Publications from ATMOS-group
2022
D. Cholleton, E. Bialic, A. Dumas, P. Kaluzny, P. Rairoux and A. Miffre, Atmos. Meas. Tech. (2022).
Pollen is nowadays recognized as one of the main atmospheric particles affecting public human health as well as the Earth’s climate. In this context, an important issue concerns our ability to detect and differentiate among the existing
pollen taxa. In this paper, the potential differences that may exist in light scattering by four of the most common pollen taxa, namely ragweed, birch, pine and ash, are analysed in the framework of the scattering matrix formalism at
two wavelengths simultaneously (532 and 1064 nm). Interestingly, our laboratory experimental error bars are precise enough to show that ...
2021
Decrease in sulfate aerosol light backscattering due to reactive uptake of epoxydiols,
Dubois, C., D. Cholleton, R. Gemayel, Y. Chen, J.D. Surratt, C. George, P. Rairoux, A. Miffre and M. Riva, Phys. Chem. Chem. Phys, (2021).
Sulfate aerosol is responsible for a net cooling of the Earth's atmosphere due to its ability to backscatter light. Through atmospheric multiphase chemistry, it reacts with isoprene epoxydiols leading to the formation of aerosol and organic compounds, including organosulfates and high-molecular weight compounds. In this study, we evaluate how sulfate aerosol light backscattering is modified in the presence of such organic compounds. Our laboratory experiments show that reactive uptake of isoprene epoxydiols on sulfate aerosol is responsible for a decrease in light backscattering compared to pure inorganic sulfate particles of up to – 12% at 355 nm wavelength and – 21% at 532 nm wavelength...
Paulien, L., R. Ceolato, F. Foissard, P. Rairoux and A. Miffre, J. Quant. Spec. Rad. Transf., Vol. 254, 107223 (2021).
In this paper, a controlled-laboratory experiment is carried out to evaluate the lidar depolarization ratio of freshly emitted soot aggregates in the exact backward scattering direction at 180.0°. The experiment is performed at two wavelengths simultaneously, namely 355 and 532 nm, often used in polarimetric lidar remote sensing. The soot aggregates are generated from a kerosene JET A-1 pool fire in laboratory ambient air and microscopic images confirm the fractal morphology of generated soot aggregates. Then, the Superposition T-Matrix (STM) method is applied to numerically simulate the soot aggregates backscattering properties for different soot particles refractive indices, monomer radii and monomer numbers...
2020
Renard, J.B., G. Berthet, A-C Levasseur-Regourd, S. Beresnev, A. Miffre and P. Rairoux, D. Vignelles, F. Jégou, Atmosphere, (2020).
While water and sulfuric acid droplets are the main component of stratospheric aerosols, measurements performed for about 30 years have shown that non-sulfate particles (NSPs) are also present. Such particles, released from the Earth mainly through volcanic eruptions, pollution or biomass burning, or coming from space, present a wide variety of compositions, sizes, and shapes. To better understand the origin of NSPs, we have performed measurements...
Laboratory evaluation of the (VIS, IR) scattering matrix of complex-shaped ragweed pollen particles
Cholleton, D., P. Rairoux and A. Miffre, J. Quant. Spec. Rad. Transf., Vol. 254, 107223 (2020).
Ragweed or Ambrosia artemisiifolia pollen is an important atmospheric constituent affecting the Earth's climate and public health. The literature on light scattering by pollens embedded in ambient air is however rather sparse: polarization measurements are limited to the sole depolarization ratio and pollens are beyond the reach of numerically exact light scattering models mainly due to their tens of micrometre size. Also, ragweed pollen presents a very complex shape,...
Miffre, A., D. Cholleton, and P. Rairoux, Optics Letters, 45, 5, 1084-1087, (2020).
In this Letter, we exploit the polarization property of light to investigate the Ångström exponent describing the wavelength dependence of optical backscatter between two wavelengths. Where previous interpretation of Ångström exponent was that of a particle size indicator, the use of light polarization makes it possible to investigate the Ångström exponent dependence on the particle shape by separately retrieving the backscattering Ångström exponent of the spherical (s) and non-spherical (ns) particles contained in an atmospheric particle mixture (p) = {s, ns}...
2019
Remote Sensing Observation of New Particle Formation Events with a (UV, VIS) Polarization Lidar
Miffre, A., D. Cholleton, T. Mehri and P. Rairoux, Remote Sensing, 11(15), 1761, (2019).
