BARCA CH 4 data analysis

BARCA Telecon 04-12-2009 MPI for Biogeochemistry Jena

BARCA CH4 data analysis

Flight 3 (17/06/2009) during BARCA Phase B in the wet season covering wetland area of Rio Negro and Rio Solimões


BARCA CH4 data analysis

Phase A: only CH4 flask measurements are available; selected flasks have been sent to Utrecht (Thomas Röckmann) for an isotope analysis

Phase B : insitu and flask measurements – flasks are currently being analyzed and selected flasks might also be sent to Utrecht then for an isotope analysis

Comparison of CH4 data to global model output (TM5, TM3, etc.)

Comparison to regional model output (WRF-chem+VPRM-CH4, STILT)


Weather Research and Forecast Model

Transport of CO2, CH4 and CO

Stochastic Time Inverted Lagrangian Transport Model

Determination of CH4 sources and sinks

WRF-chem STILTWRF metfields

ECMWF Data

Modeling plans for BARCA Phase A and B

Running WRF with a new module greenhouse gases (chem_opt=98, includes VPRM, wetland-model,plumerise,etc.)for BARCA Phase A and Phase B for CH4, CO2 and CO

STILT runs for CH4 driven by either WRF meteorological fields or ECMWF data


WRF Validation

Participation in evaluation and testing of the WRF set-up for the Amazon region (mostly done at INPE)

1. Precipitation/Convection Evaluation of WRF precipitation output against TRMM and GPCP data

2. Radiation Aeronet data available for 2002 (six stations) and 2008/2009 (only Alta

Floresta and Rio Branco) Validation of WRF Amazon setup (lw 1 & sw 2 options) against Aeronet data

for BARCA Phase A and Phase B also interesting for use of VPRM

Solar radiation Rio Branco May 2009


WRF runsTagged tracer WRF runs for BARCA Phase A and Phase B for CH4, CO2 and CO to scale different sources in comparison with the observatios

Subroutines for VPRM, wetland model (Kaplan wetland inventory) and termites are combined under the new module_greenhouse_gases (chem_opt=98) which also uses the plumrise mechanism VPRM parameters & preprocessing

Until global fields of CH4, CO2 and CO are available for 2008 and 2009, 5°x5° fields interpolated from NOAA surface stations are used for initial and boundary conditionsCould somebody already provide the NOAA surface station data for May 2009?

The WRF biomass burning preprocessor wrf_chem_prep_source was installed in Jena and biomass burning emissions estimates (including the Modis satellite data) can now be provided on WRF and Lat/Lon grid also in netcdf outputWe would still need the satellite data for May 2009 (WF_ABBA & DSA)

EDGAR 4 data are used for anthropogenic sources – CO data?Importance of vegetation CH4 source and soil uptake CH4 still has to be discussed


WRF CH4 flux mapsTermiteWetland 1Wetland 2

CH4 wetland fluxes 1 CH4 wetland fluxes 2


STILT runs for BARCA

STILT to provide consistent footprint information -> Source region identification

Fast forward tagged tracer runs for receptors along flight path -> hypothesis testing for different fluxes

Inverse analysis (nested inversion)-> optimal source configuration


STILT runs for BARCA Status

Domain set up (-35 -85 Lat Lon south-west, 15 -30 Lat Lon north-east)should be identical to VY domain!

STILT-ECMWF: ECMWF preprocessing for Phase A and B running

STILT-WRF: waiting for WRF fields

Coupling to fluxes:

Biomass burning fields (C. Wiedenmyer (UCAR)) available as ncdf

EDGAR V4 and others used in WRF-chem need preprocessing to cartesian grid

VPRM parameters and fields -> VY domain?



Comparison CO Biomass burning emissions








O2/N2 from BARCA flasks

BARCA A: 145 flasks sucessfully anaylzed for O2/N2

ArN2 values used for correction of fractionation: O2/N2(corr) = O2/N2 – (ArN2-mean(ArN2))


O2/N2 from BARCA flasks - plans

Use STILT to separate contributions to O2/CO2 ratio from different processes

• Respiration /Photosynthesis VPRM fields von VY• Biomass burning (similar signature) C. Wiedenmyer • Fossil fuel Julia’s COFFEE dataset for different fossil fuel types, 1x1 degree

Documents

BARCA CH 4 data analysis