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Dust modelling Earth Science BSC activites. BSC - DREAM8b 72h daily forecast - http://www.bsc.es/projects/earthscience/DREAM BSC - DREAM8b evaluation activities - DREAM improvement (Pérez et al., 2006a; Pérez et al., 2006b) - BoDEx model intercomparison (Todd et al., 2008)

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dust modelling earth science bsc activites
Dust modelling Earth Science BSC activites

BSC-DREAM8b 72h daily forecast

- http://www.bsc.es/projects/earthscience/DREAM

BSC-DREAM8b evaluation activities

- DREAM improvement (Pérez et al., 2006a; Pérez et al., 2006b)

- BoDEx model intercomparison (Todd et al., 2008)

- DREAM8b vs. SAMUM-I (Haustein et al., 2009; GRL)

- DREAM8b vs. AERONET 2004 (Basart et al., 2011)

NMMB NWP model development and evaluation

- NMMB/BSC-DUST (Perez et al., 2011; Haustein et al., 2011)

- NMMB/BSC-CHEM (Poster Jorba et al., 2011)

- NMMB/BSC-DUST with aerosols (AERO)

Earth Sciences Department, Barcelona Supercomputing Center (BSC-CNS), Barcelona, Spain

Environmental Modeling Laboratory, Technical University of Catalonia (UPC), Barcelona, Spain

ncep nmmb
NCEP-NMMB
  • Non-hydrostatic Multiscale Model at the Arakawa B grid
  • Still under development at NCEP (Janjic, 2005; Janjic and Black, 2007)
  • Follows the general modeling philosophy of the WRF-NMM (Janjic, 2001; 2003)
  • Hence the evolution of ETA model with updated meteorological core
  • Built on NWP experience by relaxing hydrostatic approximation
  • Unified model for a broad range of spatial and temporal scales
  • Developed within the Earth System Modeling Framework (ESMF)
  • Arakawa B grid and regular (global) or rotated (regional) lat/lon coordinate
  • Lorenz vertical staggering and Pressure-sigma hybrid coordinate
  • Adams-Bashforth/Crank-Nicholson for horizontal/vertical advection
  • The non-hydrostatic option as an add-on module
  • NMMB regional will become the next-generation NCEP mesoscale model for

operational weather forecasting in 2011 replacing NAM (WRF-NMME) model

slide3

Structure of NMMb using Earth System Modeling Framework (ESMF)

ATM

Coupler DYN-PHYS

Dynamics export

T, U, V, Q, CW, Q2, OMGALF

RUN DYNAMICS

RUN PHYSICS

Coupler DYN-PHYS

Physics Export

T, U, V, Q, CW, Q2

slide4

NMMb/BSC-DUST-CHEM using Earth System Modeling Framework (ESMF)

ATM

Coupler DYN-PHYS

Dynamics export

T, U, V, Q, CW, Q2, OMGALF,

DUST, CHEM

RUN PHYS

(Dust

Emission, vdiff, deposition,

chem emission, vdiff,

photolysis,

chemical mechanism,

deposition)

RUN DYN

(DUST, CHEM

hadv,vadv and hdiff)

Coupler DYN-PHYS

Physics Export

T, U, V, Q, CW, Q2,

DUST, CHEM

DUST and gas-phase CHEM modules fully embeded within the atmospheric driver

nmmb bsc dust
NMMB/BSC-DUST

NMMB/BSC-DUST is embedded into the NMMB model and solves the mass balance equation for dust taking into account the following processes similar to the design of BSC-DREAM8b

 dust generation/emission by surface wind

horizontal and vertical advection

 vertical transport/diffusion by turbulence and convection

dry deposition and gravitational settling

- sedimentation, gravitational settling (Stokes-Cunningham approx.) and surface layer parameterization

wet removal including in-cloud and below-cloud scavenging

- dust scavenging is computed separately for convective and grid-scale precipitation

- Ferrier grid-scale microphysics and BMJ convective adjustment scheme

- Below cloud scavenging in each layer (Slinn, 1984; Loosmoore and Cederwall, 2004)

