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V. Obiso et al.
global domain with the NMMB-MONARCH [6, 12, 14, 15]. Simulated single scattering albedo (ω) and asymmetry factor (g) at 0.550 μm have been compared with
AERONET Version 2.0 inversion data. The impact on these intensive properties of
new aerosol refractive indexes, selected from recent literature, has also been evaluated. To the best knowledge of the authors, this kind of perturbed analysis represents
a novelty in the context of the few evaluations of model intensive optical properties
available in literature.
66.2 Observations
Observations taken from AERONET (Version 2.0) [4] have been used for our evaluation. It is well known [8] that there is a lack of Level 2 inversion data, mainly due to
the optical depth (τ ) filtering. Hence, we performed a manual screening of the Level
1.5 data by applying all the Level 2 quality-assurance criteria except filtering for
τ 440 > 0.4. By requiring then at least 20 daily means per month over the 2012–2016
period, we selected 59 stations (full set) which we used for a global evaluation of the
model performance (not shown here). A subset of 12 stations has been then selected
for a more detailed analysis (including also the perturbed analysis), by applying the
three following criteria: (i) monthly medians of observed τ above the threshold of
0.1 for more than 6 months (accuracy of inversion data); (ii) same number of stations
dominated by natural and anthropogenic aerosols; (iii) homogeneous geographical
distribution of the stations.
66.3 Model Simulations
The NMMB-MONARCH has been configured to run global meteorology-aerosol
simulations over the period 2012–2016 (5-years period with 1 year of spinup) with
initializing the meteorological fields every 24 h by means of NCEP FNL
1 analyses.
The horizontal resolution for the global domain has been set to lon × lat = 1.4º ×
1.0º and 48 vertical layers have been considered.
Emissions of organic carbon, black carbon and SO 2 from HTAP_v2.2
2 (anthropogenic), GFASv1.2
3 (biomass burning, including also dimethylsulfide: DMS) and
from [16] (global open burning of domestic waste) have been used; also DMS
ocean production fluxes from MOZART-4
4 simulations and online emission of
monoterpenes and isoprene, for secondary organic aerosol (SOA) formation, from
the MEGAN v2.04 model have been considered.
1 https://doi.org/10.5065/D6M043C6.
2 http://edgar.jrc.ec.europa.eu/htap_v2/.
3 http://gmes-atmosphere.eu/oper_info/global_nrt_data_access/gfas_ftp/.
4 http://cdp.ucar.edu.
V. Obiso et al.
global domain with the NMMB-MONARCH [6, 12, 14, 15]. Simulated single scattering albedo (ω) and asymmetry factor (g) at 0.550 μm have been compared with
AERONET Version 2.0 inversion data. The impact on these intensive properties of
new aerosol refractive indexes, selected from recent literature, has also been evaluated. To the best knowledge of the authors, this kind of perturbed analysis represents
a novelty in the context of the few evaluations of model intensive optical properties
available in literature.
66.2 Observations
Observations taken from AERONET (Version 2.0) [4] have been used for our evaluation. It is well known [8] that there is a lack of Level 2 inversion data, mainly due to
the optical depth (τ ) filtering. Hence, we performed a manual screening of the Level
1.5 data by applying all the Level 2 quality-assurance criteria except filtering for
τ 440 > 0.4. By requiring then at least 20 daily means per month over the 2012–2016
period, we selected 59 stations (full set) which we used for a global evaluation of the
model performance (not shown here). A subset of 12 stations has been then selected
for a more detailed analysis (including also the perturbed analysis), by applying the
three following criteria: (i) monthly medians of observed τ above the threshold of
0.1 for more than 6 months (accuracy of inversion data); (ii) same number of stations
dominated by natural and anthropogenic aerosols; (iii) homogeneous geographical
distribution of the stations.
66.3 Model Simulations
The NMMB-MONARCH has been configured to run global meteorology-aerosol
simulations over the period 2012–2016 (5-years period with 1 year of spinup) with
initializing the meteorological fields every 24 h by means of NCEP FNL
1 analyses.
The horizontal resolution for the global domain has been set to lon × lat = 1.4º ×
1.0º and 48 vertical layers have been considered.
Emissions of organic carbon, black carbon and SO 2 from HTAP_v2.2
2 (anthropogenic), GFASv1.2
3 (biomass burning, including also dimethylsulfide: DMS) and
from [16] (global open burning of domestic waste) have been used; also DMS
ocean production fluxes from MOZART-4
4 simulations and online emission of
monoterpenes and isoprene, for secondary organic aerosol (SOA) formation, from
the MEGAN v2.04 model have been considered.
1 https://doi.org/10.5065/D6M043C6.
2 http://edgar.jrc.ec.europa.eu/htap_v2/.
3 http://gmes-atmosphere.eu/oper_info/global_nrt_data_access/gfas_ftp/.
4 http://cdp.ucar.edu.