Monday, May 23, 2016

"untrue" that excessive calories caused obesity

So according to the National Obesity Forum (as reported by the BBC), it is
There's usually a gram of truth underlying each new bit of dietary advice that pops up in the news every 5 minutes. But it's generally buried under a mountain of hyperbole. It now seems clear that the anti-fat advice that I grew up with was somewhat exaggerated. However, does the NOF really expect us to believe that this fine fellow:


built up his fine physique through a strenous regime of cold showers and beatings alone? Incidentally, he's not one of the really fat ones, but he won the one tournament that we went to.

Nothing about this on the NOF website, which seems a bit odd.

Monday, May 16, 2016

Open review vs open access.

Now that Boris Johnson has finally Godwinated the EU referendum debate I don't need to discuss that, and can talk about this instead. Though actually, it's about at the same intellectual level as Johnson's comments. Everyone agrees it's junk, the questions are why this stuff gets written, and how it gets published. I won't speculate here on the why (I already did here), just the how.

It has appeared in a new journal of unknown quality, the AGU (partnering with Wiley) seemingly jumping on the open access pay-to-publish bandwagon. It is worth noting, Bates has not previously published there, he didn't choose it out of familiarity or convenience, but had (apparently) been shopping around since at least 2014 with this idea trying to find a home. Pretty much everything gets published eventually, by the way. It just takes longer if it's either rubbish, or a revolutionary idea that is well ahead of its time.

It's a shame Bates didn't have the guts to try ACP or ESD, where his manuscript would have been shredded by reviewers in short order. It is all too easy for a lazy or overstretched editor at any journal to simply use the author's “suggested reviewers” without also looking for an independent view. At least in the case of the EGU open review process, an incompetent reviewing process is in principle discouraged by the fact that it's out in the open, and there is of course the opportunity for other interested parties to add their views. Score +1 for open review.

Tuesday, April 26, 2016

BlueSkiesResearch.org.uk: Oh Vienna redux




It’s April, so it must be EGU time again! No Vienna marathon this time – the race was the same date as Manchester this year, a week too early for our trip – so we went purely for the science. Well, the science and the schnitzel. The plan was to go over on the Friday before the conference started, with the intention of enjoying a weekend of sightseeing and relaxing in the sun, but both jules and I contrived to come down with flu again after the Manchester outing, so instead we spent the weekend mostly lying in bed and coughing our lungs up, failing even to attend the Vienna Phil for which we had (cheap standing room) tickets on Sunday morning.

karl.jpg

Monday morning started with jules’ paleo modelling-and-data session, including talks on the effects of changing ocean tides, the green Sahara problem, state dependence of climate sensitivity and other things. After a lunch meeting we were both pretty much wiped out for the day and sidled off home without staying for the evening posters. Tuesday had a session on some minor revisions to the the 19th/20th century record, and then climate prediction including my talk on model independence. As jules keeps telling me, it’s time that was written up. In the afternoon we went to one of these funny debate things (nominally about resource depletion), where a bunch of people said how awful everything was, and one token panellist played Devil’s Advocate and argued that we could technologise our way out of it all. He almost managed some decent points, but unfortunately was more of a journalist/writer than scientist so didn’t really have anything much to back up his rhetoric. As expected, he was ritually disembowelled both by the other participants and the questioners from the floor, so all went away happy that indeed we really are all going to die. Can’t help thinking it was a bit of a missed opportunity for a real debate though. A further session that afternoon on open access publishing was cancelled, so I didn’t hang around for the medal lecture later on that evening. Unfortunately this is also not one of the handful of streamed talks – I think the EGU could do better with this.

Wednesday was data assimilation day, as usual a mix of highly technical and irrelevant stuff, interspersed with a handful of interesting and useful details. Sadly the medal lecture this year was all about turbulence which isn’t really my thing, but overall the session was worthwhile. Finally managed to stay long enough for a beer in the posters, though there were not many relevant ones to look at. On Thursday I decided to expend my horizons with sessions on renewable energy (good idea, but some limitations) and tsunami,  which was interesting. Somehow missed the debate on open access publishing, which I have now played on the webstream, and it wasn’t really that exciting. Lots of standard comments (including the usual crop of irrelevancies) and fairly smug “but it works” replies. The Hansen paper got a lot of discussion, but whatever you think about how that was handled, one example out of thousands of papers does not amount to much really. I’m sure we can all point to stuff that shouldn’t have happened in any journal we care to mention (though of course in many cases it’s hidden away). There was another publishing party in the evening, it seems that they manage an excuse for a celebration just about every year!

