compute_simplifiedDWCI: simplified Diurnal water:carbon index (DWCI)

In bgctw/etpart: Partitioning evapotranspiration into transpiration and evaporation

Description

similar to DWCI it measures the probability that the carbon and water are coupled within a given day. In difference to the full DWCI the correlation only the standard deviation of ET and GPP is used but not the daily correlation between NEE and ET errors. Hence, it can be used when noisefree, i.e. modelled, NEE_fall and ET_fall are not available.

Usage

compute_simplifiedDWCI(data, nrecday = 48, na_value = 0)

Arguments

data	data.frame of sub-daily timeseries with variables Rg_pot Potential radiation ET evapotranspiration or latent energy GPP ross primary productivity VPD vapor pressure deficit NEE net ecosystem exchange ET_sd estimation of the uncertainty of ET GPP_sd eestimation of the uncertainty of GPP
nrecday	integer: frequency of the sub-daily measurements, 48 for half hourly measurements'
na_value	numeric scalar: to replace NA values in correlation Defaults to 0.0 - i.e. no probability of correlation in DWCI.

Value

numeric vector length(data)/nrecday: diurnal water:carbon index (DWCI)

bgctw/etpart documentation built on Dec. 19, 2021, 8:49 a.m.