When Greenland ice melt data are correctly presented, Greenland it has in fact decelerated recently, thus contradicting alarmist claims by a new paper’s authors.
By Uli Weber
(Translated/edited by P Gosselin)
Already in January 2019 a very peculiar scientific publication on the allegedly increasing glacier melt had been a topic here on Die Kalte Sonne under the title ‘Faktenwäsche’? (fact laundering?,) which came to a very different result.
Result: From the diagrams A to D by Bevis et al. (2019) it can be deduced that, contrary to the predicted trend, the loss of Greenland ice mass has decreased considerably since 2013.”
There a peculiar time axis jump in diagram “D” to support the alarmist statement in question had become apparent:
“In diagram ‘D’ it is also noticeable that the residuals are shown on a shortened time scale only until mid-2014, instead of showing the complete data set until mid-2015.”
The questionable depiction looks like this, paying particular attention to the black arrows between illustrations (B) and (D) in the area of the time axis of (B):
Figure: Diagram B to D from Fig. 1 of Bevis et al. (2019). Source: Michael Bevis et al.: Accelerating changes in ice mass within Greenland, and the ice sheet’s sensitivity to atmospheric forcing, PNAS published ahead of print January 22, 2019 https://doi.org/10.1073/pnas.1806562116 (Open access article distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND))
We also stated at the time: “The residuals in diagram “D” are therefore missing for a whole year, although the corresponding data for the period from mid-2014 to mid-2015 have already been shown in diagram “B”. This circumstance was compensated for by stretching the time axis in diagram “D” to the time axis of diagram “B” and marking the time jump between the two diagrams of about one year with black arrows.”
It is a very peculiar situation when an erroneous and highly manipulative image is released for non-commercial reproduction, but no changes are allowed to display it correctly. Today, however, modern software offers functions with which such problems can be overcome, for example with an overlay over the unchanged original image.
If one scales the time axis of the residuals (D) to that of the ice loss curve (B) and adds the missing data in a separate overlay, there is no “pause” for the period 2013/2014, but rather a clear mass increase since 2013 for the glacier ice, which is supposedly melting more and more.
Figure: Overlay of the authors diagram plus original diagram (D) from Fig. 1 of Bevis et al. (2019) https://doi.org/10.1073/pnas.1806562116 (Merely changing the format never creates a derivative). Note: The red bordered overlay is an own work of the author, which shows the data missing from diagram (B) of Bevis et al. (2019) but only graphically.
The arbitrary shortening of a comparative time series while simultaneously stretching the relevant time scale, from which a decisive argumentative conclusion is then derived, is no coincidental technical oversight. It is clearly a targeted data manipulation to support an alarming statement, which, if the underlying data had been correctly presented, would show the opposite:
No more alarm: the ice melt on Greenland has slowed significantly since 2013.
Conclusion: The well-known “illi omnia experti” from Caesar’s “De bello Gallico” does not mean that all the experts mentioned there were experts, but rather that they merely tried everything. And this is exactly the same with the climate policy “experts”, as they as well are doing everything they can to help a global climate religion achieve a breakthrough. So they are not climate scientists at all, but climate climate religious missionaries – and they are cleverly misusing the credibility of science as a vehicle for spreading their climate ideology. Modern natural sciences, of all things, were once an essential instrument of the Enlightenment, which finally freed us from a strictly religious absolutism.