The following plots are automatically generated. The data represent raw data and have not undergone quality control.

(Version with all figures shown together)

Live webcam and meteorology data

Webcam source: SWITCH ( Meteorology data provided by partner MeteoSwiss.

Aerosol number concentrations

Time series of total aerosol particle number concentrations. The measurements are performed with a Condensation Particle Counter (CPC) and a Scanning Mobility Particle Sizer (SMPS; integrated concentrations) at the Jungfraujoch Observatory (Sphinx), as well as with a CPC at the nearby East Ridge site. Measurements of Cloud Condensation Nuclei Concentrations (CCNC; at a supersaturation of 1%) are currently unavailable. Responsible partner: PSI.

Concentrations of Ice-Nucleating Particles (INPs)

Concentrations of Ice-Nucleating Particles (INPs) measured from Jungfraujoch Observatory. INPs are a small but important part of the total aerosol — they are the particles responsible for ice formation in clouds. Responsible partner: IAC, ETH.

Aerosol number size distributions

The size distributions of fine aerosol particles as measured by a Scanning Mobility Particle Sizer at Jungfraujoch Observatory. The colours indicate the number concentrations of particles of a given size: reds mean high particle concentrations while purples, blues and greens mean low particles concentrations. The particle sizes are indicated on the y-axis scale (mobility diameter). Responsible partner: PSI.

Aerosol optical properties: scattering and absorption

Time series of aerosol optical properties at different wavelengths measured at Jungfraujoch Observatory. The ability of aerosol particles to scatter light is represented by total and backwards-hemispheric light scattering coefficients measured by two separate instruments: a TSI and an AirPhoton nephelometer. Light absorption by aerosol particles is shown as aerosol absorption coefficients measured with a 7-wavelength aethalometer (AE33). Responsible partner: PSI.

Black carbon concentrations

Black carbon, or soot, is an important part of the total aerosol because it absorbs light and causes atmospheric warming. Black carbon is also a good tracer for pollution from vehicles and wildfires. At Jungfraujoch Observatory and the nearby East Ridge site black carbon mass concentrations are measured by absorption photometers (MAAP, AE33). Responsible partner: PSI.