Spectral reference line data relevant to remote sensing applications: a review and outline of the EUMETRISPEC project

Werhahn, Olav; Brunzendorf, J.; Nwaboh, Javis A.; Serdyukov, Anton; Werwein, Viktor; Ebert, Volker

doi:10.1117/12.2067358

Cited by 3 publications

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“…The traceability of the TDLAS H 2 O amount fraction results to the International System of Units (SI) is addressed by appropriate spectral line data for the used water transition (Pogány et al , ; Werhahn et al , ), e.g. collisional spectral broadening co‐efficients and transition line strength, as well as by the traceably measured gas pressure and temperature and the optical interaction path length (Nwaboh et al , ) independently determined beforehand.…”

Section: Resultsmentioning

confidence: 99%

The MeteoMet project – metrology for meteorology: challenges and results

Merlone

Lopardo

Sanna

et al. 2015

Meteorological Applications

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ABSTRACT:The study describes significant outcomes of the 'Metrology for Meteorology' project, MeteoMet, which is an attempt to bridge the meteorological and metrological communities. The concept of traceability, an idea used in both fields but with a subtle difference in meaning, is at the heart of the project. For meteorology, a traceable measurement is the one that can be traced back to a particular instrument, time and location. From a metrological perspective, traceability further implies that the measurement can be traced back to a primary realization of the quantity being measured in terms of the base units of the International System of Units, the SI. These two perspectives reflect long-standing differences in culture and practice and this project -and this study -represents only the first step towards better communication between the two communities. The 3 year MeteoMet project was funded by the European Metrology Research Program (EMRP) and involved 18 European National Metrological Institutes, 3 universities and 35 collaborating stakeholders including national meteorology organizations, research institutes, universities, associations and instrument companies. The project brought a metrological perspective to several long-standing measurement problems in meteorology and climatology, varying from conventional ground-based measurements to those made in the upper atmosphere. It included development and testing of novel instrumentation as well as improved calibration procedures and facilities, instrument intercomparison under realistic conditions and best practice dissemination. Additionally, the validation of historical temperature data series with respect to measurement uncertainties and a methodology for recalculation of the values were included.

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Section: Resultsmentioning

confidence: 99%

The MeteoMet project – metrology for meteorology: challenges and results

Merlone

Lopardo

Sanna

et al. 2015

Meteorological Applications

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“…line strength, collisional broadening parameters etc). Accurate (<1%), metrologically defined spectral data [237], have been measured recently for ammonia [238], water [214,239], hydrogen chloride [240,241], nitrous oxide [242,243], carbon dioxide [244], and carbon monoxide [245], but are frequently a leading source of uncertainty in TDLAS OGS-realisation. Furthermore, in dTDLAS, high path length cells require accurate length determination [246], while short cells, ask for careful suppression of parasitic absorption contributions [247].…”

Section: Tunable Diode Laser Absorption Spectroscopymentioning

confidence: 99%

Advances in reference materials and measurement techniques for greenhouse gas atmospheric observations

et al. 2019

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We present the global research landscape which aims to deliver a measurement infrastructure to underpin atmospheric observations of key greenhouse gases governing changes in the Earth's climate. These measurements present a significant challenge to the metrological community, analytical laboratories and major producers of reference materials. The review focuses on the progress made in the Gas Analysis Working Group of the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM-GAWG) in establishing the primary realisation of the amount-of-substance fraction for carbon dioxide, methane and nitrous oxide in an air matrix. It also focuses on the importance of providing traceable measurements of isotopic composition of these components for commutability of reference materials and for isotope ratio measurements for greenhouse gas source attribution. Metrologia 56 (2019) 034006 (29pp) P J Brewer et al 2 of the World Meteorological Organization (WMO) for providing the framework for the development and implementation of integrated greenhouse gas observations, which is vital for understanding the global carbon cycle and the role greenhouse gases play in climate change. The developments in analytical techniques are also discussed which have shaped the direction of the metrology required to meet the evolving and future needs of stakeholders.

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“…This problem will be addressed in the MetNH3 project. A recent project showed that traceable measurement of spectral line data of different analytes can be achieved, providing also considerably lower uncertainties than currently existing spectral databases [34]. Recently, a robust and flexible method has been developed to achieve traceable line intensities using tuneable diode laser absorption spectroscopy.…”

Section: Spectroscopic Detection Of Ammoniamentioning

confidence: 99%

A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air

Pogány

Balslev-Harder²,

Braban

et al. 2016

Meas. Sci. Technol.

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21Keywords 22 ammonia in ambient air, traceability, reference gas standards, optical transfer standard, validation and testing 23 infrastructure 24 Abstract 25The environmental impacts of ammonia (NH 3 ) in ambient air have become more evident in the recent decades, 26 leading to intensifying research in this field. A number of novel analytical techniques and monitoring 27 instruments have been developed, and the quality and availability of reference gas mixtures used for the 28 calibration of measuring instruments has also increased significantly. However, recent inter-comparison 29 measurements show significant discrepancies, indicating that the majority of the newly developed devices and 30 reference materials require further thorough validation. There is a clear need for more intensive metrological 31 research focusing on quality assurance, intercomparability and validations. MetNH3 (Metrology for ammonia in 32 ambient air) is a three-year project within the framework of the European Metrology Research Programme 33 (EMRP), which aims to bring metrological traceability to ambient ammonia measurements in the 0.5 -34 500 nmol/mol amount fraction range. This is addressed by working in three areas: 1) improving accuracy and 35 2 stability of static and dynamic reference gas mixtures, 2) developing an optical transfer standard and 3) 36 establishing the link between high-accuracy metrological standards and field measurements. In this article we 37 describe the concept, aims and first results of the project. 38

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Spectral reference line data relevant to remote sensing applications: a review and outline of the EUMETRISPEC project

Cited by 3 publications

References 0 publications

The MeteoMet project – metrology for meteorology: challenges and results

The MeteoMet project – metrology for meteorology: challenges and results

Advances in reference materials and measurement techniques for greenhouse gas atmospheric observations

A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air

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