By Friday people were starting to drift off home as always. However jules had been roped into talking about models in the geosciences, (this was also streamed) so I thought I ought to turn up and show support. Probably the most interesting talk for me was the last one by Charlotte Werndl, on “double-counting” data for both tuning and validation. It is rare to find a philosopher with enough of a mathematical background to be able to back up their rhetoric. By the afternoon I was pretty much wiped out, we did manage to attend the convenors’ party but didn’t stay long.

Overall, I didn’t find the EGU quite as exciting as usual, though can probably put that down to being ill for most of it, as I definitely picked up some useful bits and pieces. The days are really long when you are not feeling 100%, running from 8:30am potentially to 8pm then with dinner to follow. Needless to say, we didn’t do many full days this time. In fact we barely went out in the evenings and my first and only schnitzel was on the last Saturday night just before flying home.

2016-04-23 18.47.24

Next year, the Vienna Marathon is scheduled for the Sunday immediately prior to the EGU again. Watch this space…

Monday, April 11, 2016

2:54:41

Another spring, another marathon. Manchester this time. My entry of which was really borne out of my plan to do the 3 Peaks fell race this year. With all the training that's necessary to get round that in reasonable shape, it seemed a good idea to slip a road marathon in for no extra effort, which I could count as training/race practice. Also, this would give me two bites of the cherry in case the 3P went pear-shaped for any reason. When the date for Manchester - flattest and best marathon in the UK, no less - was announced as 3 weeks before the 3P, a plot was hatched...

Winter training went well, consisting of my usual Jack Daniels marathon stuff with an added helping of fell running. Jules and I did 3 of the Kendal Winter League events, and I did some of my long training runs on the peaks themselves - partly to learn the course (I'd not even been up either Whernside or Pen-y-Ghent before) and partly to get a bit of practice at running up (and down!) steep hills on tired legs. Well, walking up and running down. But I didn't really have much idea how this off-roading would translate into pace on a flat marathon. The Haweswater half marathon in early March was too hilly to be a great guide and that very day I came down with what I thought at first was a cold but what with hindsight I think was a persistent though fortunately mild flu-like illness. Took a full 3 weeks to get properly back up to speed (ie Easter weekend, a mere fortnight before the race) and I was really unsure what to aim for until I got wind of some people on a running forum aiming to run 2:55. So I decided the best option was tag along with them, at least to start with.

Booked a hotel in Salford Quays for the night before, and arrived early enough to have a wander round the Lowry, which was worth a visit. Jules had more recently come down with flu and was still recovering but came along anyway as supporter/tourist and, as it turned out, sag wagon. Dinner was booked in a local restaurant - a good move as when we turned up, there was a big queue of hungry runners (you can tell by the shoes) waiting for tables. I think I've got the answer to pre-race feeding sorted now - similarly to Chesterfield, I worked my way through a platter of BBQ ribs, with half a chicken on top this time, all washed down with a couple of pints of Boddies. Who needs pasta when you've got this much meat?

The last supper

As a result of this (and a quick bowl of cereal in the morning) I hardly felt like eating all the way round the race, though I did make myself force down a few of the gels that were provided, plus two whole pieces of home-made Kendal mint cake, just in case I needed them.

The hotel was undergoing substantial renovation but would have been fine, were it not for the person who came back to the room next door and started up a party at about midnight. To be fair, he wasn't actually very noisy, the problem was that our rooms had a (locked) connecting door that wasn't adequately soundproofed. After a while I asked him to quieten down and he was very apologetic, but I could still hear him/them until about 3am or so. Not the best pre-race night I've ever had.

The morning dawned sunny and chilly, just what we'd hoped for. The plan was to wander straight down to the start area just in time for the race, with jules later taking my bag to the baggage drop where I could pick it up at the end. However we were a bit early and decided to do the bag drop together first. It got more and more crowded the closer we got, until I panicked, left the bag (fortunately only a medium sized rucksac) with jules and jogged back to the start as a warm-up. She then had a closer look at the queues and gave up on them, and ended up carrying my bag along with hers all morning. Just as well, as apparently the bag collection was even more chaotic than the drop, with people having to queue for literally hours to retrieve their clothes (and in many cases wallet/phone etc). A warning for next time. The obvious alternative is to carry all valuables, only bring old/cheap/worthless clothing and be prepared to just stash that somewhere around the "race village" aka stadium. Which we've done often enough at other events. We could have left some stuff at the hotel too, it was only a mile away.

