Fig. 1
Map showing the location of the sampling site of Morogoro, Tanzania.
Fig. 2
Typical examples of 5-day backward air mass trajectories arriving at Morogoro during the May–August 2011 sampling period.
Fig. 3
Trends of aerosol mass concentrations (µg m−3) in PM2.5 and PM10 during the May–August 2011 sampling period at Morogoro.
{ label needed for table-wrap[@id='UT0001'] }
Table 1. Concentrations of TC and TN (µg m−3), their isotope ratios (‰), TC/TN and TC/PM (%) in PM2.5 from Morogoro, Tanzania (n=21)
30/5/2011−25.4NA6.1BDLNA22.4NA31/5/2011−25.816.17.20.513.921.81.61/6/2011−25.113.53.70.66.312.92.02/6/2011−25.9NA6.0BDLNA26.4NA4/6/2011−24.813.43.90.410.411.61.15/6/2011−24.315.34.50.411.517.81.66/6/2011−25.6NA7.4BDLNA20.3NA7/6/2011−25.614.15.30.412.822.11.79/6/2011−26.1NA3.1BDLNA19.0NA12/6/2011NANA4.5BDLNA17.5NA13/6/2011NANA7.90.613.720.61.528/7/2011−22.620.38.00.99.221.92.429/7/2011−22.013.510.41.47.634.74.61/8/2011−21.822.19.70.911.430.02.62/8/2011−20.617.29.71.56.323.73.83/8/2011−21.217.98.30.612.827.32.14/8/2011NANA6.60.710.210.81.15/8/2011−22.414.26.90.79.614.51.56/8/2011−21.3NA4.2BDLNA9.6NA7/8/2011−21.716.45.50.78.117.52.28/8/2011−21.816.87.70.613.520.81.5Mean±SD−23.6±1.916.2±2.76.5±2.10.7±0.310.5±2.620.8±6.42.2±1.0
Table 2. Concentrations of TC and TN (µg m−3), their isotope ratios (‰), TC/TN and TC/PM (%) in PM10 from Morogoro, Tanzania (n=21)
30/5/2011−24.010.46.00.79.213.31.431/5/2011−24.111.68.20.711.0NDNA1/6/2011−24.4NA6.8BDLNA11.8NA2/6/2011−24.4NA8.3BDLNA16.1NA4/6/2011−23.413.04.20.66.911.81.75/6/2011−23.012.96.40.79.317.71.96/6/2011−23.712.79.70.812.020.11.77/6/2011−23.913.47.50.710.318.21.89/6/2011−23.810.76.40.78.715.21.812/6/2011−23.811.29.30.811.616.81.413/6/2011−23.415.411.41.011.919.91.728/7/2011−23.913.45.90.610.212.01.229/7/2011−23.516.510.50.911.128.72.61/8/2011−22.717.016.01.213.220.31.52/8/2011−22.618.718.01.611.418.11.63/8/2011−22.414.612.60.914.121.31.54/8/2011−23.9NA11.7BDLNA14.6NA5/8/2011−23.812.98.80.811.215.51.46/8/2011−23.713.95.30.511.512.21.17/8/2011NANA9.80.812.117.81.58/8/2011−23.414.711.20.814.120.11.4Mean±SD−23.6±0.513.7±2.29.2±3.50.8±0.211.1±1.817.0±4.21.6±0.3
Table 3. Isotope ratios (‰) of carbon and nitrogen in the fine and coarse fractions of Morogoro, Tanzania, during 2011 wet and dry season campaigns
δ13Cfineδ13Ccoarseδ13Cfineδ13Ccoarseδ15Nfineδ15Ncoarseδ15Nfineδ15Ncoarse
Min.−26.1−23.8−22.6−30.813.47.113.55.8Max.−24.3−17.8−20.6−23.416.112.522.119.7Mean±SD−25.4±0.6−21.5±2.1−21.7±0.7−26.5±3.014.7±1.29.1±2.917.4±3.112.1±5.1
Fig. 4
Temporal variation of TC and δ13C in (a) PM2.5 and (b) PM10 during the May–August 2011 sampling period at Morogoro.
Fig. 5
Relation between TC with levoglucosan and nss-K+ in PM2.5 (a, b) and PM10 (c, d) during the sampling period.
Fig. 6
Temporal variation of TN and δ15N in (a) PM2.5 and (b) PM10 during the May–August 2011 sampling period at Morogoro.
Fig. 7
Relation between -N, -N and (+)-N with TN in (a) PM2.5 and (b) PM10 during the sampling period.
Fig. 8
Linear relation between δ13C of TC with nss-K+ and levoglucosan in (a, b) PM2.5 and (c, d) PM10 during the sampling period in tropical aerosols from Tanzania.
Fig. 9
Biomass burning active fire spots detected by MODIS satellite images (from NASA website) over southern and eastern Africa and Madagascar in July 2011.