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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2016

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Tropospheric mercury vertical profiles between 500 and 10 000m in central Europe

Anno di pubblicazione: 2016

Formato: Elettronico

Autori: AndreasWeigelt 1, Ralf Ebinghaus 1, Nicola Pirrone 2, Johannes Bieser 1,3, Jan Bödewadt1, Giulio Esposito 2, Franz Slemr 4, Peter F. J. van Velthoven 5, Andreas Zahn 6, and Helmut Ziereis 3

Affiliazioni autori: 1 Helmholtz-Zentrum Geesthacht (HZG), Institute of Coastal Research, Geesthacht, Germany 2 National Research Council (CNR), Institute of Atmospheric Pollution Research, Rende, Italy 3 Deutsches Zentrum fu?r Luft- und Raumfahrt (DLR), Institute of Atmospheric Physics, Oberpfaffenhofen, Germany 4 Max-Planck-Institute for Chemistry (MPI-C), Department of Atmospheric Chemistry, Mainz, Germany 5 Royal Netherlands Meteorological Institute (KNMI), Chemistry and Climate Division, De Bilt, the Netherlands 6 Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research, Karlsruhe, Germany anow at Federal Maritime and Hydrographic Agency (BSH), Hamburg, Germany

Autori CNR:

  • GIULIO ESPOSITO
  • NICOLA PIRRONE

Lingua: inglese

Abstract: The knowledge of the vertical distribution of atmospheric mercury (Hg) plays an important role in determining the transport and cycling of mercury. However, measurements of the vertical distribution are rare, because airborne measurements are expensive and labour intensive. Consequently, only a few vertical Hg profile measurements have been reported since the 1970s. Besides the Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container (CARIBIC) observations, the latest vertical profile over Europe was measured in 1996. Within the Global Mercury Observation System (GMOS) project, four vertical profiles were taken on board research aircraft (CASA-212) in August 2013 in background air over different locations in Slovenia and Germany. Each vertical profile consists of at least seven 5 min horizontal flight sections from 500m above ground to 3000ma.s.l. Gaseous elemental mercury (GEM) and total gaseous mercury (TGM) were measured with Tekran 2537X and Tekran 2537B analysers. In addition to the mercury measurements, SO2, CO, O3, NO, and NO2, basic meteorological parameters (pressure, temperature, relative humidity) have been measured. Additional ground-based mercury measurements at the GMOS master site in Waldhof, Germany and measurements onboard the CARIBIC passenger aircraft were used to extend the profile to the ground and upper troposphere respectively. No vertical gradient was found inside the well-mixed boundary layer (variation of less than 0.1 ngm?3/ at different sites, with GEM varying from location to location between 1.4 and 1.6 ngm?3 (standard temperature and pressure, STP: T D273.15 K, p D1013.25 hPa). At all locations GEM dropped to 1.3 ngm?3 (STP) when entering the free troposphere and remained constant at higher altitudes. The combination of the vertical profile, measured on 21 August 2013 over Leipzig, Germany, with the CARIBIC measurements during ascent and descent to Frankfurt Airport, Germany, taken at approximately the same time, provide a unique central European vertical profile from inside theboundary layer (550ma.s.l) to the upper free troposphere (10 500ma.s.l.) and show a fairly constant free-troposphericTGM concentration of 1.3 ngm?3 (STP).

Lingua abstract: inglese

Pagine da: 4135

Pagine a: 4146

Pagine totali: 12

Rivista:

Atmospheric chemistry and physics Copernicus Publ.
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1680-7324

Numero volume: 16

DOI: 10.5194/acp-16-4135-2016

Referee: Sì: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • troposphere
  • mercury
  • measurements
  • pollution

URL: http://www.atmos-chem-phys.net/16/4135/2016/

Strutture CNR:

Moduli:

Allegati: Tropospheric mercury vertical profiles between 500 and 10 000m in central Europe (application/pdf)

 
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