1 / 25

MOCAGE last results for AMMA

MOCAGE last results for AMMA Béatrice Josse,Météo-France CNRM/GMGEC/CARMA Paris Workshop, Sept 16-17 2008 Plan I Configuration and experiments II A global / integrated overview III What happens on Africa On the ground In the lower troposphere On the whole vertical

Jimmy
Download Presentation

MOCAGE last results for AMMA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MOCAGE last results for AMMA Béatrice Josse,Météo-France CNRM/GMGEC/CARMA Paris Workshop, Sept 16-17 2008

  2. Plan • I Configuration and experiments • II A global / integrated overview • III What happens on Africa • On the ground • In the lower troposphere • On the whole vertical • IV Partial conclusions, future plans and questions

  3. MOCAGE 47 hybrid levels I Config. and Exp. MOCAGE configuration for AMMA GLOBE 2°x2° AMMA 0.5°x0.5° Chemscheme : RACMOBUS(strato-tropo) Subgrid parameterization : - convection (Bechtold, 2001) • scavenging (Mari et al, 2000 + Liu et al, 2001) • dry deposition (Wesely, 1989) • eddy diffusion (Louis, 1979) • Resolved-scale transport : • Semi-lagrangian (Williamson et Rasch,1989)

  4. Boreal latitude : Lmax = 6000m Mid-latitude : Lmax = 4000m Tropical latitudes : Lmax = 1000m I Config. and Exp. MOCAGE configuration for AMMA Injection of Biomass Burning Fires: • From Lmax to the ground INJ(L+1) = 0.5 INJ(L) • From Lmax+1to Lmax+2 INJ(L–1) = 0.3 INJ(L)

  5. I Config. and Exp. Experiments Hybrid : LA emissions on Africa, RETRO-2000 + GFED elsewhere

  6. I Config. and Exp. Emissions • Emissions of CO and NOx for Experiment B :

  7. II Global and integrated overview. Global overview Ozone total columns MOCAGE Observations January April

  8. II Global and integrated overview. Global overviewOzone total columns MOCAGE Observations August October The model runs stable throughout 2006

  9. II Global and integrated overview. Global overview Ozone tropospheric columns MOCAGE TES Obs Jan Apr

  10. II Global and integrated overview. Global overview Ozone tropospheric columns MOCAGE TES Obs Aug Oct

  11. II Global and integrated overview. African Focus • Low troposphere CO (~850hPa) MOPITT MOCAGE MOPITT MOCAGE August January • Intensity and position of biomass fires well represented • Atlantic export well seen, too high in August • Underestimation of concentrations above Sahara, Persian Gulf and southern Europe.

  12. II Global and integrated overview. African Focus • Low troposphere NOx : August 2006 MOCAGE 850 hPa MOCAGE surface Schiamachy trop. column Vertical distribution (and hence injections) is crucial

  13. IIIAfrica : at the ground Ozone and NOx annual cyclesat Nangatchori • Ozone and NOx annual cycles well seen • Evidence of a lack in NOx ground emissions • Waiting for other IDAF sites observations.

  14. IIIAfrica : on the vertical surface 850 hPa 600 hPa AMMA campaignCotonou August Ozone Radio-Soundings Ozone at different levels in August 2006 Cotonou

  15. IIIAfrica : on the vertical • Some patterns very well reproduced, some other missed • Too much ozone at the surface • Chemical tropopause OK. AMMA campaignCotonou August Ozone Radio-Soundings

  16. IIIAfrica : on the vertical Amma flightsOzone data (M55 data missing) MOCAGE Observations

  17. IIIAfrica : on the vertical Is convection too efficient ? Amma flightsCO data (M55 data missing) MOCAGE Observations

  18. IIIAfrica : on the vertical A high temporal variability Monthly means for August 2006 Flight zone The flight zone is at the limit of the mean gradients

  19. IIIAfrica : on the vertical A high temporal variability • Emissions are the same throughout the month

  20. IV Conclusions and plans Conclusions • Correct behaviour of MOCAGE, in a global point of view, for CO and Ozone. • NOx still have to be investigated. First results seem to point out a relatively good agreement, but ground emissions are lacking. LiNOx to be systematically included. • Very high temporal variability in the model, despite constant emissions during a month. Sometimes patterns are captured, sometimes not : Emissions or meteorology?

  21. IV Conclusions and plans Plans, questions and remarks… • Other species have to be looked at : for instance, HCHO seems right, OH seems to be high compared to other models. PAN, HNO3 and H2O2 not yet analysed. • Tracer experiments have to be carefully used to explain models behaviour • New observations will be (hopefully) soon available, like depositions. • New experiments will be made (D, with higher frequency emissions)

  22. IV Conclusions and plans Plans, questions and remarks… • Analysis of data from flights has to be more carefull than just a 1-plot : Example of 2 ozone profiles from ATR : over or under-estimation?

  23. IV Conclusions and plans Plans, questions and remarks… • New experiment (D) + baseline runs + sensitivity to meteorology = lots of experiments ! In the frame of the intercomparison, we need to find performant tests, the amount of data to is at the moment too high • The question of emissions is still important : what about biogenics?

  24. Biogenic emissions (Tg C or N) E040S59M00IP CO 43.18523 E013S59M90IP HC3 174.6670 E014S59M90IP HC5 49.82963 E015S59M90IP HC8 9.863806 E016S59M90IP ETE 4.931903 E023S59M90IP KET 19.98766 E005S71M00IP NOx 4.999860 E025S90M90GE ISO 503 E026S00M90IP API 127 E027S00M90IP LIM 260

More Related