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Dr. Julia Hargreaves (Japan)

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Publications

Date Publication
08.04.2009 Article: Comment on "Aerosol radiative forcing and climate sensitivity deduced from the Last Glacial Maximum to Holocene transition", by P. Chylek and U. Lohmann, Geophys. Res. Lett., 2008
J. C. Hargreaves and J. D. Annan
Climate of the Past, 5, 143-145
SRef: 1814-9332/cp/2009-5-143
22.12.2008 Article: Comment on "Aerosol radiative forcing and climate sensitivity deduced from the Last Glacial Maximum to Holocene transition", by P. Chylek and U. Lohmann, Geophys. Res. Lett., 2008
J. C. Hargreaves and J. D. Annan
Climate of the Past Discussions, 4, 1319-1326
SRef: 1814-9359/cpd/2008-4-1319
06.02.2007 Article: Linking glacial and future climates through an ensemble of GCM simulations
J. C. Hargreaves, A. Abe-Ouchi, and J. D. Annan
Climate of the Past, 3, 77-87
SRef: 1814-9332/cp/2007-3-77
12.10.2006 Article: Linking glacial and future climates through an ensemble of GCM simulations
J. C. Hargreaves, A. Abe-Ouchi, J. D. Annan
Climate of the Past Discussions, 2, 951-977
SRef: 1814-9359/cpd/2006-2-951

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Latest Blog Posts

  • 18.06.2018: To Boulderly Go (and come back again)

    As I think was probably guessed, we were in Boulder recently. It was just a holiday this time, we didn't get closer to NCAR than the cafes in the mall at the bottom of the hill. There may be photos to follow.

    As well as discovering that a local parkrun had recently been set up literally minutes from our apartment (what are the odds of that, with only a dozen events across the entire USA?) our trip coincided with the Bolder Boulder 10k race again. I have by now improved to the extent of qualifying for the first “A” wave for runners with a sub-38 min time (and also for sub-2:55 marathoners, which for me was rather easier to achieve). Though these results were not achieved on an uphill course at altitude so I didn't expect to go that fast in the BB!

    I had vague ambitions to break 40 mins but without much proper training and on such a difficult course that was always going to be a tough challenge for me. I was just about in touch with that pace most of the way round but there's a bit of a climb to the finish which killed any plans for a fast finish so I didn't quite manage it. Just past the finish line there were people handing out vouchers for t-shirts for anyone who broke the 40 min threshold. If I'd known about them I might have tried a bit harder! On looking up last time I see they were advertising the sub-40 t-shirts back then too so I think they are probably a regular feature. Still, a 3 min PB is not to be sniffed at I suppose. Jules also took about 3 mins off her previous result.


    A nice solid heel strike there...I must have been going downhill :-)

    Maybe next time I'll manage to whittle off another 30 secs for the t-shirt. If there is another time. The whole trip was lots of fun so I'm sure we'll be back.

    After the race (and a short breather) we cycled up into the mountains for lunch with our friends Rob and Elizabeth. They had thoughtfully moved a bit closer to town so it was only an hour up hill. And rather less back home.


    Source: James' Empty Blog

  • 03.06.2018: More word salad

    Having accused someone else of writing a word salad it's only fair that I should tar jules with the same brush too :-) Life as an unemployed self-employed scientist isn't all holidays and bison burgers, she occasionally does some work too though coincidentally (or not) her latest paper is the result of another trip to the USA a couple of years ago. Unfortunately someone didn't get the open access memo hence my link is to the sci-hub copy. Writs to /dev/null please.

    It's a review and thus should be accessible to a wide audience, but monsoon dynamics is a fair way outside my comfort zone so I don't really have much to say about it. The abstract appears to have a rather low Flesch Reading Ease score of 6.8: for comparison my first paragraph above rates 51 (the scores are out of 100, with higher numbers more readable) so I think I've got a good excuse. I think the main conclusion is that more research is needed, and that if someone could come up with a better all-encompassing theory that explained it all, that would be really great. From the paleo perspective (which is where jules comes in) there is the well-known Problem of the Green Sahara, being that there was significant (vegetation-supporting) precipitation in this region during the mid-Holocene, which models cannot adequately explain or represent.

    Here's a diagram about monsoon dynamics:



    Well, that's about it from me. Still on holiday but we've got some work lined up and will be be returning to it in the near future.