 RRTM SW/LW dust radiative feedback

model results
MODEL RESULTS

Regional test case

 Regional North African domain at 0.25x0.25º spatial resolution

 40 vertical layers and fundamental time step of 40 seconds

 1x1º NCEP analysis meteorology data reinitialized every 24 hours

 updated of boundary conditions every 6 hours

 Non-hydrostatic physics and dust cold start period of 3 days

 SAMUM-I period May 2006

 BoDEx period March 2005

 Dust storm in March 2004

BSC - Mare Nostrum

results samum i
RESULTS: SAMUM-I

SAMUM-I on 18 May 2006

a

b

c

d

f

e

results samum i1
RESULTS: SAMUM-I

Stations

a

b

d

e

g

h

c

f

a

c

d

b

SAMUM-I

red - AERONET

blue - Bodélé

green - EARLINET

 Naples

 Athens

 Thessaloniki

e

f

g

h

Day of May 2006

Day of May 2006

results samum i2
RESULTS: SAMUM-I

SAMUM-I

SAMUM-I

a

b

d

c

e

g

j

f

h

k

results samum i3
RESULTS: SAMUM-I

SAMUM-I

SAMUM-I

a

b

d

c

e

d

j

e

k

j

k

results bodex
RESULTS: BoDEx

PIBAL sonde wind speed at Chicha

Stations

NCEP (FNL) 1 x 1 analysis

Bodélé

NMMB/BSC-DUST (NCEP-FNL)

01 02 03 04 05 06 07 08 09 10 11

Day of March 2005

results bodex1
RESULTS: BoDEx

Sunphotometer Chicha

results dust event
RESULTS: Dust Event

Perfect dust storm on 3 March 2004

a

b

d

LDA MSG/SEVIRI product

c

f

e

For more information on LDA MSG/SEVIRI product → Govaerts et al., 2010

results dust event1
RESULTS: Dust Event

Perfect dust storm on 3 March 2004

a

b

d

LDA MSG/SEVIRI product

c

f

e

For more information on LDA MSG/SEVIRI product → Govaerts et al., 2010

conclusion
Conclusion

NMMB/BSC-DUST versus SAMUM-I

- Good qualitative reproduction of the dust cycle but moderate differences

- Very good temporal agreement between model and AERONET AOD

- Acceptable agreement in the profiles between model and EARLINET lidars

- Model wind is fairly well simulated from NMMB (no radiative feedback here)

NMMB/BSC-DUST versus BoDEx

- The Bodélé low level jet (LLJ) can be nicely identified in the model

- Peak wind speeds are underestimated nonetheless over the Bodélé

- Diurnal 2m temperature depends heavily on initial soil moisture data

- Soil moisture feeds also back model wind, hence simulated dust uptake

global annual
GLOBAL ANNUAL

Rosenstiel School Miami Network sites

NMMB/BSC-DUST

Total surface concentration observations

NMMB/BSC-DUST

global annual1
GLOBAL ANNUAL

AERONET sites

NMMB/BSC-DUST

NMMB/BSC-DUST

Total AOD observations

slide19

NMMb/BSC-Dust 2006 global simulation

Simulation:

  • Global simulation for year 2006
  • 0.7º x 0.5º x 40 vertical levels
  • Cold start without data assimilation
  • Initial conditions from NCEP analysis 1x1º. Meteorological fields updated with NCEP every 24 hours.

Aeronetvalidation:

  • Aeronet data hereisCoarse AOD (mainlydustoverdustaffectedstations)
  • Wevalidatedailyaverages
thank you for your attention

C. Pérez

O. Jorba

S. Basart

K. Haustein

K. Serradell

  • Martínez
  • J.M. Baldasano
THANK YOU FORYOUR ATTENTION

Acknowledgements

Thisworkisfundedbytheprojects CGL2006-11879, CGL2008-02818,

CGL2010-19652 of theSpanishMinistry of Science and Innovation.

Simulationshavebeenperformed in theMarenostrumsupercomputer.

Wethankthe AERONET and EARLINET communityfortheir

valuable data as well as the SAMUM-I and BoDExpeoplefor

providingtheircomprehensive data.