Concentrations of hydrogen chloride and hydrogen fluoride measured during the MAP/GLOBUS campaign of September 1983

Zander, Rodolphe; Roland, G.; Delbouille, L.; Sauval, A. J.; Marché, P.; Karcher, F.; Amoudei, M.; Dufour, Bruno

doi:10.1016/0032-0633(87)90133-4

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…Since then, a large number of remote observations have been undertaken from balloons, airplane, and from the ground; an excellent bibliographic review can be found in Mankin and Coffey (1983). More recent results obtained during intercomparison campaigns by balloon and from the ground have been published, respectively, by Farmer et al (1987) and by Zander et al (1987a).…”

Section: Introductionmentioning

confidence: 98%

Column abundance and the long-term trend of hydrogen chloride (HCl) above the Jungfraujoch Station

et al. 1987

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The integrated column amount of hydrogen chloride has been monitored above the International Scientific Station of the Jungfraujoch (Switzerland) during the last 8 years. The results deduced from solar absorption measurements near 3.42 gm indicate a secular trend equivalent to (0.75 + 0.2) % increase per year since 1978, superimposed on a significant short-term variability which can be partly attributed to the tropospheric component of the total HCI burden. Based on an intensified set of measurements carried out over the last three years, a seasonal component in the total content of HCI has been established for the first time, showing a minimum occuring in early winter and a maximum during the spring.

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Section: Introductionmentioning

confidence: 98%

Column abundance and the long-term trend of hydrogen chloride (HCl) above the Jungfraujoch Station

et al. 1987

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“…Mankin and Coffey (1983) have provided a synthesis of results accumulated up to 1982, while more recent intercomparison investigations have been reported by Mankin and Coffey (1987) and by Zander et al (1987a). With the exception of one profile determined from in-situ sampling by filter collection (Mroz et al, 1977) and a few recent far-infrared emission measurements (Traub and Chance, 1981), most of the database regarding the content and distribution of telluric hydrogen fluoride has come from infrared solar observations near 2.45 ~tm, where lines belonging to the fundamental band of HF appear unambiguously in absorption.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the integrated column of hydrogen fluoride above the Jungfraujoch Station since 1977 ? the HF/HCl column ratio

et al. 1987

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The amount of hydrogen fluoride (HF) above the International Scientific Station of the Jungfraujoch (Switzerland) has been monitored during the last 8 years. The results deduced spectroscopically from solar IR absorption measurements near 2.48 tim indicate a cumulative trend equivalent to (8.5 _+ 1)% increase per year, as well as short-term variability which appears to be strongly correlated with meridional circulation patterns during the February-April months. Based on intensified measurements made over the last three years, it is found that the integrated content of HF undergoes a seasonal change with a minimum occurring in the fall. The HF/HCI ratio derived from simultaneous HF and HCI measurements was found equal to 0.15 during the period 1977-79, and 0.24 for the 1983-85 timespan.

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“…Their measurements near but not downwind of the refinery reported fluoride concentrations of < 1 µg m −3 , or a DMF of order 10 to 100 parts per trillion (ppt). Spectroscopic measurements over Antarctica (Toon et al, 1989) and Switzerland (Zander et al, 1987) found upper tropospheric HF DMFs of 1 to 10 ppt were consistent with solar-viewing spectra.…”

Section: Hfmentioning

confidence: 53%

“…For our purposes, we assume that the tropospheric DMF of HF is negligible compared to the stratospheric component, and so imposed a small but non-zero DMF of 0.1 ppt. This is less than the previous measurements (Okita et al, 1974;Zander et al, 1987;Toon et al, 1989), but the impact on HF retrievals should be small given that TCCON HF averaging kernels are usually < 0.5 below 200 hPa.…”

Section: Hfmentioning

confidence: 69%

A new algorithm to generate a priori trace gas profiles for the GGG2020 retrieval algorithm

Laughner

Roche²,

Kiel³

et al. 2022

Preprint

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Abstract. Optimal estimation retrievals of trace gas total columns require prior vertical profiles of the gases retrieved to drive the forward model and ensure the retrieval problem is mathematically well-posed. For well-mixed gases, it is possible to derive accurate prior profiles using an algorithm that accounts for general patterns of atmospheric transport coupled with measured time series of the gases in questions. Here we describe the algorithm used to generate the prior profiles for GGG2020, a new version of the GGG retrieval that is used to analyze spectra from solar-viewing Fourier transform spectrometers, including the Total Carbon Column Observing Network (TCCON). A particular focus of this work is improving the description of CO2, CH4, N2O, HF, and CO in the stratosphere. We show that the revised priors agree well with independent in situ and space-based measurements and improve the total column retrievals.

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Concentrations of hydrogen chloride and hydrogen fluoride measured during the MAP/GLOBUS campaign of September 1983

Cited by 9 publications

References 9 publications

Column abundance and the long-term trend of hydrogen chloride (HCl) above the Jungfraujoch Station

Column abundance and the long-term trend of hydrogen chloride (HCl) above the Jungfraujoch Station

Monitoring of the integrated column of hydrogen fluoride above the Jungfraujoch Station since 1977 ? the HF/HCl column ratio

A new algorithm to generate a priori trace gas profiles for the GGG2020 retrieval algorithm

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