    Source: James' Empty Blog

  • 15.05.2018: We’re not in Yorkshire any more Toto


    Source: James' Empty Blog

  • 16.04.2018: BlueSkiesResearch.org.uk: EGU2018 Day 5

    One final push…we were back on paleoclimate again first thing, more data than models though a bit of a mix of both. Just as the session ended and I started to think about going in search of lunch, lunch arrived in the form of sandwiches for the Atmospheric Sciences Division meeting. I usually attend the Climate Division meeting so thought it might be interesting to see if AS would have a different style. It didn’t really (even the sandwich was the same), and the most interesting points of discussion were rather similar – mostly, how to cope with the meeting outgrowing the available space. There’s no great solution and I am coming round to the idea that a slight discouragement towards throwing in too many abstracts might be the least-worst approach. There are of course ways round the one-abstract-per-first-author for anyone sufficiently motivated (like jules and I might be) but people who chuck in virtual duplicates to several sessions might be dissuaded which would be a good thing in terms of conference quality as well as freeing up space. I’m not sure it will make much difference overall though as surely there can’t be all that many of these cases. Some audience members also made the case for more remote participation and I don’t think the EGU can continue to resist this indefinitely. Attending in person brings greater benefits, but also costs, and allowing people to participate without the massive investment of time and money involved in travel could surely only be a good thing.

    The afternoon sessions contained some advanced and high resolution modelling – a mix of future plans and existing results. Bjorn Stevens gave a well-received talk extolling the benefits of 1km resolution modelling. Mind you a bunch of high-resolution modellers is perhaps not the toughest crowd for that topic! There were some very truthy images of modelled clouds looking like reality. A particular goal of the highest resolution modelling is to resolve tropical storms and some of our past Japanese colleagues had some impressive results here too.

    Previously the Friday afternoon slot has usually been a bit of a graveyard with lots of conference-goers leaving early for flights home, but now the schedule is so full there was even a busy poster session in the evening, including more of both the paleo and advanced numerical modelling. We hung around for the start of the convenors’ party but left quite early.

    IMG_4427

    And now for the final score: jules says she had 9 free meals during the week, which were much higher quality than previously (so that’s where the EGU budget disappears to). As for myself, I attended 7 of the 3 meals to which I was actually invited. It seemed a particularly good week this time, perhaps partly due to our long absence. We last came 2 years ago when we were so ill and tired we only attended a fraction of the week, so this time there was rather a lot of new stuff. Jules was also involved in three sessions and we had a total of 4 presentations between us, which kept us busy across a wide range of topics. There was also an element of escapism for us in getting away from home for a bit, which we can now return to feeling (I hope) somewhat rejuvenated.

    As for Day 6, we started off with a lovely sunny jog along the Donau Insel, and I’m pleased to report that my legs are now just about working properly after the marathon.

    IMG_4431

    Some gentle sightseeing in town (see Belvedere above) was rounded off by a fabulous concert from the Vienna Philharmonic. I always check their schedule when we are at the EGU – more often than not they are either absent or sold out but this time we got prime seats for a concert including Elgar’s Cello Concerto by Sol Gabetta. We were so worn out by this stage that we forgot to check the venue and went to the wrong place, but fortunately the right place is only a short walk away. jules and I were amused to see a prominent EGU committee member taking photos in the concert hall just after the announcer had clearly forbidden such behaviour <br/>
				<a class= Source: James' Empty Blog

  • 14.04.2018: BlueSkiesResearch.org.uk: EGU 2018 Day 4

    Four days in and the fog is descending…not the weather which remains resolutely warm and sunny, but my mental state after on overload of science, food, drink, and long days. Nothing compelling at 8:30 so we had a morning jog and breakfast at the excellent cafe just outside our apartment. Possibly the best almond croissant ever, feeling a bit stupid for not discovering this place before as we’ve stayed in the same airbnb three times now. We’ve got some catching up to do!

    IMG_4398

    There was a mathematical session at 10:30 covering a huge range of ideas. I was particularly looking forward to a talk that promised to explore the mathematics of emergent constraints. However it turned out to be a little more specialised than I had hoped, focussing in detail on the relationship of variability to long-term changes motivated by the recent Cox et al paper. Still lots of room for more to be done here.

    Lunch was the GMD editorial board meeting. I’m happy to see GMD charging on successfully and jules will be stepping down from her Chief Exec position in due course. It’s no longer growing rapidly but seems to have stabilised at a reasonable level. I don’t think there is anything of great public interest to report. There will be a mobile version of the journal website launched soon.

    Straight after lunch was jules’ climate sensitivity session. I’ve struggled to organise similar sessions in the past so it was great to see that this was packed with great talks and well attended too. Andrew Dessler gave a particularly good presentation on some of his work on interannual variability and also included the below graphic which is perhaps my biggest contribution to science this year. Perhaps I should have made a slightly less fuzzy green camera, it’s a bit low-resolution but never mind.
    IMG_4404
    There is still a general prohibition on photography “unless the presenter authorizes it. Presenters are encouraged to inform the audience if they welcome photos.” Baby steps when compared to the blanket prohibition that has been in place in earlier years. People take photos all the time of course, it’s easier than writing a note these days if you want to take down a name/reference/idea/… Maria Rugenstein also gave a nice summary of er Longrun MIP analysis which I’ve seen some of before but which seems more complete now.

