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Temporal and vertical variations of aerosol physical and chemical properties over West Africa: AMMA aircraft campaign in summer 2006

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Fig. 1. Time scale of the AMMA Special Observation Periods (SOP) and flight hours of the intensive aircraft measurements
Fig. 3. Five-day backward trajectory calculations of air-masses arriving along the tracks of the ATR-42 aircraft during the three AMMA SOPs.
Fig. 4. Mean particle number size distributions observed in the monsoon layer, Saharan air layer (SAL), and free troposphere from vertical exploration of the atmosphere in the vicinity of Niamey dur-ing the three AMMA SOPs corresponddur-ing to “dry”, “mon
Table 1. Parameters (number concentration (n i ), geometric standard deviation (σ i ), and number median particle diameter (m i )) for the mean particle size distributions shown in Fig
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