flux (version 0.2-2)

flux-package: Flux rate estimation with dynamic closed chamber data

Description

Several functions for the estimation of greenhouse gas flux rates using dynamic 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 is wanted.

encoding

UTF-8

Details

ll{ Package: flux Type: Package Version: 0.2-2 Date: 2013-10-01 License: GPL-2 LazyLoad: yes } Obtain flux rates from many chamber measurements within minutes. After preparing the read in data (Field or device measured concentration data on the three most prominent greenhouse gases) with chop just run flux or fluxx (for medium frequency data) on the result returned by chop and get flux rates in an easy to interpret table including quality flags. Plot diagnostic plots as pdf per factor level to a folder or simply to the screen. Use gpp to model GPP and reco to model ecosystem respiration. Several helper functions for ghg analysis are also provided.

References

Nakano T (2004) A comparison of regression methods for estimating soil- atmosphere diffusion gas fluxes by a closed-chamber technique. Soil Biology and Biochemistry 36: 107-113.

Forbrich I, Kutzbach L, Hormann A, Wilmking M (2010) A comparison of linear and exponential regression for estimating diffusive CH4 fluxes by closed- chambers in peatlands. Soil Biology and Biochemistry 42: 507-515.

See Also

HMR for a different approach to flux rate estimation from chamber data.