Mineral dust aerosol size distribution change during atmospheric transport

2003 ◽  
Vol 108 (D19) ◽  
Author(s):  
H. Maring
Keyword(s):  
Size Distribution ◽  
Mineral Dust ◽  
Atmospheric Transport ◽  
Dust Aerosol ◽  
Aerosol Size Distribution ◽  
Distribution Change

scholarly journals Dust plume formation in the free troposphere and aerosol size distribution during the Saharan Mineral Dust Experiment in North Africa

Tellus B ◽  
2015 ◽  
Vol 67 (1) ◽  
pp. 27170 ◽  
Author(s):  
Basit Khan ◽  
Georgiy Stenchikov ◽  
Bernadett Weinzierl ◽  
Stoitchko Kalenderski ◽  
Sergey Osipov
Keyword(s):  
Size Distribution ◽  
North Africa ◽  
Mineral Dust ◽  
Aerosol Size Distribution ◽  
Free Troposphere

scholarly journals Accounting for dust aerosol size distribution in radiative transfer

2015 ◽  
Vol 120 (13) ◽  
pp. 6537-6550 ◽  
Author(s):  
Jiangnan Li ◽  
Qilong Min ◽  
Yiran Peng ◽  
Zhian Sun ◽  
Jian-Qi Zhao
Keyword(s):  
Radiative Transfer ◽  
Size Distribution ◽  
Dust Aerosol ◽  
Aerosol Size Distribution

scholarly journals Ozone and aerosol tropospheric concentrations variability analyzed using the ADRIMED measurements and the WRF and CHIMERE models

2015 ◽  
Vol 15 (11) ◽  
pp. 6159-6182 ◽  
Author(s):  
L. Menut ◽  
S. Mailler ◽  
G. Siour ◽  
B. Bessagnet ◽  
S. Turquety ◽  
...  
Keyword(s):  
Size Distribution ◽  
Mineral Dust ◽  
Regional Climate ◽  
Mediterranean Area ◽  
Network Size ◽  
Ozone Production ◽  
Aerosol Size Distribution ◽  
Pollution Transport ◽  
Fine Mode ◽  
The Mediterranean

Abstract. During the months of June and July 2013, over the Euro–Mediterranean area, the ADRIMED (Aerosol Direct Radiative Impact on the regional climate in the MEDiterranean region) project was dedicated to characterize the ozone and aerosol concentrations in the troposphere. It is first shown that this period was not highly polluted compared to previous summers in this region, with a moderate ozone production, no significant vegetation fire events and several precipitation periods scavenging the aerosol. The period is modeled with the WRF (Weather Research and Forecasting) and CHIMERE models, and their ability to quantify the observed pollution transport events is presented. The CHIMERE model simulating all kinds of sources (anthropogenic, biogenic, mineral dust, vegetation fires); the aerosol speciation, not available with the measurements, is presented: during the whole period, the aerosol was mainly constituted by mineral dust, sea salt and sulfates close to the surface and mainly by mineral dust in the troposphere. Compared to the AERONET (Aerosol Robotic Network) size distribution, it is shown that the model underestimates the coarse mode near mineral dust sources and overestimates the fine mode in the Mediterranean area, highlighting the need to improve the model representation of the aerosol size distribution both during emissions, long-range transport and deposition.

scholarly journals Observations and regional modeling of aerosol optical properties, speciation and size distribution over Northern Africa and western Europe

2016 ◽  
Vol 16 (20) ◽  
pp. 12961-12982 ◽  
Author(s):  
Laurent Menut ◽  
Guillaume Siour ◽  
Sylvain Mailler ◽  
Florian Couvidat ◽  
Bertrand Bessagnet
Keyword(s):  
Size Distribution ◽  
Spatial Correlation ◽  
Western Europe ◽  
Fine Particles ◽  
Mineral Dust ◽  
Temporal Correlation ◽  
Aerosol Size Distribution ◽  
Relative Mass ◽  
Aerosol Composition ◽  
Inorganic Species

Abstract. The aerosol speciation and size distribution is modeled during the summer 2013 and over a large area encompassing Africa, Mediterranean and western Europe. The modeled aerosol is compared to available measurements such as the AERONET aerosol optical depth (AOD) and aerosol size distribution (ASD) and the EMEP network for surface concentrations of particulate matter PM2.5, PM10 and inorganic species (nitrate, sulfate and ammonium). The main goal of this study is to quantify the model ability to realistically model the speciation and size distribution of the aerosol. Results first showed that the long-range transport pathways are well reproduced and mainly constituted by mineral dust: spatial correlation is  ≈  0.9 for AOD and Ångström exponent, when temporal correlations show that the day-to-day variability is more difficult to reproduce. Over Europe, PM2.5 and PM10 have a mean temporal correlation of  ≈  0.4 but the lowest spatial correlation ( ≈  0.25 and 0.62, respectively), showing that the fine particles are not well localized or transported. Being short-lived species, the uncertainties on meteorology and emissions induce these lowest scores. However, time series of PM2.5 with the speciation show a good agreement between model and measurements and are useful for discriminating the aerosol composition. Using a classification from the south (Africa) to the north (northern Europe), it is shown that mineral dust relative mass contribution decreases from 50 to 10 % when nitrate increases from 0 to 20 % and all other species, sulfate, sea salt, ammonium, elemental carbon, primary organic matter, are constant. The secondary organic aerosol contribution is between 10 and 20 % with a maximum at the latitude of the Mediterranean Sea (Spanish stations). For inorganic species, it is shown that nitrate, sulfate and ammonium have a mean temporal correlation of 0.25, 0.37 and 0.17, respectively. The spatial correlation is better (0.25, 0.5 and 0.87), showing that the mean values may be biased but the spatial localization of sulfate and ammonium is well reproduced. The size distribution is compared to the AERONET product and it is shown that the model fairly reproduces the main values for the fine and coarse mode. In particular, for the fine mode, the model overestimates the aerosol mass in Africa and underestimates it in Europe.

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