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flux (version 0.3-0)

Flux rate calculation from dynamic closed chamber measurements

Description

Functions for the calculation of greenhouse gas flux rates from closed chamber concentration measurements. The package follows a modular concept: Fluxes can be calculated in just two simple steps or in several steps if more control in details is wanted. Additionally plot and preparation functions as well as functions for modelling gpp and reco are provided.

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Version

Install

install.packages('flux')

Monthly Downloads

374

Version

0.3-0

License

GPL-2

Maintainer

Gerald Jurasinski

Last Published

April 25th, 2014

Functions in flux (0.3-0)

inspect

Inspect and alter prepared ghg concentration data
lips

Linear interpolation between data points similar to approx.
append.df

Append a data.frame to another including consistency checks
amc

Climate station data from 2009 to 2011 in the Ahlenmoor peat bog, Northeast Germany
flux.calib

Determine calibration measurement ranges according to the dates of real measurements
reco.bulk

Bulk fitting of Reco and GPP models
budget.ie

Estimate interpolation errors for GPP and Reco budgets
auc

Calculate the area under a line(curve).
export

simple export wrapper
tt.pre

One day data from closed chamber measurements in the Trebeltal
plot.gpp

Plot diagnostic plots for GPP (NEE) models derived with reco and gpp.
tt.nee

Medium frequency concentration data and fluxes from non-steady state closed chamber measurements
budget.reco

Predict fluxes from GPP and Reco models and prepare for summing them up to budgets.
flux-package

Flux rate estimation with dynamic closed chamber data
plot.reco

Plot diagnostic plots for Reco models.
gflux

Calculate gas flux rate from two concentrations
plot.fluss

Functions for bulk plotting of concentration change with time as kind of diagnostic plots for flux rate calculations
reco

Model R_eco from CO2 exchange closed chamber data.
fluxx

Estimate (ghg) flux rates from online dynamic closed chamber measurements in through-flow mode.
gpp

Model GPP from CO2 closed chamber flux data
round.POSIXlt

Round times.
flux-internal

Internal functions of the package flux that are usually not called (or only implicitly) by the user
tbl8

Extract the relevant data of a bulk model object to a data.frame
flux

Estimate gas flux rates using non-steady-state closed chamber data
checkm

Bring modelled and measured values together based on timestamp
modjust

Adjust Reco models
chop

Prepare data for flux rate estimation with flux or GPP/Reco modelling.
amd

Closed chamber fluxes from 2009 to 2011 in the Ahlenmoor peat bog, Northeast Germany