Category Archives: transfer function

Air temperature, lake temperature

I’m interested in lake temperatures because I want to go swimming. I’m also interested because some palaeolimnological proxies, for example chironomids, are probably most sensitive to water temperature but are calibrated against and used to reconstruct air temperature. The stronger … Continue reading

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There is a memory in the dirt at the bottom of the sea

There is a memory in the dirt at the bottom of the sea. It is in the number of different sorts of small dead animals which we can use to find out how warm or cold the sea was in … Continue reading

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Are Tibetan chironomids mesmerised by solar variability?

It’s been a while since I examined a paper that purports to present palaeoecological evidence for a climate response to solar variability. But last night, flicking through the recently published papers in Quaternary Science Reviews, I came across Zhang et … Continue reading

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Chironomid vs pollen: Holocene climate change in southern Europe

Pollen-inferred summer temperature reconstructions from southern Europe show cool early-Holocene summers and warmer late-Holocene summers (Davis et al 2003, Mauri et al 2015). In contrast,  warm early-Holocene summers are reconstructed elsewhere in Europe and most of the mid-high latitude Northern … Continue reading

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Performance of chironomid-temperature transfer functions

Chrironomid (non-biting midges) are sensitive to temperature (Eggermont and Heiri 2011), and because their head-capsules preserve well in lake sediments, their fossil assemblages can be use to reconstruct past temperature with a transfer function trained on the chironomid-temperature relationship in … Continue reading

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why would anyone not trust the author????

I have already shown that ordinations of the Lake Żabińskie fossil assemblages are weirder than you ever imagined possible. Now it is time to look at figure 2 of Larocque-Tobler et al (2015) which shows an ordination of the chironomid … Continue reading

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73 lakes become 78

I have detailed many curious aspects of the remarkable Lake Żabińskie August air-temperature reconstruction by Larocque-Tobler et al (2015). This posts describes yet more – this time in Supplementary Data Figure 1 which shows a redundancy analysis (a type of … Continue reading

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