Tag Archives: diatoms

My presentation to IPA-IAL 2018

I’ve just given a presentation at the joint IPA-IAL conference in Stockholm Sub-decadal resolution palaeoenvironmental reconstructions from microfossil assemblages Download it! The deadline for applying for a reward for finding typos has expired. Advertisements

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Sub-decadal resolution reconstructions

I’m putting together my review of sub-decadal resolution reconstructions from microfossil assemblages and thought I ought to check if I have missed any. The criteria are: Palaeoenvironmental reconstruction from microfossil assemblages Sub-decadal resolution – at least one fossil sample per … Continue reading

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Diatoms, running correlations and solar variability

Almost two years ago, I wrote a post about running correlations and their problems. It is still a well read post. I wish it was better read. It is not that running correlation cannot be be a useful tool. If a … Continue reading

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Did the Sun tickle the diatoms of Disko Bugt?

Diatoms, transfer functions and claims of palaeoecological evidence of solar variability: how could I resist discussing Sha et al. (2014)? Sha et al develop a diatom-sea ice transfer function and apply it to a diatom record from a core from … Continue reading

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Diatoms, sea-ice and temperature

Diatoms make good proxies for palaeoenvironmental reconstructions: their exquisite silica cell walls can be identified to species level (mostly); they preserve well in sediments (usually) and they are sensitive to multiple environmental variables. Being sensitive to multiple environmental variables is … Continue reading

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Status of palaeoceanographic transfer functions

A wide variety of microfossil groups have been used to generate quantitative reconstructions of palaeoceanographic conditions. This post lists the species groups used, the variables reconstructed with them, with some comments on the availability of the data. This list is … Continue reading

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Flickering diatoms: A comment on Wang et al (2012)

In November 2012, Wang et al (2012) reported evidence of precursor signals of a critical ecosystem transition in a diatom stratigraphy from Erhai, a lake in Yunnan, China. Today, Jacob Carstensen, John Birks and I have published a comment in Nature that … Continue reading

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