    After tea I listened to Tim Palmer’s medal lecture. Tim sometimes gives interesting-but-controversial talks about wild idea relating to stochastic parameterisations, stochastic computing or his aims for a global climate centre, but this was more of a standard didactic history lesson on the growth of probabilistic prediction in numerical weather prediction. As such I knew most (but not all) of it and it was probably of wide interest but not hugely stimulating to me personally. The main message is that we should make probabilistic weather forecasts, and we already do, so that’s alright then.

    jules and I had three posters to defend between us, slightly inconveniently arranged on three different (but at least neighbouring) rows. We had however discovered the best strategy for dealing with the 5:30 beer queue (thanks to a fortuitous coincidence on Monday) so at least were well fuelled for the occasion. Lots of interesting conversations ensued, at least that’s how I remember it. As well as taking about our own work there was time to visit the others in the sessions."Oh look here’s James to tell you why your poster is wrong" said one person as I wandered along which raises the question of how many others were thinking it <br/>
				<a class= Source: James' Empty Blog

  • 12.04.2018: 2:48:44

    Another year, another PB.

    This year the marathon was scheduled for the Sunday immediately before the EGU. However we weren't committed to that so I entered anyway when they sent me an early bird discount offer. The Vienna marathon was also a week too late for a combined work/run trip.

    Later on we started to think about the EGU trip, and realised that it was actually possible to run the marathon, go straight to the airport, and hop on a plane to Vienna. The marathon is on the south side of Manchester and really very close to the airport. Parking the van in the city centre can be difficult due to height barriers so rather than a hotel we found an airbnb in a residential area a couple of miles south of the race start which proved to be very convenient. There was even a fabulous pizza just down the road. Probably the best we've had this side of the Japan Sea, in fact. A proper soft chewy crust with a few crispy bits and plenty of topping.




    Under usual circumstances, one between two would have been reasonable, but these were not usual circumstances! We staggered back and collapsed into bed.

    Sunday morning dawned cold, cloudy and still. It would be hard to imagine a better day for a marathon. I forced down a bit more breakfast before packing up and heading off to the start. Didn't see anyone I recognised, but I hadn't really expected to. There was a club-mate somewhere a bit further back in the field but as I had last time I hopped the barrier close to the front and tried to position myself among other people aiming for a similar time. After a good winter of training I'd been starting to dream of the magic 2:45 (the threshold at which I could enter the Championship race at London and line up alongside people such as Bekele and Mo Farah etc) but didn't think it was that likely. 2:50, on the other hand, I was confident of beating, having come reasonably close to it last year. During training I had beaten my half marathon PB by about 100 seconds, which logically should be worth comfortably than 3 mins over a marathon. However, while the running had been going well, there had been a lot of other stuff happening that had meant I hadn't been sleeping well for a while. You never quite know what's going to happen on the day either.

    So I set off around 2:47 pace, feeling ridiculously comfortable as you do when your legs are fresh after a gentle couple of weeks tapering. Settled into a comfortable pace, trying to stay in groups of similar speed. Seemed to be going well, I had dreams of a fast second half but made sure not to try too hard too early. I't do 20 miles or so, then sprint past everyone with a fast last 10k.

    Around half-way there's a section where the course doubles back on itself and we saw the leaders coming back. Two Kenyans glided effortlessly past.



    and then after what seemed like an age but was probably less than 30 seconds, a bunch of brits appeared. One of the Kenyans appears to have dropped out later but the other won by a few minutes. Only 2:21, the best runners aim for London of course.

    Somewhere around this point I caught up with one of the elite female runners, and we ran together for a few miles. I later discovered that she had a best time of 2:37 and ran in both the Commonwealth Games and European Champs back in 2010. Not bad company to be keeping. Up to mile 20 and even a little beyond I was doing fine, but gradually things started to hurt - especially my left hip and leg which have been the weak spot before, so either I'm slightly weak on that side or slightly lopsided in running. The planned fast last 10k became a fast 4 miles then a fast 5k and although I did try pushing on the pace just a little bit at that point ("it's just a parkrun!"), I soon reverted to damage limitation and decided to just keep on plodding on in the hope that I wouldn't fall apart too badly. This worked pretty much ok, I did lose a minute over this section to Holly who kept on at a steady speed but that's not too bad in the great scheme of things. The two halves were 1:23:28 and 1:25:16 which is only a positive split of 1:48, a touch higher than ideal but hardly shameful. Despite this slowdown I did move up over 40 places in the second half.

    Food and water worked fine again with my own bag of jelly babies and kendal mint cake washed down by the supplied bottles. I really wasn't hungry or under fuelled at all after the pizza though. Perhaps with hindsight I could have splashed on a bit more water towards the end of the race when I wasn't interested in drinking. Fixing the left leg problem might have the biggest impact. It isn't causing a problem now three days later so there isn't a real injury problem, it's just not quite as good as the other one. Oh, and a pair of magic nike sub-2 shoes though even finding a pair would be a bit of a miracle. A 3 min PB is a pretty big improvement at this stage in my running career and at this age, but one disappointment with my result is that I didn't get quite as much as half-way to 2:45. That still seems like it may be a step too far for me. We'll see...

    Anyway, here is my official result and here it is on Strava: