R/HarvardForest14CO2.R

In SoilR: Models of Soil Organic Matter Decomposition

#' Delta14C in soil CO2 efflux from Harvard Forest
#'
#' @docType data
#' @format A data frame with the following 3 variables.  
#' \enumerate{
#'  \item Year 
#'    A numeric vector with the date of measurement in years
#'  \item D14C 
#'    A numeric vector with the value of the Delta 14C value measured in CO2 efflux in per mil
#'  \item Site 
#'    A factor indicating the site where measurements were 
#'    made. NWN: Northwest Near, Drydown:
#'    Rainfall exclusion experiment. 
#' }
#' 
#' @description
#' Measurements of Delta14C in soil CO2 efflux conducted at Harvard Forest,
#' USA, between 1996 and 2010.
#' 
#'
#' @details
#' Samples for isotopic measurements of soil CO2 efflux were collected from
#' chambers that enclosed an air headspace in contact with the soil surface in
#' the absence of vegetation using a closed dynamic chamber system to collect
#' accumulated CO2 in stainless steel traps with a molecular sieve inside. See
#' Sierra et al. (2012) for additional details.
#'
#' @examples
#' plot(HarvardForest14CO2[,1:2])
#' 
#' @references
#' Sierra, C. A., Trumbore, S. E., Davidson, E. A., Frey, S. D.,
#' Savage, K. E., and Hopkins, F. M. 2012. Predicting decadal trends and
#' transient responses of radiocarbon storage and fluxes in a temperate forest
#' soil, Biogeosciences, 9, 3013-3028, doi:10.5194/bg-9-3013-2012
#' 
#' @keywords datasets
'HarvardForest14CO2'