Observations of new particle formation events in free troposphere are rather seldom and limited in time and space, mainly due to the complexity and the cost of the required on-board instrumentation for airplane field campaigns. In this paper, a calibrated (UV, VIS) polarization elastic lidar (2β + 2δ) is used to remotely sense new particle formation events in the free troposphere in the presence of mineral dust particles...
Miffre, A., D. Cholleton and P. Rairoux, J. Quant. Spec. Rad. Transf. , 222, 45-59, (2019).
In this paper, the scattering matrix elements of an ensemble of mineral dust particles are for the first time evaluated in laboratory for scattering angles ranging from 176.0° to the π-backscattering angle of 180.0° with a high angular resolution of 0.4° and compared with the outputs of T-matrix numerical code. Elastic light scattering is addressed at near and exact backscattering angles with a newly-built laboratory polarimeter, validated on spherical particles following the Lorenz–Mie theory. The ratios fij(θ) = Fij(θ)/F11(θ) of the scattering matrix elements of mineral dust particles are then precisely evaluated in laboratory from 176.0° up to 180.0° with a 0.4° angular resolution ...
2018
Remote sensing of methane with OSAS-lidar on the 2m3 band Q-branch: Experimental proof,
Galtier, S., C. Anselmo, JY Welschinger, JD Sivignon, JP Cariou, A. Miffre and P. Rairoux, Journal of Molecular Spectroscopy 348 (2018) 130–136.
Optical sensors based on absorption spectroscopy play a central role in the detection and monitoring of atmospheric trace gases. We here present for the first time the experimental demonstration of OSAS-Lidar on the remote sensing of CH4 in the atmosphere. This new methodology, the OSAS-Lidar, couples the Optical Similitude Absorption Spectroscopy (OSAS) methodology with a light detection and ranging device. It is based on the differential absorption of spectrally integrated signals following Beer Lambert-Bouguer law, which are range-resolved...
2017
Mehri, T., O. Kemppinen, G. David, H. Lindvist, J. Tyynelä, T. Nousiainen, P. Rairoux and A. Miffre, Atmospheric Research, 203, 44-61 (2017).
Our understanding of the contribution of mineral dust to the Earth's radiative budget is limited by the complexity of these particles, which present a wide range of sizes, are highly-irregularly shaped, and are present in the atmosphere in the form of particle mixtures. To address the spatial distribution of mineral dust and atmospheric dust mass concentrations, polarization lidars are nowadays frequently used, with partitioning algorithms allowing to discern the contribution of mineral dust in two or three-component particle external mixtures. In this paper, we investigate the dependence of the retrieved dust backscattering (βd) vertical profiles with the dust particle size and shape...
2016
Anselmo, C., JY Welschinger, JP Cariou, A. Miffre and P. Rairoux, Optics Express 24, 12588-12599 (2016).
We propose a new methodology to measure gas concentration by light-absorption spectroscopy when the light source spectrum is larger than the spectral width of one or several molecular gas absorption lines. We named it optical similitude absorption spectroscopy (OSAS), as the gas concentration is derived from a similitude between the light source and the target gas spectra. The main OSAS-novelty lies in the development of a robust inversion methodology, based on the Newton-Raphson algorithm, which allows retrieving the target gas concentration from spectrally-integrated differential light-absorption measurements...
UV-VIS depolarization from Arizona Test Dust particles at exact backscattering angle,
Miffre, A., T. Mehri, M. Francis and P. Rairoux, J. Quant. Spec. Rad. Transf. , 169, 79-90, (2016).
In this paper, a controlled laboratory experiment is performed to accurately evaluate the depolarization from mineral dust particles in the exact backward scattering direction (ϴ=180.0±0.2°). The experiment is carried out at two wavelengths simultaneously (λ=355 nm, λ=532 nm), on a determined size and shape distribution of Arizona Test Dust (ATD) particles, used as a proxy for mineral dust particles. After validating the set-up on spherical water droplets, two determined ATD-particle size distributions, representative of mineral dust after long-range transport, are generated to accurately retrieve the UV–VIS depolarization from ATD-particles at exact backscattering angle, which is new. The measured depolarization reaches at most 37.5% at λ=355 nm (35.5% at λ=532 nm), and depends on the particle size distribution. Moreover, these laboratory findings agree with T-matrix numerical simulations, at least for...