Found my internet running mate Dave along with a few others at the start, had a quick chat to confirm plans and pushed our way in front of the 3h pacer who was surrounded by a huge rolling road-block of runners. The race itself went really well, though the course was certainly a bit suburban and boring compared to the sights of Vienna. We were just a bit up on pace through the first half, which was feeling really comfortable for me.


The easy bit, about 5 miles in.

Too easy, really - if I'd been by myself I would probably have pushed a little harder. Pulse was in the low 140s to half way (which we hit just a few secs under 2:55 pace), at which point I decided to press on a little and left Dave behind. I was building up a bit of a cushion of time, cruising past loads of people and at one point thought that 2:53 might be on the cards. However, the last stretch was mostly into wind and this, together with my by now rather sore legs and foot, soon put paid to that that idea and I settled for my original target. The last straight is interminable and the finishing arch was visible for about a mile, seemingly not getting any closer for minutes on end, so it was a relief when the clock eventually came into focus and I realised that I really was going to get that sub-2:55 time. According to the official results, I was 307th at half way and 182nd at the finish. Or 16th male of a certain age, if you prefer.

Even with being relatively early home, the finish area was quite crowded with spectators, and I was lucky that jules managed to do a great job first of spotting me (earlier than she'd expected me to arrive, optimist that she is) and then meeting me just past the finish line with my clothes etc. There followed a slightly tedious and tiring afternoon waiting for trains which are a bit sparse to Settle, particularly on a Sunday, and we only finally got home arond 7pm. Perhaps that's a reason to splash out on a second hotel night, but it might seem a bit of a waste when we, or certainly I, would be too tired to enjoy Manchester properly and still have to take half of Monday getting home.

Thursday, April 07, 2016

Climate sensitivity is 5.3C?

Too late for an April Fool, my eye was caught by this headline in the Guardian:
 With the article itself containing the odd phrasing:
Researchers said that a doubling of carbon dioxide in the Earth’s
atmosphere compared with pre-industrial times could result in a global
temperature increase of up to 5.3C – far warmer than the 4.6C older
models predict.
4.6C seems a strangely high value to start with, it's some way from any consensus value (and it's not even the upper end of the oft-quoted undcertainty range of 2-4.5C).

Sadly, the paper is paywalled, so I can only see the abstract. But it seems that the authors are arguing that models have a bias in the way they represent clouds (too icy, not wet enough), and correcting this bias will shift their sensitivities up a bit. 4.6C is the most sensitive model in the AR4 and it seems to get shifted up a smidgin to 5.0-5.3C (there is presumably some uncertainty in the adjustment to each model). The paper also says the sensitivities shift by "up to 1.3C" which must therefore be the largest potential shift of any of the models, and probably some way above the mean estimated change. It doesn't look like such a revolutionary change as to justify the headline, even if one accepts that the result is right.

Of course, if the models were more sensitive, it would (other things being equal) result in greater warming not only in the future, but also in the past. Which would make it more challenging to reconcile with what we've observed. Kevin Trenberth (who has presuably seen the whole paper) doesn't seem that impressed. Maybe I'll manage to find a copy somehow...

Update: seems like several others have weighed in similarly (Gavin, ATTP). The Yale puff piece is particularly misleading, constrasting the old 2-4.6 model range with a new range of 5-5.3 which is surely nonsensical. Even without reading the paper, it's obvious enough that 5-5.3 does not represent a new range that would contain all the models, since they only move by "up to 1.3C". I'm fairly confident that my interpretation above must be correct.

I don't want it to sound like I'm determined to reject any attempts to change our estimate of sensitivity. But any substantial changes will have to be supported by significant evidence to overturn the weight already accumulated. In this case, what I'm really objecting to is the hyped-up presentation of what is actually a pretty small change anyway.

