Category Papers
Visualising weird input spaces
I’ve been working on a fairly large (~500 member) perturbed-parameter ensemble of the land surface model JULES. The model simulates the global historical land surface, and each ensemble member is forced by the same global reanalysis on the HadGEM2 grid scale. Differences in the model output are therefore caused by the different values of the […]
Sensitivity analysis with R
After last week’s post, I thought it might be useful to have some practical examples of how to do sensitivity analysis (SA) of complex models (like climate models) with an emulator. SA is one of those things that everyone wants to do at some point, and I’ll be able to point people here for code […]
On the existence of the hiatus
A new paper by Karl et al. in Science makes a spirited argument that there really is no “hiatus” or “slowdown” in global surface temperature warming. The paper focuses on some of the more technical details of bias correction in the temperature data record, rather than on the dynamics of the climate. It is from a […]
Internal variability in surface temperature and the hiatus
Our paper Quantifying the likelihood of a continued hiatus in global warming is published today in Nature Climate Change. Here is the New Scientist take, the Carbon Brief take, and the Met Office Research News article. Chris Roberts took on a huge task, processing massive amounts of data in the CMIP5 climate model archive, and leading […]
The great thing about UQ is we know how to spell it
It’s been pretty busy round these parts, here are a few notes from the last month or so. Natural variability – Energy budget Our paper on natural variability in the Earth’s energy budget got a nice write-up from John Abraham in the Guardian. Mat Collins happened to be passing, and took a nice picture of […]
Pausing for thought
I helped Ed and Tamsin to write a commentary on the communication of the “pause” in global surface warming, and it is online today at Nature Climate Change. We take a good look at the way the pause has been communicated and discussed by scientists and the media, offer some personal perspectives on engaging online, […]
On the value of observations
I’m pretty happy that our paper on finding the potential value of observations for constraining climate models, was published today in Geoscientific Model Development. I posted about the discussion paper here, and you can download a presentation describing the work here. The paper demonstrates a method for working out how useful a new observation might […]
CliMathNet
I’ve been at the CliMathNet meeting all week, featuring the complementary set of people that I didn’t see at IMSC. Here is the talk that I’ll be giving this morning, explaining some of the ideas in our paper on potential constraint of climate models.
When will the summer Arctic be nearly ice free?
This is a nice short and pleasingly informal summary of the latest work on predictions of loss of summer sea ice in the Arctic, published in GRL. The paper is perhaps more useful as an up-to-date literature review than an analysis paper, which is perhaps a kinder way of saying what Stoat says. The paper […]
Constraining climate models with observations
This post is an introduction to our new paper, The potential of an observational data set for calibration of a computationally expensive computer model, for non specialists. The paper is in open review, and so can be commented on by anybody. We would appreciate feedback, so please consider making a comment at the open review […]
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