Measurements of PM10 ions and trace gases with the online system MARGA at the research station Melpitz in Germany - A five-year study

Publikationstyp

Wissenschaftlicher Artikel

Erscheinungsjahr

2018

DOI

https://doi.org/10.60810/openumwelt-1748

Measurements of PM10 ions and trace gases with the online system MARGA at the research station Melpitz in Germany - A five-year study

Autor:innen

Herausgeber

Quelle

Journal of Atmospheric Chemistry
75 (2018), Heft 1, 1 Onlineressource (pp 33-70)

Schlagwörter

Förderkennzeichen (FKZ)

Forschungskennzahl

Verbundene Publikation

Zitation

Measurements of PM10 ions and trace gases with the online system MARGA at the research station Melpitz in Germany - A five-year study. (2018). Journal of Atmospheric Chemistry, 75 (2018), Heft 1, 1 Onlineressource (pp 33-70). https://doi.org/10.60810/openumwelt-1748

Zusammenfassung englisch

An hourly quantification of inorganic water-soluble PM10 ions and corresponding trace gases was performed using the Monitor for AeRosols and Gases in ambient Air (MARGA) at the TROPOS research site in Melpitz, Germany. The data availability amounts to over 80% for the five-year measurement period from 2010 to 2014. Comparisons were performed for the evaluation of the MARGA, resulting in coefficients of determinations (slopes) of 0.91 (0.90) for the measurements against the SO2 gas monitor, 0.84 (0.88), 0.79 (1.39), 0.85 (1.20) for the ACSM NO3 â Ì, SO4 2â Ì and NH4 + measurements, respectively, and 0.85 (0.65), 0.88 (0.68), 0.91 (0.83), 0.86 (0.82) for the filter measurements of Clâ Ì, NO3 â Ì, SO4 2â Ì and NH4 +, respectively. A HONO comparison with a batch denuder shows large scatter (R2 = 0.41). The MARGA HNO3 is underestimated compared to a batch and coated denuder with shorter inlets (slopes of 0.16 and 0.08, respectively). Less NH3 was observed in coated denuders for high ambient concentrations. Long-time measurements show clear daily and seasonal variabilities. Potential Source Contribution Function (PSCF) analysis indicates the emission area of particulate ions Clâ Ì, NO3 â Ì, SO4 2â Ì, NH4 +, K+ and gaseous SO2 to lie in eastern European countries, predominantly in wintertime. Coarse mode sea salt particles are transported from the North Sea to Melpitz. The particles at Melpitz are nearly neutralised with a mean molar ratio of 0.90 for the five-year study. A slight increase of the neutralization ratio over the last three years indicates a stronger decrease of the anthropogenically emitted NO3 â Ì and SO4 2â Ì compared to NH4 +. © The Author(s) 2017