Aerosol chemistry studies at the SMEARIII station in Kumpula

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Presentation transcript:

Aerosol chemistry studies at the SMEARIII station in Kumpula Risto Hillamo Finnish Meteorological Institute, Aerosol research 14/11/18

Kumpula SMEAR III station Instrument container Tower Risto Hillamo 14/11/18

Aerosol measurements at the SMEAR III Particle number concentration Condensation particle counter (TSI3022) 1 min Jan01 Light absorbing coefficient Particle/Soot Absorption Photodetector, PSAP Jan07 Light scattering coefficient Nephelometer, TSI, model 3650 Dec06 Particulate mass (PM2.5) Ambient Particulate Monitor (TEOM) 30 min Oct04 Volatilazation in PM2.5 measurement Filter Dynamics Measurement system (FDMS) Aerosol particle number size distribution (3-1000 nm) Twin differential Mobility Particle Sizer (DMPS 3025+3010) 10 min May97 Aerosol particle number size distribution (500-2000 nm) Aerodynamical particle sizer, APS (TSI3321) May05 Black carbon mass concentration Aethalometer (AE-16) 1 min Mass concentration of ionic species Particle into liquid sampler (PILS, Methrom Co.) coupled with two ion chromatography systems 15 min Feb06 (ICS-2000, Dionex) Mass concentration of elemental and organic carbon EC/OC 3 h Jun06 24 h sampling for particles smaller than 1 µm (PM1) Water-soluble organic carbon, concentrations and size distributions Risto Hillamo 14/11/18

PM2.5 in Helsinki: biomass combustion Most of the data based on 24-h samples Levoglucosan sources: residential heating, wild fires Risto Hillamo 14/11/18

Carbonaceous fraction The mean contribution of OC, EC, WSOC and carbon in levoglucosan during the episodes and the non-episodic period. % of TC Non-episodic Episode 1 Episode 2 OC 68 76 81 EC 32 24 19 WSOC 44 50 C(levog) 0.5 0.9 0.8 Risto Hillamo 14/11/18

Nitrate and sulfate concentrations from Jun 17, 2006 to Nov 26, 2006. Risto Hillamo 14/11/18

OC and EC concentrations from Jun 2006 to Jan 2007. Risto Hillamo 14/11/18

OC/EC ratios. Risto Hillamo 14/11/18

Some conclusions Biomass combustion aerosols contribute much mass concentration in Helsinki High time-resolution chemistry measurements needed for understanding of aerosol chemistry Urban aerosol concentration is a sum of various factors: emissions, secondary formation, transformation, mixing in the atmosphere (+ long-range transport) Risto Hillamo 14/11/18