PreliminaryEvaluation of a one year reanalysis (2006)

of dust simulation with AeroCom tools

Michael SchulzSara Basart, Jose Baldasano,Jean Jacques Morcrette, Angela BenedettiNicolas Huneeus, Anne Cozic, Jan GriesfellerCarlos Perez

Norwegian Meteorological Institute, Oslo, NorwayBSC, ECMWF, Columbia University, LSCE

Methodology• Gathering of one year model data in netcdf format, daily

on AeroCom server– BSC-DREAM8b– ECMWF-F026 (assimilating MODISaqua/terra) plus other versions– INCA-forecast plus other versions– NMMB-BSC

• Analysing daily fields of AOD, coarse mode AOD,emission, wet removal, load, surface concentration of dust

• Comparing to Aeronet data level 2, sun and sky mode– ( Total AOD@550 )– Coarse mode AOD@550

Image results accessible via WMO-SDS model subsethttp://aerocom.met.no/cgi-bin/aerocom/surfobs_annualrs.pl?MODELLIST=WMO-

SDS

Location of sites for North Africa evaluationwhere comparison is performed

Coarse mode aerosol optical thicknessBS

C-D

REAM

ECM

WF

INCA

NM

MB-

2000

April-June 2006, Coarse mode AODTransport from Sahel out to Atlantic

BSC-DREAM AERONET ECMWFassim AERONET

AgoufouSahel

CapoVerdewest

April-June 2006, Coarse mode AODTransport across the Mediterranean

BSC-DREAM AERONET ECMWFassim AERONET

ForthCrete

Toulon

Evaluation against coarse mode AOD from Aeronet over Northern Africa 2006

BSC-

DRE

AM

ECM

WF

INCA

NM

MB-

2000

Dust Load and dust AOD

MEC 0.65 m2 g-1 MEC 0.58 m2 g-1

BSC-

DRE

AM

ECM

WF

Proposition for joint studyto explore usage of coarse AOD for evaluation

Complete and check diagnostics, newer model versions? Retrieve size from all tracer 3D field…

Correct budget analysis and analyse dust life time Use non-assimilated ECMWF model version

for comparison of impact of assimilation Explore the contribution of other components to coarse AOD,

remove cases which are not dust dominated

Investigate on annual basis: which cases are well captured, which pose problems

Add more models ?? Other years ??