Saturday, April 02, 2016

GingerGhost

Lovely GingerNuts only lasted 3 weeks before a GingerLady came and took him away to his new life hunting GingerRabbits around the legs of the GingerHorses on a farm deep in the Lune Valley.  All is well, but when we got the cats back from the rescue after Easter we found that GingerNuts' ghost had somehow stowed away with Spice and Pepper:


Being much lighter than GingerNuts, GingerGhost floats around the furniture, and has a tendency to waft to the top of the house. He's friendly, nimble and elegant, and Spice and Pepper are a lot less bothered by him than they were by his predecessor.  Can't say more yet as I haven't played with him much due to being down with 'flu for the last few days. 

He was originally called GingerTip at the rescue, but maybe that was a made up name. They changed his name to Benson, because he, apparently, likes the bed. We don't let the cats in our bedroom. Hope this won't be a problem; he seems to have taken well to the upstairs sofa instead. But, does this mean I have to rename him 横浜ワールドポーター (Yokohama World Porters), which is where we bought that sofa? 


Monday, March 14, 2016

[jules pics] Yet more Blue Skies!

Windows done, James is making the most of the luxury scaffolding to practice his lime mortar pointing skills. Last week was too cold, then it was too wet, and now, apparently it may be too warm and dry, in which case I'm not sure quite which day of the year would actually be OK for this temperamental task! Anyway, he has no choice, as we can only keep the scaffolding up a bit longer. At least, with all this good weather, he can do some Blue Skies Thinking while he is up there... 


James up  ladder
--
Posted By jules from jules' pics.

Tuesday, March 08, 2016

3D Impossipuzzles

In its own way, Yorkshire culture is as crazy as Japanese culture. Today's cultural exercise was doing an impossible 3 dimensional puzzle halfway up a mountain (Ingleborough), in the rain. It was also quite cold (the ground was hard with ice as we set off up the hill) although it did warm to a few degrees above freezing later on.

The game starts with a drystone wall. This is a wall of rocks which have been shaped by nature, and which contains no mortar. Clearly such a wall is physical impossibility but in Yorkshire these walls are everywhere and they magically stand up all on their own for hundreds of years. But sometimes the magic spell breaks and this causes part of the wall to fall down. The puzzle is to fully take down the wall and rebuild it using the pieces strewn around your legs so that it will stand for another 200 years or so. The original magic spells seem to have been lost, so modern woman has to achieve this using 3D puzzling. I was very surprised that most of the rocks are quite light so this is a sport which anyone who can stand the cold and rain can take part in. The main skill required is that of mental rock spinning. I've had so much practice packing our van with boxes in the last couple of years that I found this part came quite easily, but it was certainly tiring both physically and mentally. 

This photo was taken when we had almost finished for the day. Our section was not quite complete, but we seemed to have made fairly good progress, although one of the other teams had a much more difficult challenge as they were building on a very steep slope.


Picking up strewn rocks to put in wall... James works hard while the gurus give sage advice.


This is our bit of wall from the side. At the end of the day, our guru pointed out how it could have been done much better - there were many errors! But he also pretended that he wouldn't be out tomorrow to take it all down and redo it, stating that, despite all our errors it "would stand". That's nice - at last we've made a real contribution to something in the world!

The day included traditional Yorkshire feasting: sandwich and a thermos, at a slightly less windy spot.


Friday, March 04, 2016

windows

Spent the week in the cat room. It has been quite exciting, especially on Tuesday afternoon, when, through the miracle of Skype, we were transported to a meeting room in Reading University to discuss paleoclimate research with some colleagues. Hope they enjoyed the occasional cat appearance. 

The reason for our retreat is windows, or rather, the hole created when a window is removed. Our house has a lot of windows, and all the topmost ones were all poor in some way. Some were cracked, some failed double glazing, some single glazed, and one was opaque for no reason we can comprehend. Rapid progress has been made. There are to be 15 new panes in total and just 3 still to go - the hard to access ones s behind the stove. Still, they have a nice day for it today with only a couple of inches of snow on the ground! The window peoples do just one window at a time, but one window-sized hole in your open plan living area is enough to make you switch off the central heating and retreat to the cat room with its electric storage radiator and supplementary electric heater. It's been quite snug. 

The scaffolding went up at the weekend, and we will keep it up for a while to repoint the upper levels (hopefully it will warm up a bit next week to make this possible). Here are the window peoples (Touchstone Glazing) working on a hole.



And here's a hole where there used to be a failed double glazing unit and is now a lovely new one.



