Range-resolved detection of boundary layer stable water vapor isotopologues using a ground-based 1.98 µm differential absorption LIDAR - ONERA - Office national d'études et de recherches aérospatiales Access content directly
Journal Articles (Review Article) Optics Express Year : 2022

Range-resolved detection of boundary layer stable water vapor isotopologues using a ground-based 1.98 µm differential absorption LIDAR

Cyrille Flamant

Abstract

This paper presents a first demonstration of range-resolved differential absorption LIDAR (DIAL) measurements of the water vapor main isotopologue H 2 16 O and the less abundant semi-heavy water isotopologue HD 16 O with the aim of determining the isotopic ratio. The presented Water Vapor and Isotope Lidar (WaVIL) instrument is based on a parametric laser source emitting nanosecond pulses at 1.98 µm and a direct-detection receiver utilizing a commercial InGaAs PIN photodiode. Vertical profiles of H 2 16 O and HD 16 O were acquired in the planetary boundary layer in the suburban Paris region up to a range of 1.5 km. For time averaging over 25 min, the achieved precision in the retrieved water vapor mixing ratio is 0.1 g kg −1 (2.5% relative error) at 0.4 km above ground level (a.g.l.) and 0.6 g kg −1 (20%) at 1 km a.g.l. for 150 m range bins along the LIDAR line of sight. For HD 16 O, weaker absorption has to be balanced with coarser vertical resolution (600 m range bins) in order to achieve similar relative precision. From the DIAL measurements of H 2 16 O and HD 16 O, the isotopic abundance δD was estimated as −51%₀ at 0.4 km above the ground and −119%₀ in the upper part of the boundary layer at 1.3 km a.g.l. Random and systematic errors are discussed in the form of an error budget, which shows that further instrumental improvements are required on the challenging path towards DIAL-profiling of the isotopic abundance with range resolution and precision suitable for water cycle studies.
Fichier principal
Vignette du fichier
oe-30-26-47199.pdf (4.5 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

insu-03908665 , version 1 (20-12-2022)

Licence

Identifiers

Cite

Jonas Hamperl, Jean-Baptiste Dherbecourt, Myriam Raybaut, Julien Totems, Patrick Chazette, et al.. Range-resolved detection of boundary layer stable water vapor isotopologues using a ground-based 1.98 µm differential absorption LIDAR. Optics Express, 2022, 30 (26), pp.47199-47215. ⟨10.1364/oe.472451⟩. ⟨insu-03908665⟩
209 View
57 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More