AODEM - Aerosol Optcal DEpth Module: an aerosol optical scheme for chemical-transport models

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1 AODEM - Aerosol Optcal DEpth Module: an aerosol optical scheme for chemical-transport models Tony Christian LANDI Participants G. Curci, F. Angelini, G. P. Gobbi, L. Caporaso, W. Di Nicolantonio, A. Cacciari, E. Bolzacchini and A. Riccio

2 Outline Motivations and goals Motivations Goals AODEM : software description and results Description Results - Model assessment Summary

3 Motivations Exploiting the observations of AOP for CTM assessment

4 Motivations Exploiting the observations of AOP for CTM assessment

5 Motivations How to distribute the AOD along a vertical profile?

6 Motivations Exploiting the observations of AOP for CTM assessment

7 Goals AODEM has been developed!

8 Description What is AODEM?

9 Description How does it work?

10 Description Which format does it create?

11 Description How does it work?

12 Results - Model assessment Chimere and AODEM products Parameter Model 1. mass concentration [µg/m 3 ] Chimere2008c 2. particles number [#/m 3 ] AODEMv Mie calculation Bohren and Huffman (1983) AODEMv signa ext [km 1 ] layer by layer AODEMv Aerosol Optical Depth AODEMv1.0

13 Motivations and goals AODEM : software description and results Summary Results - Model assessment 1/5 CHIMERE domains

14 Results - Model assessment 1/5 CHIMERE performances : coarse domain (50x50km 2 ) Underestimation of about 40%, both in winter and summer and both PM10 and PM2.5 fractions. Extreme values are not captured by the model (Stern et al., 2008).

15 Results - Model assessment 1/5 CHIMERE performances : nested domain (10x10km 2 )

16 Results - Model assessment 2/5 Obs from tethered balloon vs predictions [#/m 3 ]

17 Results - Model assessment 2/5 Obs from tethered balloon vs predictions [#/m 3 ]

18 Results - Model assessment 3/5 Mie calculation : BHmie vs BHmie

19 Results - Model assessment 3/5 Mie calculation : BHmie vs Mishchenko

20 Results - Model assessment 4/5 AODEM/Sigma ext. : qualitative comparison vs Lidar (RCS)

21 Results - Model assessment 4/5 AODEM/Sigma ext. : qualitative comparison vs Lidar (RCS)

22 Results - Model assessment 5/5 AODEM/AOD : quantitative comparison vs AERONET data

23 Results - Model assessment 5/5 AODEM/AOD : quantitative comparison vs AERONET data

24 Results - Model assessment 5/5 AODEM/AOD : quantitative comparison vs AERONET data

25 Results - Model assessment 5/5 AODEM/AOD : quantitative comparison vs MODIS data

26 Results - Model assessment 5/5 AODEM/AOD : quantitative comparison vs AERONET & MODIS data

27 Start-up:

28 Yet another never-ending story!?

29 Outlook : 1/3 optical properties calculation for non-spherical particles

30 Outlook : 2/3 WRF/Chimere instead of MM5/Chimere winter (DJF) summer (JJA)

31 Outlook : 2/3 WRF/Chimere instead of MM5/Chimere winter (DJF) summer (JJA)

32 Outlook : 2/3 WRF/Chimere/AODEM instead of MM5/Chimere/AODEM winter (DJF) summer (JJA)

33 Outlook : 3/3 Developing a parellal code for AODEM Establishing a collaboration with a student in computer science? Interest in further details about AODEMv1.0? Free download of the source code is available!

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