2015
Lidar remote sensing of Light-Induced-Incandescence in the atmosphere,
Miffre, A., C. Anselmo, S. Geffroy, E. Frejafon and P. Rairoux, Optics Express, 23, 3, 2347-2360, (2015).
Carbon aerosol is now recognized as a major uncertainty on climate change and public health, and specific instruments are required to address the time and space evolution of this aerosol, which efficiently absorbs light. In this paper, we report an experiment, based on coupling lidar remote sensing with Laser-Induced-Incandescence (LII), which allows, in agreement with Planck’s law, to retrieve the vertical profile of very low thermal radiation emitted by light-absorbing particles in an urban atmosphere over several hundred meters altitude...
2014
UV polarization lidar for remote sensing new particles formation in the atmosphere,
David, G., B. Thomas, Y. Dupart, B. D'Anna, C. George, A. Miffre and P. Rairoux, Optics Express, 22, S3, A1009-A1022 (2014). Article sélectionné par l'Optical Society of America (OSA) : Spotlights on Optics, Juin 2014
Understanding new particles formation in the free troposphere is key for air quality and climate change, but requires accurate observation tools. Here, we discuss on the optical requirements ensuring a backscattering device, such as a lidar, to remotely observe nucleation events promoted by nonspherical desert dust or volcanic ash particles. By applying the Mie theory and the T-matrix code, we numerically simulated the backscattering coefficient of spherical freshly nucleated particles and nonspherical particles. We hence showed that, to remotely observe such nucleation events with an elastic lidar device, it should operate in the UV spectral range and be polarization-resolved....
2013
G. David, B. Thomas, E. Coillet, A. Miffre and P. Rairoux, Polarization-resolved backscattering of light by an ensemble of particles in air, Optics Express, 21, 16, pp. 18624-18639 (2013)(2013).
G. David, B. Thomas, T. Nousiainen, A. Miffre and P. Rairoux, Retrieving volcanic, desert dust, and sea-salt particle properties from two/three-component particle mixtures after long-range transport using UV-VIS polarization Lidar and T-matrix, Atmospheric Chemistry and Physics, 13, 6757-6756, (2013).
B. Thomas, G. David, C. Anselmo, E. Coillet, K. Rieth, A. Miffre and P. Rairoux, Remote sensing of methane with broadband laser and optical correlation spectroscopy on the Q-branch of the 2ν3 band, J. Mol. Spec., Special Issue on methane, (2013).
B. Thomas, G. David, C. Anselmo, JP Cariou, A. Miffre and P. Rairoux, Remote sensing of atmospheric gases with optical correlation spectroscopy and lidar: first experimental results on water vapor, Applied Phys B (2013).
2012
Y. Dupart, S. King, B. Nekat, A. Novak, A. Widensohler, H. Hermann, G. David, B. Thomas, A. Miffre, P. Rairoux, B. D’Anna and C. George, Mineral dust photochemistry induces nucleation events in the presence of SO2, Proc. Nat. Acad. Sc. United States, 109, No. 51, (2012). Lien
B. Thomas, A. Miffre, G. David, J.P. Cariou and P. Rairoux, Remote sensing of trace gases with optical correlation spectroscopy and Lidar : Theoretical and numerical approach, Applied Phys B, 108, 689-702, (2012).
G. David, A. Miffre, B. Thomas and P. Rairoux, Sensitive and accurate dual wavelength UV-VIS polarization detector for optical remote sensing of tropospheric aerosols, Applied Phys B, 108, 197-216, (2012).
A. Miffre, G. David, B. Thomas, M. Abou Chacra and P. Rairoux, Interpretation of accurate UV-Polarization Lidar measurements : Application to volcanic ash number concentration retrieval, J. of Atmos. and Ocean. Tech. 29, 558-568, (2012).
2011
A. Miffre, G. David, B. Thomas, P. Rairoux, A.M. Fjaeraa, N.I. Kristiansen, A. Stohl, Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements, Special Issue on the Eyjafjalljökull volcano, Atmos. Env. 48, pp 76–84, (2011).
A. Miffre, G. David, B. Thomas, P. Rairoux, Atmospheric non-spherical particles optical properties from UV-polarization lidar and scattering matrix, Geophys. Res. Lett., 38, L16804, (2011).
A. Miffre, M. Abou Chacra, S. Geffroy, P. Rairoux, L. Soulhac, R. Perkins, Aerosol Load Study in Urban Area by Lidar and Numerical Model, Atmos. Env. 44, Issue 9, 1152 - 1161, (2010).