partitionNEEGL: partitionNEEGL

Description Usage Arguments Value Author(s) References See Also

View source: R/PartitioningLasslop10.R

Description

Partitioning NEE fluxes into GP and Reco after daytime method of Lasslop et al. (2010) daytime-based partitioning of measured net ecosystem fluxes into gross primary production (GPP) and ecosystem respiration (Reco)

Usage

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partitionNEEGL(ds, NEEVar.s = paste0("NEE", SuffixDash.s, 
    "_f"), QFNEEVar.s = paste0("NEE", SuffixDash.s, 
    "_fqc"), QFNEEValue.n = 0, NEESdVar.s = paste0("NEE", 
    SuffixDash.s, "_fsd"), TempVar.s = paste0("Tair_f"), 
    QFTempVar.s = paste0("Tair_fqc"), QFTempValue.n = 0, 
    VPDVar.s = paste0("VPD_f"), QFVPDVar.s = paste0("VPD_fqc"), 
    QFVPDValue.n = 0, RadVar.s = "Rg", PotRadVar.s = "PotRad_NEW", 
    Suffix.s = "", controlGLPart = partGLControl(), 
    isVerbose = TRUE, nRecInDay = 48L)

Arguments

ds

dataset with all the specified input columns and full days in equidistant times

NEEVar.s

Variable of Net Ecosystem Exchange flux

QFNEEVar.s

Quality flag of variable

QFNEEValue.n

Value of quality flag for _good_ (original) data

NEESdVar.s

Variable of standard deviation of net ecosystem fluxes

TempVar.s

Filled air or soil temperature variable (degC)

QFTempVar.s

Quality flag of filled temperature variable

QFTempValue.n

Value of temperature quality flag for _good_ (original) data

VPDVar.s

Filled Vapor Pressure Deficit - VPD - (hPa)

QFVPDVar.s

Quality flag of filled VPD variable

QFVPDValue.n

Value of VPD quality flag for _good_ (original) data

RadVar.s

Unfilled (original) radiation variable

PotRadVar.s

Variable name of potential radiation (W/m2)

Suffix.s

string inserted into column names before identifier (see sMDSGapFillAfterUstar).

controlGLPart

further default parameters, see partGLControl

isVerbose

set to FALSE to suppress output messages

nRecInDay

number of records within one day (for half-hourly data its 48)

Value

data.frame with columns

Reco_DT_<suffix>

predicted ecosystem respiraiton: mumol CO2/m2/second

GPP_DT_<suffix>

predicted gross primary production mumol CO2/m2/second

FP_VARnight

NEE filtered for nighttime records (others NA)

FP_VARday

NEE filtered for daytime recores (others NA)

NEW_FP_Temp

temperature after filtering for quality flag degree Celsius

NEW_FP_VPD

vapour pressure deficit after filtering for quality flag, hPa

FP_R_refNight

basal respiration estimated from LRC of daytime window (W/m2)

FP_R_ref

basal respiration estimated from LRC of daytime window (W/m2)

FP_E0

temperature sensitivity estimated from nighttime NEE window in Kelvin (degK)

FP_alpha

canopy light utilization efficiency and represents the initial slope of the light-response curve (mumol s-1 W)

FP_beta

maximum CO2 uptake rate of the canopy at light saturation (mumol m-2 s-1)

FP_k

parameter controlling the VPD limitation of GPP

FP_qc

quality flag: 0: good parameter fit, 1: some parameters out of range, required refit, 2: next parameter estimate is more than two weeks away

FP_dRecPar

records until or after closest record that has a parameter estimate associated Light response curve parameters FP_X are estimated for windows, and are reported with the first record of the window

Author(s)

MM, TW (Department for Biogeochemical Integration at MPI-BGC, Jena, Germany)

References

Lasslop G, Reichstein M, Papale D, et al. (2010) Separation of net ecosystem exchange into assimilation and respiration using a light response curve approach: critical issues and global evaluation. Global Change Biology, Volume 16, Issue 1, Pages 187-208

See Also

partGLFitLRCWindows

partGLInterpolateFluxes


REddyProc documentation built on May 31, 2017, 3:09 a.m.