Category Archives: Uncategorized

Odd ordination of the day

Your challenge is to identify half a dozen unexpected features in this Detrended Constrained Correspondence Analysis from Larocque-Tobler (2010). Bonus points if you can interpret the last two sentences of the caption. Advertisements

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Pollen Spikes

Relative pollen abundance data can be difficult to interpret. If percent Pinus increases, it could be because pine trees became more common, or because other species became rarer. Pollen concentration (or ideally influx rates) can help resolve what is happening. … Continue reading

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Forthcoming quantitative palaeoecology PhD and Postdoc positions in Bergen

There are vacancies for a 3-year PhD position and a 3-year post-doctoral fellow position at the University of Bergen’s Department of Biology within the Ecological and Environmental Change Research Group as part of the European Research Council funded project Humans … 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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Abstract abstracts

So I am searching through the Web of Science for papers reporting 11 yr (Schwabe) cycles in palaeoproxy data (especially tree-rings) when I find this title, which looks promising: LUNI-SOLAR 18.6-YEAR AND SOLAR-CYCLE 10-11-YEAR SIGNALS IN CHINESE DRYNESS WETNESS INDEXES … Continue reading

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Dinocysts, transfer functions and spatial autocorrelation: part 1207

I don’t always comment on papers that use transfer functions but neglect to consider how spatial autocorrelation in the modern calibration set might make the reconstructions spuriously precise. It gets tedious, especially when the same authors make the same mistakes … Continue reading

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Critical perspectives in climate reconstructions from pollen

This week I am at Caux, high above Lac Léman, Switzerland, attending a Pollen Climate Model Intercomparison Project workshop. The invited talk I gave this morning talk was on   Critical_Issues_in_pollen_climate_reconstructions. (I’ve made the ioslides presentation into a pdf – … Continue reading

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