| intcal.data {IntCal} | R Documentation |
plot the IntCal20 data
Description
plot the C14 ages underpinning the IntCal20/Marine20/SHCal20 calibration curves
Usage
intcal.data(
cal1,
cal2,
cc1 = "IntCal20",
cc2 = NA,
calcurve.data = "IntCal20",
BCAD = FALSE,
cal.lab = NA,
cal.rev = FALSE,
c14.lab = NA,
c14.lim = NA,
c14.rev = FALSE,
ka = FALSE,
cc1.col = rgb(0, 0, 1, 0.5),
cc1.fill = rgb(0, 0, 1, 0.2),
cc2.col = rgb(0, 0.5, 0, 0.5),
cc2.fill = rgb(0, 0.5, 0, 0.2),
data.cols = 1:8,
data.pch = c(1, 2, 5, 6, 15:19),
pch.cex = 0.5,
legend.loc = "topleft",
legend.ncol = 2,
legend.cex = 0.7,
cc.legend = "bottomright",
bty = "l",
...
)
Arguments
cal1 |
First calendar year for the plot |
cal2 |
Last calendar year for the plot |
cc1 |
Name of the calibration curve. Can be "IntCal20", "Marine20", "SHCal20", or for the previous curves "IntCal13", "Marine13" or "SHCal13". |
cc2 |
Optional second calibration curve to plot. Can be "IntCal20", "Marine20", "SHCal20", or for the previous curves "IntCal13", "Marine13" or "SHCal13". Defaults to nothing, NA. |
calcurve.data |
Which dataset to use. Defaults to |
BCAD |
The calendar scale of graphs and age output-files is in cal BP (calendar or calibrated years before the present, where the present is AD 1950) by default, but can be changed to BC/AD using |
cal.lab |
The labels for the calendar axis (default |
cal.rev |
Reverse the calendar axis. |
c14.lab |
Label for the C-14 axis. Defaults to 14C BP (or 14C kBP if ka=TRUE). |
c14.lim |
Axis limits for the C-14 axis. Calculated automatically by default. |
c14.rev |
Reverse the C-14 axis. |
ka |
Use kcal BP (and C14 kBP). |
cc1.col |
Colour of the calibration curve (outline). |
cc1.fill |
Colour of the calibration curve (fill). |
cc2.col |
Colour of the calibration curve (outline), if activated (default cc2=NA). |
cc2.fill |
Colour of the calibration curve (fill), if activated (default cc2=NA). |
data.cols |
colours of the data points. Defaults to R's colours 1 to 8 (black, red, green, darkblue, lightblue, purple, orange, and grey) |
data.pch |
Symbols of the data points. Defaults to R's symbols 1, 2, 5, 6, and 15 to 19 (open circle, open upward triangle, open diamond, open downward triangle, closed square, closed circle, closed upward triangle, closed diamond) |
pch.cex |
Size of the data symbols. Defaults to 0.5. |
legend.loc |
Location of the data legend. Defaults to topleft. Set to NA for no plotting. |
legend.ncol |
Number of columns of the data legend. |
legend.cex |
Size of the legend. Defaults to 0.7. |
cc.legend |
Location of the legend for the calibration curve(s). |
bty |
Box type around the plot. Defaults to "l"-shaped. |
... |
Any additional optional plotting parameters. |
Details
These datasets were downloaded from Intcal.org. All data have both uncertainties in C14 age and on the calendar scale. For trees this is the sample thickness (e.g., 10 years or 1 year). The name of each dataset starts with a lower-case letter which indicates their nature (t = tree-rings, l = lake sediment, c = coral, m = marine sediment, s = speleothem), followed by either the radiocarbon laboratory's placename or the lastname of the main author. Most of the tree-ring datasets are dated at calendar year precision; tSeattle (references 1-2), tBelfast (3-5), tWaikato (4-7), tGroningen (8-10), tHeidelberg (11-14), tPretoria (16), tIrvine (17-20), tGalimberti (21), tMannheim (22-25), tAix (26-27), tAarhus (22, 28-30), tManningKromer (31-32), tVienna (33-34), tTokyo (35-39), tArizona (40), tMiyake (41), tPearson (22, 41-45), and tZurich (22-23, 25, 41, 43, 46-49). Horizontal error bars for these series indicate the numbers of rings in the samples (e.g., 10 tree-rings; 1-yr samples do not have error bars). Additionally, there are some floating tree-ring datasets with imprecisely known calendar ages; tAdolphy (50) and tTurney (51-52). For these and the following datasets, horizontal error bars indicate their 1 sd calendar age uncertainties. Beside trees, other datasets include lake sediment (lSuigestu, 53-54), corals (cBard 55-56, cFairbanks 57, cCutler 58 and cDurand 61, marine sediment (mCariaco 59-60, 62-63, mBard 64-65) and speleothems (sSouthon 66-67, sHoffman 68, sBeck 69). The southern hemisphere calibration curve SHCal20 is mostly modelled on IntCal20, but it contains datasets from the southern hemisphere; tPretoria (70), tWaikato (72-75), tBelfast (76-67), tSydney (78-80), tLivermore (81), tArizona, tIrvineWaikato and tZurich (82-83).
References
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[71] Stuiver, Braziunas 1998. Anthropogenic and solar components of hemispheric 14C. Geophysical Research Letters 25: 329-332.
[72] Hogg et al. 2002 High-precision radiocarbon measurements of contemporaneous tree-ring dated wood from the British Isles and New Zealand: AD 1850-950. Radiocarbon 44: 633-640.
[73] McCormac et al. 1998. Temporal variation in the interhemispheric C-14 offset. Geophysical Research Letters 25: 1321-1324.
[74] Hogg et al. 2011 High-precision radiocarbon measurements of tree-ring dated wood from New Zealand: 195 BC-AD 995. Radiocarbon 53, 3: 529-542.
[75] Hogg et al. 2013 Is there any evidence for regional 14C offsets in the Southern Hemisphere? doi: 10.2458/azu_js_rc.v55i2.16104
[76] Hogg et al. 2002 High-precision radiocarbon measurements of contemporaneous tree-ring dated wood from the British Isles and New Zealand: AD 1850-950. Radiocarbon 44: 633-640.
[77] McCormac et al. 1998. Temporal variation in the interhemispheric C-14 offset. Geophysical Research Letters 25: 1321-1324.
[78] Hua et al. 2009 Atmospheric 14C variations derived from tree rings during the early Younger Dryas. Quaternary Science Reviews, v. 28, 25-26: 2982-2990.
[79] Hua et al. 2004 Radiocarbon in tropical tree rings during the Little Ice Age. Nuclear Instruments and Methods in Physics Research B 223-224:489-94.
[80] Hogg et al. 2013 SHCal13 Southern Hemisphere calibration, 0-50,000 cal yr BP. Radiocarbon 55, 2
[81] Zimmerman et al. 2010 Extension of the Southern Hemisphere atmospheric radiocarbon curve, 2120-850 years BP: results from Tasmanian huon pine. Radiocarbon 52, 203: 887-94.
[82] Boentgen et al. 2018 Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE. Nature Communications, 9: 3605. doi:10.1038/s41467-018-06036-0. [83] Sookdeo et al. 2020 Quality Dating: A well-defined protocol implemented at ETH Zurich for high-precision 14C dates tested on Late Glacial wood. Radiocarbon. doi: 10.1017/RDC.2019.132
Examples
intcal.data(100, 200)
intcal.data(40e3, 55e3, ka=TRUE)