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Mobile Aerosol Measurement in the Eastern Mediterranean – A Utilization of Portable Instruments

Category: Control Techniques and Strategy

Volume: 17 | Issue: 7 | Pages: 1875-1886
DOI: 10.4209/aaqr.2016.11.0479
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Tareq Hussein 1, Brandon E. Boor2, Vanessa N. dos Santos3, Juha Kangasluoma3, Tuukka Petäjä3, Heikki Lihavainen4

  • 1 Department of Physics, The University of Jordan, Amman 11942, Jordan
  • 2 Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA
  • 3 Department of Physics, University of Helsinki, 00100 Helsinki, Finland
  • 4 Finnish Meteorological Institute, 00560 Helsinki, Finland

Highlights

Particulate matter and black carbon concentrations in Jordan.
Submicron particle concentrations are the highest in populated urban locations.
Micron particle concentrations are the highest in the southern part of Jordan.
Jafr, in east Jordan, had the lowest submicron particle concentration (< 1000 cm–3).
The PM1 fraction comprised about 40–75% of the PM10 concentrations.


Abstract

Air pollution research and reports have been limited in the Middle East, especially in Jordan with respect to aerosol particle number concentrations. In this study, we utilized a simple “mobile setup” to measure, for the first time, the spatial variation of aerosol concentrations in Eastern Mediterranean. The mobile setup consisted of portable aerosol instruments to measure particle number concentrations (cut off sizes 0.01, 0.02, 0.3, 0.5, 1, 2.5, 5, and 10 µm), particle mass concentrations (PM1, PM2.5, and PM10), and black carbon concentration all situated on the back seat of a sedan car. The car was driven with open windows to ensure sufficient cabin air ventilation for reliable outdoor aerosol sampling. Although the measurement campaign was two days long, but it provided preliminary information about aerosols concentrations over a large spatial scale that covered more than three quarters of Jordan. We should keep in mind that the presented concentrations reflect on road conditions. The submicron particle concentrations were the highest in the urban locations (e.g., Amman and Zarqa) and inside cities with heavy duty vehicles activities (e.g., Azraq). The highest micron particle concentrations were observed in the southern part of the country and in places close to the desert area (e.g., Wadi Rum and Wadi Araba). The average submicron concentration was 4.9 × 103 – 120 × 103 cm–3 (5.7–86.7 µg m–3) whereas the average micron particle concentration was 1–11 cm–3 (8–150 µg m–3, assume ρp = 1 g cm–3). The main road passing through Jafr in the eastern part of Jordan exhibited submicron concentration as low as 800 cm–3. The PM10 concentration consisted of about 40–75% as PM1. The black carbon (BC) concentration variation was in good agreement with the PM1 as well as the submicron particle number concentration.

Keywords

Particulate matter Particle number Black carbon Urban aerosols On-street aerosols sampling


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