CLAMP Calibration Data Sets
The CLAMP datasets consist of pairs spreadsheets. Each pair consists of a file containing physiognomic data from vegetation sites and a file containing the corresponding meteorological data from that same suite of sites. To see how to view the locations of the vegetation sites using Google Earth click here.
The Physg3brcAZ Calibration
The smallest set consists of 144 modern vegetation sites predominantly from the Northern Hemisphere temperate regions. This data set lacks samples belonging to the "alpine nest". Samples from areas that experience extreme cold tend to have very small leaves that lack teeth. As a result the predicted temperature tends to be anomalously high (Wolfe, 1993) although this anomally can be detected by detailed examination of the position of the fossil site in physiognomic space. Unless winter temperatures below freezing are suspected it is usually better to use this 144 site data set.
Download the Excel 5.0 file of the Physg3brcAZ (144) site physiognomic data (98KB)
Download the Excel 5.0 file of the Met3brAZ (144) site meteorological data (37KB)
As an alternative to the Met3brAZ file you might want to consider the gridded meteorological data in GRIDMet3brcAZ.
To see the scoresheets for the Physg3a/brcAZ datasets click here.
The Physg3arcAZ Calibration
The second set consists of 173 modern vegetation sites, again predominantly from the Northern Hemisphere but this set includes samples from areas experiencing pronounced winter cold.
Download the Excel 5.0 file of the Physg3arcAZ (173) site physiognomic data (111KB)
Download the Excel 5.0 file of the Met3arAZ (173) site meteorological data (45KB)
As an alternative to the Met3arAZ file you might want to consider the gridded meteorological data in GRIDMet3arcAZ.
To see the scoresheets for the Physg3a/brcAZ datasets click here.
The PhysgAsia Calibrations
There are two calibration data sets suitable for monsoon climates. For more information on these, and for access to the files, click here.
The Southern Hemisphere Calibration
Click here for the calibration files and scoresheets for a collection of 90 sites from the Southern Hemisphere as described in Kennedy et al. (2014).
The PhysgGlobal Calibration
The final data set currently available is one that consists of 378 sites from all continents except Antarctica. Because this data set encompasses a wide range of climates and the associated leaf form adaptations the structure of physiognomic space is complex. This complexity means that a simple vector can only poorly summarise this complexity and the resulting regressions have higher standard deviations that the smaller data sets. This data set is offered for initial exploration purposes. Seeing where a fossil site plots within this space can help determine which of the standard calibration sets is most appropriate for your analysis. For more information on this calibration and for access to the files click here.
 |
|
| A CLAMP sampled forest in Kerala, southern India. |
