| Zugriffsnummer | 29751 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Towards traceability in CO2 line strength measurements by TDLAS at 2.7 μm |
| Autor(in); Institution |
Pogány, Andrea; 3.2, Gasanalytik und Zustandsverhalten, PTB-Braunschweig
Ott, Oliver; 3.2, Gasanalytik und Zustandsverhalten, PTB-Braunschweig
Werhahn, Olav; 3.2, Gasanalytik und Zustandsverhalten, PTB-Braunschweig
Ebert, Volker; 3.2, Gasanalytik und Zustandsverhalten, PTB-Braunschweig
|
| Quelle/Jahr | HITRAN 2012. Journal of Quantitative Spectroscopy and Radiative Transfer: 130 (2013), 147 - 157 |
| ISSN | 0022-4073 (PRINT) ; 1879-1352 (ONLINE) |
| DOI | |
| Verlag | Oxford [u.a.]: Pergamon Press |
| Freie Schlagworte | Tunable diode laser absorption spectroscopy ; Carbon dioxide ; Line strength ; Traceability ; Uncertainty |
| Zusammenfassung | Direct tunable diode laser absorption spectroscopy (TDLAS) was combined in this study with metrological principles on the determination of uncertainties to measure the line strengths of the P36e and P34e line of 12C16O2 in the ν1+ν3 band at 2.7 mm. Special emphasis was put on traceability and a concise,well-documented uncertainty assessment. We have quantitatively analyzed the uncertainty contributions of different experimental parameters to the uncertainty of the line strength.Establishment of the wavenumbe raxis and the gas handling procedure proved to be the two major contributors to the final uncertainty. The obtained line strengths at 296 K are 1.593×10–20 cm/molecule for the P36e and 1.981×10–20 cm/molecule for the P34e line, with relative expanded uncertain ties of 1.1 % and 1.3 %, respectively (k=2, corresponding to a 95 % confidence level).The measured line strength values are in agreement with literature data (line strengths listed in the HITRAN and GEISA databases), but show an uncertainty, which is at least a factor of 2 lower. |
| Innovationscluster | Umwelt und Klima |