IAO-IOP2018-Summer Field Study Started

Innsbruck Atmospheric Observatory (IAO) started the summer 2018 intensive observation period. The aims of the study include:

• quantifing and characterizing urban summertime emissions of various trace gases
• improving our understanding of the NO-NO2-O3 triad in an urban environment
• relating flux ratios (NOx/CO2, CO/CO2) above the urban canopy to the respective enhancement ratios at street level

The Following instrumentation is operated at two ground sites:

IAO Rooftop Tower

• Sonic anemometers (CSAT) at 609m, 614m and 617m elevation [EC]
• Closed-Path IRGA (EC155) for fast H2O and CO2 mixing ratios at 617m [EC]
• Inlet of a high flow manifold colocated with CSAT at 617m for the chemical anaysis of trace gases by
  • Two channel NO/NOx monitor (CLD 899 Y; Ecophysics) [EC]
  • Cavity RingDown Spectrometer (CaRDS; Los Gatos)  for direct measurement of NO2 [EC]
  • Chemical Ionization Mass Spectrometry (CIMS) for various volatile organic compounds using a  PTR-Qi-TOF (Ionicon) in H3O+ and NO+ mode [EC]
  • Quantum Cascade Laser (QCL) Spectrometer (Aerodyne Research) for CO, CH4, CO2 and possibly OCS and N2O [EC] operated by Georg Wohlfahrt and Albin Hammerle
  • Fast Ozone Sensor (FOS; Sextant Technology) base on chemiluminenscence of O3 and courmarin [EC]
  • Ozone monitor (APOA260; Horiba) for the continuous calibration of the FOS
• Remote sensing of NO2, O3,… by DOAS (Pandora; Luftblick) providing  whole atmosphere column as well as near-surface volume concentration products
• Four component radiation sensor (CNR4) as well as T, rH at 617m

[EC] marks intruments with high sampling rates for eddy covariance capability

IAO Roadside Station

• Remote sensing of vertical wind profiles by Doppler wind LIDAR
• Sonic anemometer and IRGA (CPEC) at 577m elevation
• Inlet of a manifold colocated with CPEC at 577m for the chemical analysis of trace gases by
  • NO/NOx monitor (APNA360, Horiba)
  • CO monitor (APMA360, Horiba)
  • Ozone monitor (ML8810)
• Four component radiation sensor (CNR4) as well as T, rH at 577m

Beyond these two stations mobile DOAS measurements will be operated from a passenger car along the Inn valley between Schwaz and Kematen by Stefan Schreier.