Ten thousand pounds is a lot of money to spend on improved transparency. The previous occupants had done some not very good artwork as well as stuck some transfers on several of the windows to simulate stained glass, so we thought give ourselves something to remember and put leaded lights in the holes where that had previously been decorated windows. Ultimate vanity this, as the images are adapted from my photos. Left to right, top to bottom, Pen-y-ghent, Ribblehead viaduct, Scaleber Force, and Ingleborough. Pen-y-ghent with its bright sun faces east, and  Ingleborough is in the south at the west end of the building, where the setting sun catches the light - which is why we made a sunset image. It seems to work - it was glowing very nicely yesterday evening. These leaded lights are double glazed units, with a leaded glass pane stuck in the middle, so sort of triple glazed I suppose.

Friday, February 26, 2016

BlueSkiesResearch.org.uk: Could the Pliocene constrain the Equilibrium Climate Sensitivity?


The long-awaited prequel to "Can the Last Glacial Maximum constrain climate sensitivity?" is now up on CPD and open for comment. This latest episode is set back in the mid-Pliocene warm period 3-3.3Ma BP (MPWP, sometimes also called mid-Piacenzian by people who care deeply about the conventions for paleoclimate nomenclature). The particular reason for looking at the MPWP is that it’s the most recent period when CO2 was relatively high (at least compared to pre-industrial, though perhaps not so high compared to today) and the climate was correspondingly warm. This means that it avoids some of the major complications that arise when studying the Last Glacial Maximum, where there is the question of how directly a strong cooling informs about a strong warming, and large ice sheets provide a substantial forcing to the atmosphere-ocean system that does not necessarily combine linearly with other forcings such as GHGs. Thus, PlioMIP was born around 2009, and by 2015 lots of different modelling groups had produced simulations of the MPWP to compare with each other and with the data assembled by the USGS. Being much further back in time than the LGM, the data are much more sparse (even though the interval of time is also far broader) and more uncertain. Also, the boundary conditions such as atmospheric CO2 level are not known with great precision. One might be suspicious that choice of value used in the simulations, 405ppm, could have been been influenced by political considerations :-)

Although theres been a fair bit of analysis of the model results, no-one had looked directly at how the simulations depended on the equilibrium climate sensitivities of the models. So we did the usual thing, of comparing the tropical temperature change at the MPWP, to the equilibrium sensitivity of the models. It looks like there might be some sort of relationship there, though it’s far from certain.

Here’s the main result, with the model results represented by red dots.
sensi_plio_paper1.png

The temperature data for the MPWP is a bit less well developed than for the LGM, so we didn’t really have a good uncertainty estimate but instead just tried a few possible values as a sensitivity test. It is also notable that the model ensemble seems to generally show more warming here than the data, although with substantial overlap if uncertainty is taken into account. It is possible that the forcing is too strong, or that the models are too sensitive in this region, or it may be that the data are wrong, or to be more precise, misinterpreted in terms of climate. I try to be avoid saying things like "the data are wrong" especially when talking to the data specialists, as at some level the data are definitely correct, real stuff has been measured and the measurements themselves are not in any real doubt. It’s how these real measurements are translated into a putative climate variable that is where the difficulties lie. Another interesting and possibly disconcerting aspect of this result is that the regression line does not pass through (or close to) the origin, implying that a hypothetical model with zero sensitivity to CO2 would show a significant tropical cooling at the MPWP. It is hard to see how that might arise, although it is also hard to see how a model with zero sensitivity to CO2 could arise anyway. It is perhaps not completely impossible that increased latitudinal transport would result in a tropical cooling accompanied by a high latitude warming so as to cancel out the change on the global average. After all, there has to be some explanation as to why a small change in model sensitivity seems to correspond to such a large change in MPWP tropical warming in this sample. We've presented this work a few times and no-one has come up with any great ideas about it.

Anyway, we don’t have any strong conclusions, it might be possible to generate a meaningful constraint out of this, but we don’t have any real confidence in the specific result presented here. PlioMIP2 is being planned, with various improvements over the original PlioMIP. Most importantly perhaps, the researchers are aiming for a true "time slice" in which orbital and other forcings are near enough constant (and so, hopefully, the climate was in some sort of equilibrium with this), rather than aiming for some sort of average over the warm peaks within a longer interval, as PlioMIP did. The main problem with this is that the data become even more sparse, but it should in principle enable a more meaningful model-data comparison. Watch this space!