Mobile Aerosol Observing System
The Mobile Aerosol Observing System is an instrument suite available for deployments with either ARM Mobile Facility and/or the ARM fixed sites. This system is also capable of being deployed independently in a field campaign.
Comprised of separate 20-ft containers, the Mobile Aerosol Observing System has one for aerosol and one for chemistry measurements, with integrated data acquisition systems, instrument controls, ventilation systems, and air pumps. Because of the unit’s portable nature, all instrument racks are shock mounted, and a small workbench is available for onsite maintenance and repair work.
The following instruments are part of the suite. The Mobile AOS is similar to the standard ARM AOS and the data and documentation are available through the AOS web page.
Aerosol Instruments
| Instrument Title | Instrument Mentor | Measurement Group | Measurements |
|---|---|---|---|
| Radar Wind Profiler (RWP) (new 1290 MHz, and existing 915Mhz) {upgrade} | Rich Coulter | Atmospheric State | Profiles of windspeed and direction (u,v,w) |
| SOnic Detection And Ranging (SODAR) System (1000 to 4000 Hz) | Rich Coulter | Atmospheric State | Wind velocity and direction (u,v,w) in the lower atmosphere |
| Ultra-High Sensitivity Aerosol Spectrometer (enhanced) | Dan Cziczo | Aerosols | Aerosol size and number from 50 nm to 1 micron |
| Dual Column Cloud Condensation Nuclei Counter (CCN) | Jason Tomlinson | Aerosols | Number of aerosols that activate to become cloud condensation nuclei two independently selectable supersaturations |
| Single Particle Soot Photometer (SP2) | Art Sedlacek | Aerosols | Black Carbon mass, size and composition, and single particle scattering of non-absorbing particles |
| Scanning Mobility Particle Sizer (SMPS) | Jian Wang | Aerosols | Aerosol size distribution from 15 nm to 450 nm |
| Photo-Acoustic Soot Spectrometer (PASS), 3 Wavelength | Manvendra Dubey | Aerosols | Aerosol absorption and scattering coefficient |
| Humidigraph (Scanning Relative Humidity with 3 single wavelength nephelometers) | Dan Cziczo | Aerosols | Aerosol scattering coefficient as a function of relative humidity. |
| Nephelometer, 3 Wavelength | Stephen Springston | Aerosols | Aerosol extinction coefficient |
| Condensation Particle Counter (CPC), 10 nm to >3000 nm particle size range | Stephen Springston | Aerosols | Condensation particle concentration, 10 nm to >3000 nm |
| Condensation Particle Counter (CPC), 2.5 nm to >3000 nm particle size range | Stephen Springston | Aerosols | Condensation particle concentration, 2.5 nm to >3000 nm |
| Hygroscopic Tandem Differential Mobility Analyzer (HTDMA) | Dan Cziczo | Aerosols | Aerosol growth factor as a function of humidity |
| Particle Soot Absorption Photometer (PSAP), 3 Wavelength | Stephen Springston | Aerosols | Aerosol absorption coefficient |
| 7-Wavelength Aethelometer | Stephen Springston | Aerosols | Optical Absorption |
| Weather Transmitter (WXT-520) | Stephen Springston | Atmospheric State | Temperature, relative humidity, wind speed and direction, rainfall, and barometric pressure |
Chemistry Instruments
| Instrument Title | Instrument Mentor | Measurement Group | Measurements |
|---|---|---|---|
| Trace Gas Instrument System (Research-Grade) | Stephen Springston | Gases | Carbon Monoxide, Sulphur Dioxide, Nitric Oxide/Nitrous Dioxide/Nitrogen Oxides, Ozone) [CO, SO2, NO/NO2/NOy, O3] |
| Particle Into Liquid Sampler-Ion Chromatography-Water Soluble Organic Carbon (PILS-IC-WSOC) | Yin-Nan Lee | Aerosols | Aerosol chemical composition, anions, cations, and water soluble organic carbon |
| Proton Transfer Mass Spectrometer (PTRMS) | Yin-Nan Lee | Aerosols | Volatile organic compounds |
| Aerosol Chemistry Speciation Monitor (ACSM) | Yin-Nan Lee | Gases | Aerosol mass and composisiton |
