Near infrared cavity ring-down spectroscopy for isotopic analyses of CH4 on future Martian surface missions

Chen, Y.; Mahaffy, P. R.; Holmes, Vincent; Burris, J.; Morey, Peter A.; Lehmann, Kevin K.; Lollar, Barbara Sherwood; Lacrampe-Couloume, Georges; Onstott, Tullis C.

doi:10.1016/j.pss.2014.11.016

Cited by 28 publications

(5 citation statements)

References 28 publications

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“…Water extract analysis, concentrations of methane and sulfate were obtained at the Soil Cryology Laboratory, Institute of Physicochemical and Biological Problems in Soil Science, Pushchino, Russia. The isotopic signature of methane gas collected inside boreholes was detected using a custom built near-infrared continuous-wave cavity ringdown spectrometer [39] at the Princeton University, Princeton, United States.…”

Section: Sample Description and Geochemical Analysismentioning

confidence: 99%

Microbial life in 25-m-deep boreholes in ancient permafrost illuminated by metagenomics

Almatari

Cyr

et al. 2023

Environmental Microbiome

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This study describes the composition and potential metabolic adaptation of microbial communities in northeastern Siberia, a repository of the oldest permafrost in the Northern Hemisphere. Samples of contrasting depth (1.75 to 25.1 m below surface), age (from ~ 10 kyr to 1.1 Myr) and salinity (from low 0.1–0.2 ppt and brackish 0.3–1.3 ppt to saline 6.1 ppt) were collected from freshwater permafrost (FP) of borehole AL1_15 on the Alazeya River, and coastal brackish permafrost (BP) overlying marine permafrost (MP) of borehole CH1_17 on the East Siberian Sea coast. To avoid the limited view provided with culturing work, we used 16S rRNA gene sequencing to show that the biodiversity decreased dramatically with permafrost age. Nonmetric multidimensional scaling (NMDS) analysis placed the samples into three groups: FP and BP together (10–100 kyr old), MP (105–120 kyr old), and FP (> 900 kyr old). Younger FP/BP deposits were distinguished by the presence of Acidobacteriota, Bacteroidota, Chloroflexota_A, and Gemmatimonadota, older FP deposits had a higher proportion of Gammaproteobacteria, and older MP deposits had much more uncultured groups within Asgardarchaeota, Crenarchaeota, Chloroflexota, Patescibacteria, and unassigned archaea. The 60 recovered metagenome-assembled genomes and un-binned metagenomic assemblies suggested that despite the large taxonomic differences between samples, they all had a wide range of taxa capable of fermentation coupled to nitrate utilization, with the exception of sulfur reduction present only in old MP deposits.

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Section: Sample Description and Geochemical Analysismentioning

confidence: 99%

Microbial life in 25-m-deep boreholes in ancient permafrost illuminated by metagenomics

Almatari

Cyr

et al. 2023

Environmental Microbiome

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“…In addition to the techniques just illustrated (see also [81][82][83][84]176]), many more instrumental and probe schemes to access overtones were reported in the literature, leading to some beautiful results. One can highlight LIF and stimulated emission pumping involving an intermediate, excited electronic state, as performed by Field and co-workers [177].…”

Section: Cw-crds Based Overtone Spectramentioning

confidence: 99%

“…In addition to supporting reaction dynamics [65], including isomerization processes [66][67][68][69][70], overtone excitation is recognised as driving some of the atmospheric chemistry [71][72][73] and as controlling bond selected chemistry [74,75]. The investigation of overtones generated the local mode theory [76][77][78], the polyad concept [79,80], and, as already suggested, stimulated the development of detection capabilities [81][82][83][84].…”

Section: Introductionmentioning

confidence: 99%

Overtone spectroscopy of molecular complexes containing small polyatomic molecules

Herman

Földes

Didriche

et al. 2016

International Reviews in Physical Chemistry

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The literature on the high-resolution spectroscopic investigation of molecular complexes containing small polyatomic species excited in their vibrational overtones is reviewed. They turn out to be complexes containing acetylene, ammonia and water, mainly excited in their 2CH, 2NH and 2OH vibrations, respectively. The majority of results published on these systems was obtained using an instrumental set-up based on cw-cavity ring-down spectroscopy, built in the 'Laboratoire de Chimie quantique et Photophysique' at the 'Université libre de Bruxelles' (CQP/ULB) and named FANTASIO+, which is described. It allowed retrieving upper state vibrational predissociation lifetimes, which are highlighted together with more results. The sequence of experiments at CQP/ULB prior and along the line of those supporting the investigation of molecular complexes is briefly illustrated.

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“…Chen et al used the CRDS technology to measure methane and its isotopes. e CRDS spectrum analyzer of their work will be used for future Mars surface missions, since it is capable of meeting the detecting requirements of the Mars atmosphere relying on its extremely high sensitivity [4]. Chen et al used the CRDS technology to detect HCN in oral exhalation, of which the sample concentration ranged from 0.9 to 10.9 ppb [5].…”

Section: Introductionmentioning

confidence: 99%

Differential Measurement for Cavity Ring-Down Spectroscopy with Dynamic Allan Variance

Wang

et al. 2020

Journal of Spectroscopy

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The method of dynamic Allan variance (DAVAR) is used to analyze the time-varying characteristics of a nonstationary signal and is thus incorporated to evaluate the random error in the cavity ring-down spectroscopy (CRDS) experiments. With the numerical simulation of the influence of instabilities of sudden, slow, or periodic changes on the measurement accuracy in the ring-down process, DAVAR is proved to be an effective way to evaluate random error characteristics in an interfering environment. In order to minimize influences of time-varying noises in CRDS, a practical differential measurement method is proposed, in which wavelength modulation is applied to detect the ring-down times at the absorption peak and the nonabsorption peak in a time-division manner. The validity of the differential measurement is proved with its ability to compensate the influence of the environment changes and improves the accuracy from 0.181 ppm to 0.00914 ppm. The differential measurement method can be used to correct the time-varying error in real time and is helpful to improve the environmental adaptability of the CRDS instrument.

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Near infrared cavity ring-down spectroscopy for isotopic analyses of CH4 on future Martian surface missions

Cited by 28 publications

References 28 publications

Microbial life in 25-m-deep boreholes in ancient permafrost illuminated by metagenomics

Microbial life in 25-m-deep boreholes in ancient permafrost illuminated by metagenomics

Overtone spectroscopy of molecular complexes containing small polyatomic molecules

Differential Measurement for Cavity Ring-Down Spectroscopy with Dynamic Allan Variance

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