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Dry Deposition in TM5 F.Dentener, M.Krol, L.Ganzeveld, G. Verver, A. Segers M.v. Weele

Dry Deposition in TM5 F.Dentener, M.Krol, L.Ganzeveld, G. Verver, A. Segers M.v. Weele. Calculate on 1x1 degree, then coarsen to required resolution Use as much as possible consistent ECMWF fields Reduce the amount of pre-processing Simplified a number of calculations. Main subroutines :

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Dry Deposition in TM5 F.Dentener, M.Krol, L.Ganzeveld, G. Verver, A. Segers M.v. Weele

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  1. Dry Deposition in TM5 F.Dentener, M.Krol, L.Ganzeveld, G. Verver, A. Segers M.v. Weele • Calculate on 1x1 degree, then coarsen to required resolution • Use as much as possible consistent ECMWF fields • Reduce the amount of pre-processing • Simplified a number of calculations. TM5 meeting, De Bilt, 10.06.2003

  2. TM5 meeting, De Bilt, 10.06.2003

  3. Main subroutines: dd_get_3_hourly_surface_fields dd_calc_ustar_raero_rb dd_calc_rstom_rahcan dd_calc_inisurf dd_calc_rs dd_coarsen_vd TM5 meeting, De Bilt, 10.06.2003

  4. External fields required: lsmlai.hdf (from Olson) soilph.hdf () • ECMWF fields, • either 3 hourly or daily average • every daily file contains all fields: easy restart. • Not every field in surface file is actually used by dry_deposition. Constant fields: lsm (land-sea mask) tv, cvl, cvh vegetation characteristics (at moment annual average) TM5 meeting, De Bilt, 10.06.2003

  5. Daily fields: sr_ecm surface roughness ci sea ice sd snow depth swvl1 soil water volume 3 hourly fields t2m 2 m temperature d2m 2 m dew point temperature u10,v10 10 m u and v component of wind speed surfstress surface stresss src skin reservoir content ssr solar radiation sshf surface sensible heat flux slhf surface latent heat flux TM5 meeting, De Bilt, 10.06.2003

  6. subroutine dd_calc_ustar_raero_rb • Method • ! ------ • ! uses the log normal wind profile information stored by • ! ECMWF in 10 meter wind • ! to estimate a local ustar over land • ! uses Charnock equation over sea to estimate ustar • ! aerodynamic resistance is calculated from heat fluxes and • ! ustar using a constant reference height • ! sub laminar resistance from ustar • MUCH SIMPLER THAN PREVIOUS METHOD WHERE USTAR AND RAERO WERE CALCULATED ITERATIVELY TM5 meeting, De Bilt, 10.06.2003

  7. subroutine dd_calc_rstom_rahcan • ! ----------------------------- • ! Purpose • !--------- • ! Calculate water vapour stomatal resistance from the PAR • ! (Photosythetically Active Radiation) which is 0.55 times • ! the net short wave radiation (ssr) at the surface. • ! Calculate rahcan from ustar and lai • USE OF SSR IS IMPROVEMENT COMPARED TO TM3 • WHICH USED MONTHLY AVERAGED FIELDS AND A SCALING FACTOR TM5 meeting, De Bilt, 10.06.2003

  8. subroutine dd_calc_inisurf • ! ------------------------ • ! Purpose • !--------- • ! Calculate some surface fields later needed in the calculation • CLOSE TO TMSCIA VERSION MVW, USES ALMOST ENTIRELY ECMWF FIELDS TM5 meeting, De Bilt, 10.06.2003

  9. Consistency of data …. forest TM5 meeting, De Bilt, 10.06.2003

  10. Raero on-line calculated monthly average Raero preprocessing calculated monthly average TM5 meeting, De Bilt, 10.06.2003

  11. Ustar calculated on line January and July Ustar preprocessing January and July TM5 meeting, De Bilt, 10.06.2003

  12. vdHNO3 TM5 January and July, TM3 July TM5 meeting, De Bilt, 10.06.2003

  13. vdO3 TM5 meeting, De Bilt, 10.06.2003

  14. vdSO2 TM5 meeting, De Bilt, 10.06.2003

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