sensitivity at 310K. essopenarchive.org/doi/full/10.22…

The sad thing about twitter is that, although many of the tweets yesterday were evidently meant to mark the day (April 1), they were barely less believable than many in the usual crop.

@StevenTobias7 Indeed.

Just found my annual email about ResearchFish submission in my Junk email folder. No comment.

@JemmaShipton @jmak_1020 I aim to please all my customers.

@jmak_1020 so considerate of @GeoffVallis to write a book of just the right length

My lab manager really likes sleeping on paper. Everytime I'm in note making mode she is like "ah, time to nap" She highly approves of Geoff's book because it doubles as a pillow with the right hardness at the right height. #academia #lecturing #makinglecturenotesthedaybefore

Very excited to be joining @ExeterUniMaths from May!! I will miss my colleagues @UniKentSMSAS and @UniKentSEaK but looking forward to new adventures @UniofExeter!

@StevenTobias7 I think it happens in the US to some degree, but not as much as the UK. The whole high-school and university education system here doesn't help. Sunak's proposal was at least well-intentioned, but needs some work.

This is very interesting and definitely resonates. As a mathematician, the UK is the only place where I experience educated people proudly telling me that they were awful at maths as if it were a badge of honour ('proudly innumerate'). This really does harm the country.

Professor Ulrike Tillmann, President of the London Mathematical Society, responds to the Prime Minister's Speech on behalf of the Protect Pure Maths campaign:

Happy new year! What better way to celebrate being back in work than to read about theories of inhomogeneous and anisotropic turbulence? Well you're in luck. Just published by @AnnualReviews of Fluids. Review by @Brad_Marston and me... annualreviews.org/doi/abs/10.114…

@JanDZika Sad news. His tracer release experiments were indeed transformative, and will have a lasting impact. He was also a very nice person.

Tragic to hear of the passing of Jim Ledwell. He transformed how we understand the ocean. Hard to understate the novelty of actually releasing a passive tracer into ocean interior. It shifted oceanography from a purely observational science to one where we do ‘experiments’💙

@kyz1024 If I were in SIAM I would vote for you. And that is reason enough to join.

Hi all, I'm running to become secretary of the SIAM: Life Sciences activity group. If you're a member of this group, I'd be much obliged to receive your vote here: vote.electionrunner.com/election/mI9bk Only take two minutes, and that's mostly in remembering your password!