SuessR (version 0.1.6)

reg.uptake: Calculate a regional carbon dioxide uptake constant from empirical DIC data

Description

The reg.uptake() function calculates the regional uptake constant required to modify the global Suess effect curve to be region-specific.

Usage

reg.uptake(year1, year2, d13c.change)

Value

Returns a numerical value representing the regional uptake constant. This value can be supplied as part of the 'custom.region.data' (filling a column titled 'up.con') argument for the SuessR.custom() function.

Arguments

year1

The year in which samples were collected for the first set of DIC δ¹³C
observations.

year2

The year in which samples were collected for the second set of DIC δ¹³C
observations.

d13c.change

The observed change in DIC δ¹³C between the two years.

Details

This function calculates the regional uptake constant used to modify the global Suess effect curve to make it specific to a region. This method requires δ¹³C values for DIC from the area of interest from two different time points, ideally separated by at least a decade. The function uses the magnitude (i.e., absolute value) of the observed change in DIC δ¹³C ('d13c.change'), the year of the first observation ('year1'), and the year of the second observation ('year2') to calculate the regional uptake constant. This value can then be supplied as part of the 'custom.region.data' argument (filling a column titled 'up.con') for the SuessR.custom() function.

Examples

year1 <- 1970
year2 <- 1980
d13c.change <- 0.3

reg.uptake(year1 = year1, year2 = year2, d13c.change = d13c.change)