Misc. Debris

Misc. Debris contains a list of "blog" posts. I do however not allow comments on this site (Due to limitations of the service i use to host this site).

Recent Debris

  • Plausible upper limit of WAIS ice loss Ritz et al. (2015) have a recent model study of potential sea level rise from Antarctic marine ice sheet instability. In it they conclude:"Our assessment suggests that upper-bound ...
    Posted Dec 15, 2015, 3:09 PM by Aslak Grinsted
  • Digitizing pdf figures using inkscape I recommend using inkscape if you want to digitize a vector figure from a pdf file. Here's how you do that. Open Inkscape.In [inkscape preferences]-[svg output] disallow ...
    Posted Sep 30, 2015, 12:04 AM by Aslak Grinsted
  • More and Stronger Hurricane surges I thought I would share this quite illustration on how to interpret changes in return period/return magnitude plots. Data on hurricane surges along the US Atlantic and gulf coasts ...
    Posted Sep 30, 2015, 12:05 AM by Aslak Grinsted
  • Sea level, the moon, and Frankenstein Jens Morten Hansen (JMH) and co-authors have recently published a study where they use sine-regression to fit 5 oscillations plus a linear trend to a 160-year sea ...
    Posted Sep 25, 2015, 5:23 AM by Aslak Grinsted
  • Ice sheet pessimists are not outliers Bamber and Aspinall 2013 published a formal expert elicitation on the future of our two ice sheets, and found a large spread between individual expert answers. It has been argued ...
    Posted May 27, 2015, 7:03 AM by Aslak Grinsted
  • Loading MOLA PEDR files in matlab I have written a little matlab function to read the MOLA laser altimeter data from the Mars Global Surveyor.  More specifically the so called Precision Experiment Data Records (PEDR) records ...
    Posted May 19, 2015, 6:30 AM by Aslak Grinsted
  • Thoughts on the Pachauri harassment case Pachauri has been accused of sexual harassment. You can read about it here:http://indianexpress.com/article/india/india-others/delhi-police-fir-against-r-k-pachauri-on-charges-of ...
    Posted Sep 9, 2015, 1:21 AM by Aslak Grinsted
  • A better windows experience ChocolateyChocolatey is a package manager sort of like apt-get for windows, or a command-line version of ninite. You can do stuff like:choco install <packagename> Usually you ...
    Posted Mar 9, 2015, 4:11 AM by Aslak Grinsted
  • Bayesian exercises for Inverse problems Below is a pdf with some exercises for that i use in my course on inverse problems.Problem 0: Goal understand why it is attractive to use loglikelihoods over likelihoods ...
    Posted Oct 23, 2014, 4:18 AM by Aslak Grinsted
  • Tracking ice motion in Landsat 8 I have been attempting to track ice motion in landsat 8 files. I have only been able to find the L1T files. These are terrain corrected files. Unfortunately for my ...
    Posted Jun 11, 2014, 1:57 AM by Aslak Grinsted
  • West Antarctic collapse in the IPCC reports I have extracted some quotes from the IPCC reports since 1990 showing how West Antarctic Ice Sheet collapse has been discussed over time. It is not an exhaustive list.FAR ...
    Posted Jan 7, 2015, 11:36 PM by Aslak Grinsted
  • What does "likely" mean? It can be quite difficult to interpret what likely exactly means sometimes. For example in the AR5 sea level chapter they report a likely range of 21-33 cm for ...
    Posted May 14, 2014, 5:34 AM by Aslak Grinsted
  • Vulnerability of marine based sectors of Antarctica Should we take the risk of Antarctic collapse seriously?The IPCC AR5 sea level chapter considered instability of marine-based sectors of the ice sheets to be unlikely (Church et ...
    Posted Nov 3, 2014, 11:38 PM by Aslak Grinsted
  • EGU 2014 Me at EGU 2014:Convening the sea level session (Friday afternoon – you are welcome!)Surface velocities at Engabreen produced from time-lapse feature tracking (Alex)Sea level projections from FAR ...
    Posted Apr 16, 2014, 5:23 AM by Aslak Grinsted
  • Comparison of sea level projections I have been making a nice figure which compares the 21stC sea level projections from the AR5, with previous IPCC reports, Semi empirical models, and an expert elicitation ... I hope ...
    Posted Oct 23, 2014, 5:10 AM by Aslak Grinsted
  • Optimistic & over-confident ice sheet projections in AR5 Take away message: The graph on the right shows that AR5 process based ice sheet projections are optimistic and over confident when compared to views of ice sheet experts. To ...
    Posted Oct 8, 2015, 5:01 AM by Aslak Grinsted
  • AR5 sea level rise uncertainty communication failure I am disappointed in how the sea level rise projection uncertainties are presented in the IPCC AR5. The way the numbers are presented makes people believe 98 cm by 2100 ...
    Posted Oct 23, 2014, 5:05 AM by Aslak Grinsted
  • Can process models close the sea level budget? Before we can trust the projected models of sea level rise then it is reasonable to demand that these models can match the record of global mean sea level rise ...
    Posted Nov 20, 2013, 1:33 AM by Aslak Grinsted
  • Return period of Boulder 2013 extreme rain Several media stories on the Colorado floods talk of it as a 1000-year flood. However, the original source of this claim was talking about a 1000-year precip event ...
    Posted Nov 20, 2013, 1:30 AM by Aslak Grinsted
  • Trends in extreme hurricane damage I have downloaded the ICAT damage estimates of normalized hurricane damages(/losses) and looked at the trends in the data. This series is often used to argue that there is ...
    Posted Nov 20, 2013, 1:34 AM by Aslak Grinsted
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