Evaluation of factors affecting accurate measurements of atmospheric CO2 and CH4 by wavelength-scanned cavity ring-down spectroscopy

Nara, H.; Tanimoto, H.; Tohjima, Y.; Mukai, H.; Nojiri, Y.; Katsumata, K.; Rella, C.
July 2012
Atmospheric Measurement Techniques Discussions;2012, Vol. 5 Issue 4, p5009
Academic Journal
The article presents a study which assesses the factors influencing accurate measurements of atmospheric carbon dioxide (CO2) and methane (CH4) using wavelength-scanned cavity ring-down spectroscopy. It determined the delta coefficients defined as the difference in the pressure-broadening coefficients of oxygen (O2) and argon (Ar).


Related Articles

  • H2S interference on CO2 isotopic measurements using a Picarro G1101-i cavity ring-down spectrometer. Malowany, K.; Stix, J.; Van Pelt, A.; Lucic, G. // Atmospheric Measurement Techniques;2015, Vol. 8 Issue 10, p4075 

    Cavity ring-down spectrometers (CRDSs) have the capacity to make isotopic measurements of CO2 where concentrations range from atmospheric (~400 ppm) to 6000 ppm. Following field trials, it has come to light that the spectrographic lines used for CO2 have an interference with elevated (higher...

  • High-accuracy continuous airborne measurements of greenhouse gases (CO2 and CH4 ) using the cavity ring-down spectroscopy (CRDS) technique. Chen, H.; Winderlich, J.; Gerbig, C.; Hoefer, A.; Rella, C. W.; Crosson, E. R.; Van Pelt, A. D.; Steinbach, J.; Kolle, O.; Beck, V.; Daube, B. C.; Gottlieb, E. W.; Chow, V. Y.; Santoni, G. W.; Wofsy, S. C. // Atmospheric Measurement Techniques;2010, Vol. 3 Issue 2, p375 

    The article focuses on the use of cavity ring-down spectroscopy (CRDS) to obtain accurate measurements of carbon dioxide (CO2) and methane (CH4) greenhouse gases in the phase B campaign of Balanço Atmosférico Regional de Carbono na Amazônia in May 2009 in Brazil. It says that measuring...

  • Electronic DFB laser switching for continuous wave cavity ring-down spectroscopy. Földes, T.; Čermák, P.; Rakovský, J.; Macko, M.; Krištof, J.; Veis, P.; Macko, P. // Electronics Letters;4/1/2010, Vol. 46 Issue 7, p523 

    Continuous wave cavity ring-down spectroscopy using an electronically switched telecom distributed feedback laser module is demonstrated. By adding a compensation waveform current to the step-function switched laser current the laser wavelength stabilisation time is reduced to about 4 ms...

  • Comparison of continuous in-situ CO2 observations at Jungfraujoch using two different measurement techniques. Schibig, M. F.; Steinbacher, M.; Buchmann, B.; van der Laan-Luijkx, I. T.; van der Laan, S.; Ranjan, S.; Leuenberger, M. C. // Atmospheric Measurement Techniques Discussions;2014, Vol. 7 Issue 7, p7053 

    Since 2004, atmospheric carbon dioxide (CO2) is measured at the High Altitude Research Station Jungfraujoch by the division of Climate and Environmental Physics at the University of Bern (KUP) using a nondispersive infrared gas analyzer (NDIR) in combination with a paramagnetic O2 analyzer. In...

  • In-situ measurement of atmospheric CO2 at the four WMO/GAW stations in China. S. X. Fang; L. X. Zhou; P. P. Tans; Ciais, P.; Steinbacher, M.; L. Xu; T. Luan // Atmospheric Chemistry & Physics Discussions;2013, Vol. 13 Issue 10, p27287 

    Atmospheric carbon dioxide (CO2) mole fractions were continuously measured from January 2009 to December 2011 at 4 atmospheric observatories in China ((Lin'an, LAN), (Longfengshan, LFS), (Shangdianzi, SDZ), and (Waliguan, WLG)) using Cavity Ring Down Spectroscopy instruments. All sites are...

  • Determination of the OH radical in atmospheric pressure dielectric barrier discharge plasmas using near infrared cavity ring-down spectroscopy. Liu, Z. W.; Yang, X. F.; Zhu, A. M.; Zhao, G. L.; Xu, Y. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Dec2008, Vol. 48 Issue 3, p365 

    The hydroxyl radical (OH) plays an important role in combustion systems, atmospheric chemistry and the removal of air pollutants by non-thermal plasmas. The present work reports the determination of the hydroxyl radicals in atmospheric dielectric barrier discharge plasmas via near infrared...

  • CRDS study of auto-ionizing Rydberg states of argon in a microwave discharge. van der Ende, B. M.; Winslade, C.; Brooks, R. L.; deLaat, R. H.; Westwood, N. P.C. // Canadian Journal of Physics;May2009, Vol. 87 Issue 5, p575 

    Optical transitions from two microwave discharge excited states of argon have been observed using cavity ring-down spectroscopy. These transitions originate on the high-lying levels, 3d[1/2]1° and 3d[3/2]2°, and terminate on the nf ′[5/2] Rydberg (n = 8 to 22) levels, which, except...

  • Continuous wave cavity ring down spectroscopy measurements of velocity distribution functions of argon ions in a helicon plasma. Chakraborty Thakur, Saikat; McCarren, Dustin; Carr, Jerry; Scime, Earl E. // Review of Scientific Instruments;Feb2012, Vol. 83 Issue 2, p023508 

    We report continuous wave cavity ring down spectroscopy (CW-CRDS) measurements of ion velocity distribution functions (VDFs) in low pressure argon helicon plasma (magnetic field strength of 600 G, Te ≈ 4 eV and n ≈ 5 × 1011 cm-3). Laser induced fluorescence (LIF) is routinely...

  • Using a DS-DBR laser for widely tunable near-infrared cavity ring-down spectroscopy. Whittaker, K.; Ciaffoni, L.; Hancock, G.; Hurst, P.; Peverall, R.; Ritchie, G. // Applied Physics B: Lasers & Optics;Jul2014, Vol. 116 Issue 1, p157 

    Studies into the suitability of a novel, widely tunable telecom L-band (1,563-1,613 nm) digital supermode distributed Bragg reflector (DS-DBR) laser for cavity ring-down spectroscopy (CRDS) are presented. The spectrometer comprised of a 36.6 cm long linear cavity with ring-down times varying...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics