aosco

As of 5 August, 2015, Los Gatos Research (LGR) CO/H2O/N2O analyzer instruments (COANALYZERs) were deployed in the Atmospheric Radiation Measurement (ARM) Aerial Facility (AAF), the third ARM Mobile Facility (AMF3) Aerosol Observing System (AOS), Eastern North Atlantic (ENA) AOS, and Mobile AOS (MAOS-C).

The N2O/CO analyzer uses LGR s patented Off-axis ICOS technology, which employs a high-finesse optical cavity as the measurement cell. LGR s technology has many proven advantages over conventional first-generation cavity ringdown spectroscopy (CRDS) techniques. In brief, since the laser beam does not have to be resonantly coupled to the measurement cell, precise beam alignment is not critical. Mentors can disassemble the cell for cleaning (CAREFULLY) the front surface mirrors. Analyzers are relatively inexpensive and inherently robust thermally and mechanically. In addition, since LGR s technology can record reliable absorption spectra over a far wider range of optical depths (absorbance values) than CRDS, LGR analyzers provide measurements over a much wider range of mixing ratios (gas concentrations). The N2O/CO analyzer includes an internal computer that sends real-time data to the local instrument computer through its digital (RS-232) output.

Nitrous oxide (N2O) mixing ratio calculated with nominal sensitivity correction
Water vapor mixing ratio calculated with nominal sensitivity correction
Carbon monoxide (CO) mixing ratio corrected for water vapor concentration and calculated with nominal sensitivity correction

Gunnison, CO, USA; Mobile Facility (SAIL) - Gunnison, CO; AMF2 (main site for SAIL)

• Latitude: 38.956158
• Longitude: -106.987856
• Publication Date: 2021-09-01
• Start Date: 2021-09-01
• End Date: 2021-10-15
• Last Updated: 2022-04-15

Gunnison, CO, USA; Mobile Facility (SAIL) - Gunnison, CO; Supplemental Facility 2

• Latitude: 38.898361
• Longitude: -106.94314
• Publication Date: 2021-10-25
• Start Date: 2021-10-25
• End Date: 2023-06-16
• Last Updated: 2023-06-30

https://www.arm.gov/connect-with-arm/organization/instrument-mentors/list#co-analyzer

Rebecca Trojanowski

Brookhaven National Laboratory

Christopher Hayes

Brookhaven National Laboratory

http://dx.doi.org/10.5439/1351064
Atmospheric Radiation Measurement (ARM) user facility. 2021. Carbon Monoxide Analyzer (AOSCO). 2021-09-01 to 2021-10-15, ARM Mobile Facility (GUC) Gunnison, CO; AMF2 (main site for SAIL) (M1). Compiled by R. Trojanowski, S. Springston and A. Koontz. ARM Data Center. Data set accessed at http://dx.doi.org/10.5439/1351064.