Enhancing the Barcelona Supercomputing Centre chemical transport model with aerosol assimilation
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1 Enhancing the Barcelona Supercomputing Centre chemical transport model with aerosol assimilation Enza Di Tomaso 1, Nick Schutgens 2, Oriol Jorba 1, George Markomanolis 1 1 Earth Sciences Department, Barcelona Supercomputing Centre 2 Atmospheric, Oceanic and Planetary Physics, University of Oxford WWOSC 2014, Montreal, August 20, 2014
2 The Barcelona Dust Forecast Center: a WMO initiative
3 Our Dust Model NMMB/BSC-CTM NMMB BSC-CTM DUST Pérez et al., ACP, 2011 CHEM Jorba et al., JGR, 2012 SEA-SALT Spada et al, ACP, 2013
4 Our Dust Model NMMB/BSC-CTM NMMB BSC-CTM DUST Pérez et al., ACP, 2011 CHEM Jorba et al., JGR, 2012 SEA-SALT Spada et al, ACP, 2013
5 Our Dust Model NMMB/BSC-CTM NMMB BSC-CTM DUST Pérez et al., ACP, 2011 CHEM Jorba et al., JGR, 2012 SEA-SALT Spada et al, ACP, 2013
6 Our Dust Model NMMB/BSC-CTM NMMB BSC-CTM DUST Pérez et al., ACP, 2011 CHEM Jorba et al., JGR, 2012 SEA-SALT Spada et al, ACP, 2013
7 Current Operational Flow 00 IC +06 FC +12 FC +18 FC +24 FC model day 1 day 2 day 3 time 00 IC FC model
8 Data Assimilation Flow 00 IC +06 FC +12 FC +18 FC +24 FC model day 1 day 2 day 3 time 06 obs 12 obs 18 obs 24 obs 00 IC FC model
9 Data Assimilation Flow 00 IC +06 FC +12 FC +18 FC +24 FC model day 1 day 2 day 3 time 06 obs 12 obs 18 obs 24 obs model 1 model m model M 00 IC FC model
10 Data Assimilation Flow 00 IC +06 FC +12 FC +18 FC +24 FC model day 1 day 2 day 3 time 06 obs 12 obs 18 obs 24 obs model 1 model 1 model m DA model m DA DA model M model M 00 IC FC model
11 Data Assimilation Flow 00 IC +06 FC +12 FC +18 FC +24 FC model day 1 day 2 day 3 time 06 obs 12 obs 18 obs 24 obs model 1 model 1 model m DA model m DA DA model M model M 06 AN 12 AN 18 AN 24 AN 00 IC FC model
12 Local Ensemble Transform Kalman Filter { x (m) = x b + X b w m m = 1,, M} FUNCTION ApplyLETKF, Y b nobs, M, S ε, y H x b,, W M, M (function and figure by Takemasa Miyoshi, Ott et al. 2004, Hunt et al. 2005)
13 Dust Journey in the Model
14 Dust Journey in the Model
15 Emission Scheme (credits C. Perez)
16 Perturbations factor Vertical mass flux of dust into a transport bin k F k = C S 1 V α H 3 i=0 m i M i,k k = 1,, 8
17 Perturbations factor Vertical mass flux of dust into a transport bin k F k = C S 1 V α H 3 i=0 m i M i,k k = 1,, 8
18 Emission Scheme source function (C. Perez et al. 2011)
19 Observations
20 Observation uncertainty
21 Experiment setup Experiment Assimilated Observations Perturbations CTL none NA Exp1 NRL MODIS 1 calibration factor Exp2 selected NRL MODIS 1 calibration factor Exp3 NRL MODIS calibration factors per bin Exp4 NRL MODIS calibration factors per fine/coarse bin
22 Experiment setup Experiment Assimilated Observations Perturbations CTL none NA vs Exp1 NRL MODIS 1 calibration factor Exp2 selected NRL MODIS 1 calibration factor Exp3 NRL MODIS calibration factors per bin Exp4 NRL MODIS calibration factors per fine/coarse bin
23 Control experiment
24 DA experiment
25 DA experiment
26 DA experiment
27 Validation
28 Validation
29 Validation
30 Control experiment
31 DA experiment
32 DA experiment
33 Validation
34 Control experiment
35 DA experiment
36 DA experiment
37 Validation
38 Ensemble analysis - background
39 Ensemble analysis - background
40 Ensemble analysis - background
41 First-guess departures
42 First-guess departures
43 First-guess departures
44 First-guess departures
45 Experiment setup Experiment Assimilated Observations Perturbations CTL none NA Exp1 NRL MODIS 1 calibration factor vs Exp2 selected NRL MODIS 1 calibration factor Exp3 NRL MODIS calibration factors per bin Exp4 NRL MODIS calibration factors per fine/coarse bin
46 Observations
47 Selected observations
48 Validation
49 Experiment setup Experiment Assimilated Observations Perturbations CTL none NA Exp1 NRL MODIS 1 calibration factor Exp2 selected NRL MODIS 1 calibration factor vs Exp3 NRL MODIS calibration factors per bin Exp4 NRL MODIS calibration factors per fine/coarse bin
50 Validation
51 Validation
52 Validation
53 Experiment setup Experiment Assimilated Observations Perturbations CTL none NA Exp1 NRL MODIS 1 calibration factor Exp2 selected NRL MODIS 1 calibration factor Exp3 NRL MODIS vs calibration factors per bin Exp4 NRL MODIS calibration factors per fine/coarse bin
54 Validation
55 Validation
56 Porting the DA code to OmpSs programming model Serial execution with various tasks (different colors, Paraver view) The usage of OmpSs on the calcensstat subroutine (green color) By using two cores we improve two times the performance of the subroutine and we gain 17% of the total execution time
57 International Model Intercomparison: the Global Domain = data assimilation
58 International Model Intercomparison: the Global Domain = data assimilation
59 International Model Intercomparison: the Regional Domain Dust optical depth: Apr FC+24 = data assimilation
60 International Model Intercomparison: the Regional Domain Dust optical depth: Apr FC+24 = data assimilation
61 Conclusions Data assimilation with the LETKF scheme can help us to better forecast atmospheric dust
62 Conclusions A correct characterisation of the ensemble perturbations has a great potential to deal with our model uncertainties
63 Conclusions Once we will have the complete aerosol family in the BSC chemical transport model, the assimilation of satellite aerosol products will be more meaningful
64 Acknowledgments Thanks to: All the Principal Investigators and their staff for establishing and maintaining the AERONET sites used in this investigation ( NRL-UND for the MODIS AOD and FF L3 product (Zhang et al. 2006, 2008, Shi et al. 2011, Hyer et al. 2011) ( The MODIS mission scientists and associated NASA personnel for the production of the AOD and AE data used in this investigation ( Takemasa Miyoshi (RIKEN Institute, Japan) who developed the core of the LETKF scheme (Ott et al. 2004, Hunt et al. 2005)
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