PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group Simultaneous use of greenhouse gas concentration measurements and meteorological measurements.

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Presentation transcript:

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group Simultaneous use of greenhouse gas concentration measurements and meteorological measurements in a mesoscale model to improve regional scale budget estimates Plan for PhD thesis by Roberto Kretschmer

PBL FTS optimization of WRF-VPRM runs Institute Retreat June 16-19, 2008 – Chorus ATM-Group VPRM Vegetation Photosynthesis and Respiration Model 10x10 km 2 Fossil fuel Emissions IER 10x10 km 2 High resolution Tracers ECMWF meteorology lateral+initial met. boundary conditions combine and automatize all steps Model Organizing Software System (MOSS)

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group system access via web interfaces

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group improve regional scale budget estimates Plan for PhD thesis… Photo courtesy of Beverly Shannon Wallace and Hobbs, 2006, Fig. 9.1

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group uncertain transport means uncertain mixing ratios (Gerbig et al., 2008) ~3.5 ppm error in PBL CO 2 mixing ratio estimates from ECMWF driven transport model in summertime

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group improve estimates by using additional meteorological information 20 June 18 June CERES Experiment, provided by Pierre Durand, Lab. d’Aérologie exploit ceilometer network of Deutscher Wetterdienst maintaining about 100 stations but: ceilometer PBL sight might be insufficient

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group relevant data sources satellite observations CALIPSO (Liu et al., 2008) tall tower measurements MeteosatICESAT (icesat.gsfc.nasa.gov) radio soundings retrieval of remote sensing data: advertisement for PhD student within Dietrich Feist’s group

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group approach 1.forward modelling using WRF-VPRM for CO 2 and CH 4 validation of WRF mixing heights against observations reshuffling of tracers between PBL and FT to match observed mixing heights –Hypothesis: this leads to better agreement between simulated and measured tracers

PBL FTS integrate STILT into MOSS Institute Retreat June 16-19, 2008 – Chorus ATM-Group STILT

PBL FTS Institute Retreat June 16-19, 2008 – Chorus ATM-Group approach 1.forward modelling using WRF-VPRM for CO 2 and CH 4 validation of WRF mixing heights against observations reshuffling of tracers between PBL and FT to match observed mixing heights –Hypothesis: this leads to better agreement between simulated and measured tracers 2.nudging of variables in WRF to match observed mixing heights inverse modelling with STILT to derive improved estimates of regional scale CO 2 and CH 4 fluxes and their uncertainties comparison with independent flux estimates