Tag Archives: diatoms

Double diatoms

Posted on 16/05/2019 by richard telford

I am in awe of Dr Elisabeth Bik and her amazing ability and dedication to spotting duplications in images. A new thread on – what appears to be – an obviously photoshopped image by Andrzej N released by @NatGeoMagI guess … Continue reading →

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My presentation to IPA-IAL 2018

Posted on 19/06/2018 by richard telford

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.

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Sub-decadal resolution reconstructions

Posted on 25/04/2018 by richard telford

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

Posted on 22/02/2015 by richard telford

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?

Posted on 11/10/2014 by richard telford

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

Posted on 07/10/2014 by richard telford

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

Posted on 02/10/2013 by richard telford

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)

Posted on 26/06/2013 by richard telford

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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