Category Archives: transfer function

Autocorrelation in the testate amoeba calibration set

Amesbury et al examine the autocorrelation in their huge calibration set. I thought I would do the same, increasing the resolution of the analysis to get a better handle on what is going on. This is an RNE plot. It … Continue reading

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Testing testate amoeba: some comments on Amesbury et al (2018)

Today, I have been reading and thinking about a new paper presenting a huge testate-amoeba calibration set for reconstructing water table depth in bogs (Amesbury et al 2018). This calibration set, with almost 2000 samples, is the synthesis of many … Continue reading

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Introducing ggpalaeo

I’ve put some code I used for plotting figures for my soon-to-be-resubmitted manuscript into a package because I thought it might be useful to others. The main use of ggpalaeo is to make ggplot2 plots of transfer function diagnostics from … Continue reading

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Chironomids are cunning wee beasties

Since I had examined almost every aspect of the data from the remarkable Lake Żabińskie chironomid-inferred August air temperature reconstruction, some time last summer I thought that I would, for completeness, have a quick look at the instrumental temperature data. … Continue reading

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A mean wind blows over Lake Żabińskie

I have largely neglected the chrysophyte-inferred reconstructions of winter severity and summer calcium concentrations/zonal wind speed from Lake Żabińskie even though they fall within the scope of my review of sub-decadal resolution reconstructions. This is not because I think this … Continue reading

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Pollen from the garden of forking paths

Most transfer functions for reconstructing past environmental changes are based on a calibration-in-space approach, with a modern calibration set of paired microfossil assemblages and environmental data. The alternative approach is calibration-in-time, with well-dated fossil assemblages and contemporaneous environmental data. I’ve … Continue reading

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The third chironomid calibration-in-time reconstruction

Most reconstructions of past environmental conditions derived from chironomid assemblages with transfer functions use a calibration-in-space approach, in which the calibration is a set of modern chironomid assemblages paired with modern environmental data. I am aware of three chironomid calibration-in-time … Continue reading

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