close

Showing 4 of total 4 results (show query)

maarten14c

rbacon:Age-Depth Modelling using Bayesian Statistics

An approach to age-depth modelling that uses Bayesian statistics to reconstruct accumulation histories for deposits, through combining radiocarbon and other dates with prior information on accumulation rates and their variability. See Blaauw & Christen (2011).

Maintained by Maarten Blaauw. Last updated 1 months ago.

age-depth-modelbayesianholocenelakesocean-sedimentspeatradiocarbon-calibrationcpp

7 stars 6.80 score 57 scripts 1 dependents

maarten14c

coffee:Chronological Ordering for Fossils and Environmental Events

While individual calibrated radiocarbon dates can span several centuries, combining multiple dates together with any chronological constraints can make a chronology much more robust and precise. This package uses Bayesian methods to enforce the chronological ordering of radiocarbon and other dates, for example for trees with multiple radiocarbon dates spaced at exactly known intervals (e.g., 10 annual rings). For methods see Christen 2003 <doi:10.11141/ia.13.2>. Another example is sites where the relative chronological position of the dates is taken into account - the ages of dates further down a site must be older than those of dates further up (Buck, Kenworthy, Litton and Smith 1991 <doi:10.1017/S0003598X00080534>; Nicholls and Jones 2001 <doi:10.1111/1467-9876.00250>). The paper accompanying this R package is Blaauw et al. 2024 <doi:10.1017/RDC.2024.56>.

Maintained by Maarten Blaauw. Last updated 3 months ago.

7 stars 6.02 score 6 scripts

maarten14c

clam:Classical Age-Depth Modelling of Cores from Deposits

Performs 'classical' age-depth modelling of dated sediment deposits - prior to applying more sophisticated techniques such as Bayesian age-depth modelling. Any radiocarbon dated depths are calibrated. Age-depth models are constructed by sampling repeatedly from the dated levels, each time drawing age-depth curves. Model types include linear interpolation, linear or polynomial regression, and a range of splines. See Blaauw (2010) <doi:10.1016/j.quageo.2010.01.002>.

Maintained by Maarten Blaauw. Last updated 3 months ago.

age-depth-modelradiocarbon-calibration

3 stars 5.80 score 28 scripts

maarten14c

rplum:Bayesian Age-Depth Modelling of Cores Dated by Pb-210

An approach to age-depth modelling that uses Bayesian statistics to reconstruct accumulation histories for 210Pb-dated deposits using prior information. It can combine 210Pb, radiocarbon, and other dates in the chronologies. See Aquino et al. (2018) <doi:10.1007/s13253-018-0328-7>. Note that parts of the code underlying 'rplum' are derived from the 'rbacon' package by the same authors, and there remains a degree of overlap between the two packages.

Maintained by Maarten Blaauw. Last updated 3 months ago.

2 stars 3.94 score 11 scripts

: