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Independent tests show that the performance of the AtmospherIQ optical bench is comparable to other gas analysis technologies currently used in atmospheric monitoring stations.
Allan deviation characterization, the statistical method widely used for evaluating atmospheric monitoring gas analyzers, show that AtmospherIQ Gas Analyzers meet or exceed the performance requirements of the WMO and ICOS.
The technology underpinning AtmospherIQ Gas Analyzers has been independently verified by the ICOS Atmosphere Thematic Centre (ATC), Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Paris to appraise precision, drift, pressure stability, water correction, and several other key specifications.
Results show that the AtmospherIQ optical bench meets requirements for compatibility with World Meteorological Organization Global Atmosphere Watch (WMO GAW) and ICOS specifications.
| ICOS Standard | AtmospherIQ Analyzer Performance | ||
|---|---|---|---|
| CH4 | Precision 1 σ; 1 hour | < 0.5 ppb | < 0.05 ppb (LI-8810) |
| Repeatability (1 σ), 10 min avg | < 0.5 ppb | < 0.4 ppb (LI-8810) | |
| CO2 | Precision 1 σ; 1 hour | < 25 ppb | < 10 ppb (LI-8815) |
| Repeatability (1 σ), 10 min avg | < 50 ppb | < 45 ppb (LI-8815) | |
| N2O | Precision 1 σ; 1 hour | < 0.05 ppb | < 0.05 ppb (LI-8820) |
| Repeatability (1 σ), 10 min avg | < 0.1 ppb | < 0.1 ppb (LI-8820) |
The technology underpinning AtmospherIQ Gas Analyzers has been independently verified by the ICOS Atmosphere Thematic Centre (ATC), Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Paris to appraise precision, drift, pressure stability, water correction, and several other key specifications.
Results show that the AtmospherIQ optical bench meets requirements for compatibility with World Meteorological Organization Global Atmosphere Watch (WMO GAW) and ICOS specifications.
| ICOS Standard | AtmospherIQ Analyzer Performance | ||
|---|---|---|---|
| CH4 | Precision 1 σ; 1 hour | < 0.5 ppb | < 0.05 ppb (LI-8810) |
| Repeatability (1 σ), 10 min avg | < 0.5 ppb | < 0.4 ppb (LI-8810) | |
| CO2 | Precision 1 σ; 1 hour | < 25 ppb | < 10 ppb (LI-8815) |
| Repeatability (1 σ), 10 min avg | < 50 ppb | < 45 ppb (LI-8815) | |
| N2O | Precision 1 σ; 1 hour | < 0.05 ppb | < 0.05 ppb (LI-8820) |
| Repeatability (1 σ), 10 min avg | < 0.1 ppb | < 0.1 ppb (LI-8820) |
Scripps Institution of Oceanography, University of California, USA, completed a series of experiments to assess the performance of analyzers using the AtmospherIQ optical bench, with reference to World Meteorological Organization Global Atmosphere Watch (WMO GAW) inter-laboratory measurement compatibility goals (GGMT-2019). They concluded that “these experiments confirm the suitability of the LI-7810 and LI-7815 instruments for long term measurements of atmospheric methane and carbon dioxide respectively.”
Now, the AtmospherIQ optical bench evaluated at Scripps is optimized for long-term atmospheric monitoring infrastructure.
Instruments with the AtmospherIQ optical bench were deployed for six months at the Atmospheric Research Station at Mace Head, Carna, County Galway, located on the far west coast of Ireland. Instruments were operated in parallel with a CH4/CO2/CO/H2O analyzer, which is permanently installed at the facility and reports data to both ICOS and WMO GAW networks.
Trial results show that instruments with the AtmospherIQ optical bench meet the requirements for ICOS and WMO GAW networks when used with an appropriate calibration strategy.
READ THE REPORTAtmospherIQ Gas Analyzers deliver data that is repeatable, dependable, and traceable to calibration standards. Independent assessments confirm that the performance meets the high standards of monitoring organizations and is comparable to or better than other leading measurement technologies.
AtmospherIQ Gas Analyzers offer comparable or better stability and accuracy than other analyzers used for atmospheric monitoring.
The LI-8810 measures methane gas in air with accuracy and precision that exceeds requirements of ICOS and the WMO.
| WMO Compatility Goal | ICOS Standard (Precision 1 σ) | LI-COR LI-8810 (Precision 1 σ) |
|---|---|---|
| ± 2 ppb | < 0.5 ppb (1 hour) | < 0.05 ppb (1 hour) |
| WMO Compatility Goal | ICOS Standard (Precision 1 σ) | LI-COR LI-8815 (Precision 1 σ) |
|---|---|---|
| ± 100 ppb / ± 50 ppb* | < 25 ppb (1 hour) | < 10 ppb (1 hour) |
*Southern hemisphere
Atmospheric carbon dioxide measurements by the LI-8815 satisfy standards set by ICOS and the WMO, while overachieving on the stability and precision expectations.
Accurate quantification of atmospheric N2O is challenging due to its low ambient concentrations and the subtle variations that demand high precision. With LI-COR's cutting-edge technology, LI-8820 delivers sub-ppb precision N2O measurements that meet requirements of leading atmospheric monitoring organizations.
| WMO Compatility Goal | ICOS Standard (Precision 1 σ) | LI-COR LI-8820 (Precision 1 σ) |
|---|---|---|
| ± 0.1 ppb | < 0.05 ppb (1 hour) | < 0.05 ppb (1 hour) |
By design, it is simple to add an AtmospherIQ Gas Analyzer to existing monitoring infrastructure.
AtmospherIQ Gas Analyzers are designed for durability and low maintenance operation and are backed by technical support from dedicated application scientists.
You can rest assured that your measurement needs are our priority.
The AtmospherIQ optical bench was evaluated at Mace Head research station. Results show that the analyzers are well suited for modern atmospheric monitoring needs.
