Tag Archives: Larocque-Tobler et al (2015)

Cromwell’s rule is over

Of one thing I am certain: count data should be integers (or half integers if partial individuals are counted as one half). The chironomid data from Lake Żabińskie are remarkable in many respects; surely they meet this most basic expectation. … Continue reading

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Ordinating Lake Żabińskie’s chironomids

Fossil stratigraphies are highly multidimensional – many species, many samples – which makes it difficult to visualise the main patterns in the data. One way to cope is to use ordinations to find the main axes of variability in the … Continue reading

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Reconstruction diagnostics for the Lake Żabińskie chironomid reconstruction

The evaluation of reconstruction diagonstics is an essential part of the process of generating palaeoenvironmental reconstructions from microfossil assemblages using transfer functions. If the reconstruction diagnostics are bad, we should be especially cautious about interpreting the reconstruction. The problems is … Continue reading

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Curious chironomid counts

In January 2015, shortly after Larocque-Tobler et al published their remarkably good chironomid-inferred August air temperature reconstruction from Lake Żabińskie, Poland, some data were posted online as a condition of publication. Since I found it difficult to believe that chironomids could … Continue reading

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The limits of high-resolution quantitative palaeoecology and Larocque-Tobler et al (2015)

The first quantitative palaeoclimate reconstructions from microfossil assemblages were low resolution, with a sample spacing of hundreds or thousands of years and focused on seasonal climate. Reconstructions focusing on a single month are now published at annual resolution. Can resolution … Continue reading

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50 chironomids or fewer – corrigendum for Larocque-Tobler et al 2015

Last year, Isabelle Larocque-Tobler and coauthors published a chironomid-inferred August air-temperature reconstruction for the 20th century from a Polish lake in Quaternary Science Reviews. The correlation between instrumental temperature records and the near-annual resolution reconstruction from Lake Żabińskie is remarkably … Continue reading

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