Tag Archives: Larocque-Tobler et al (2011)

The tangled web of Silvaplana papers

Posted on 05/07/2018 by richard telford

I’ve not written much about the Lake Silvaplana papers although they are as questionable as the Seebergsee and Zabinskie papers. I have now digitised the 150-year stratigraphy, my request to the authors for the data having been ignored. Together with … Continue reading →

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Chironomid assemblage change in Seebergsee

Posted on 06/03/2018 by richard telford

Palaeoecology could, to a large extent, be described as the study of changes in fossil assemblages: what we can learn from changes in foraminifera assemblages over the last interglacial cycle, from palynological assemblages as Neolithic agriculture spread across Europe, or … Continue reading →

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A failed attempt to reproduce two ordinations

Posted on 15/02/2018 by richard telford

To examine the millennium-long chironomid-inferred air temperature reconstruction from Seebergsee (Larocque-Tobler et al 2012) is, after having shown that the calibration-in-time reconstruction for the upper section of the core (Larocque-Tobler et al 2011) has no skill, to flog the proverbial … Continue reading →

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Heavy weather at Seebergsee

Posted on 06/02/2018 by richard telford

Larocque-Tobler et al (2011) compare their chironomid-inferred reconstructions of July air temperature with instrumental data from Château-d’Oex, a climate station with continuous temperature data from 1901. Château-d’Oex is located less than 30km from Seebergsee (Larocque-Tobler et al (2011) report 50km), … Continue reading →

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The three chronologies from Seebergsee

Posted on 22/01/2018 by richard telford

Accurate and precise chronologies are important for all comparisons of palaeoecological records. This is especially true for the validation of sub-decadal resolution reconstructions against instrumental data: a chronological error of only a year or two will seriously degrade the apparent … Continue reading →

Posted in Age-depth modelling, Peer reviewed literature | Tagged , | 2 Comments

Seebergsee, Hamlet and the monkey

Posted on 19/01/2018 by richard telford

In my previous post, I showed that the calibration-in-time reconstruction from Seebergsee by Larocque-Tobler et al (2011) had not been cross-validated, and that once it had been cross-validated, the performance was terrible. Now it is time to look a little … Continue reading →

Posted in Peer reviewed literature, transfer function | Tagged , | 4 Comments

Calibration-in-time at Seebergsee

Posted on 16/01/2018 by richard telford

Most transfer functions for reconstructing palaeoenvironmental variables from microfossil assemblages use a modern calibration set of paired microfossil and environmental data from many sites. This is sometimes known as the calibration-in-space approach. An alternative approach adopted by a few papers … Continue reading →

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