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26 results on '"Riviere, Emmanuel"'

8. Pico-Light H2O: Intercomparison of in situ water vapour measurements during the AsA 2022 campaign.

Author

Ghysels, Mélanie, Durry, Georges, Amarouche, Nadir, Hurst, Dale, Hall, Emrys, Kensy Xiong, Dupont, Jean-Charles, Samake, Jean-Christophe, Frérot, Fabien, Bejjani, Raghed, and Riviere, Emmanuel D.

Subjects
WATER vapor, ATMOSPHERIC water vapor measurement, HUMIDITY, HYGROMETERS, RESEARCH teams, TROPOSPHERE, STRATOSPHERE
Abstract

The mid-infrared lightweight stratospheric hygrometer, "Pico-Light H2O", the successor of Pico-SDLA H2O, is presented and its performances are evaluated during the AsA 2022 balloon-borne intercomparison campaign conducted at CNES Aire-sur-l'Adour (AsA) balloon launch facility and the Aeroclub d'Aire-sur-l'Adour. The Pico-Light instrument primarily been developed for sounding of the upper troposphere and stratosphere. Though, during the AsA 2022 campaign we expand the range of comparison including the lower troposphere additionally. Three different types of hygrometers and two models of radiosonde were flown, operated by the French Space Agency (CNES) and the NOAA Global Monitoring Laboratory (GML) scientific teams: Pico-Light H2O, the NOAA Frost Point Hygrometer (FPH), the micro hygrometer (in an early phase of development), M20 and iMet-4 sondes. In this frame, we intend to validate measurements of Pico-Light H2O through a first intercomparison with the NOAA FPH instrument. The in situ monitoring of water vapour in the UT-LS keeps being very challenging from an instrumental point of view because of the very small amounts of water vapour to be measured in these regions of the atmosphere. Between the lapse rate tropopause (11 to 12.3 km) and 20 km, the mean relative difference between water vapour mixing ratio measurements by Pico-Light H2O and NOAA FPH was (4.2 ± 7.7) %, mean tropospheric difference is was (3.84 ± 23.64)%, with differences depending on the altitude range considered. In the troposphere, relative humidity over water (RH) comparisons leads to an agreement between both Pico-Light and NOAA FPH of -0.2% on average, with excursions of about 30% RH due to moisture variability. Expanding the comparison to meteorological sondes, the iMet-4 sondes agree well with both Pico-Light and FPH between ground and 7.5 km (within ± 3% RH) and so does for M20 sondes, up to 13 km, which are wet biased by 3% RH and dry biased by 20% in case of saturation. [ABSTRACT FROM AUTHOR]

Published
2023
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14. Influence of socioeconomic deprivation on the relation between air pollution and (beta)-agonist sales for asthma

Author

Laurent, Olivier, Pedrono, Gaelle, Filleul, Laurent, Segala, Claire, Lefranc, Agnes, Schillinger, Charles, Riviere, Emmanuel, and Bard, Denis

Subjects
Air pollution -- Health aspects, Air pollution -- Demographic aspects, Asthma -- Demographic aspects, Asthma -- Prognosis, Asthma -- Risk factors, Social economics -- Influence, Social economics -- Health aspects, Health
Published
2009

15. Balancing access to BPaLM regimens and risk of resistance

Author

Van Rie, Annelies, Walker, Timothy, de Jong, Bouke, Rupasinghe, Praharshinie, Rivière, Emmanuel, Dartois, Véronique, Sonnenkalb, Lindsay, Machado, Diana, Gagneux, Sébastien, Supply, Philip, Dreyer, Viola, Niemann, Stefan, Goig, Galo, Meehan, Conor, Tagliani, Elisa, and Cirillo, Daniela Maria

Published
2022
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18. Modélisation et effets sanitaires: Pollution atmosphérique sur le territoire français : modélisation et effets sanitaires (PATer)

Author

Riviere, Emmanuel, Lepeule, Johanna, Agence de surveillance de la qualité de l’air (ASPA), Institute for Advanced Biosciences / Institut pour l'Avancée des Biosciences (Grenoble) (IAB), Centre Hospitalier Universitaire [Grenoble] (CHU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Etablissement français du sang - Auvergne-Rhône-Alpes (EFS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and PNR EST

Subjects
perturbateur endocrinien, [SDV.EE.SANT]Life Sciences [q-bio]/Ecology, environment/Health, exposition maternelle, cohorte, femme enceinte, pollution atmosphérique, polluant, prématurité, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, échange fœtomaternel, fœtus, modèle
Abstract

National audience; Depuis les années 1990, de nombreuses études épidémiologiques ont montré des associations entre les niveaux de pollution atmosphérique et différents effets sanitaires comme les allergies respiratoires, les maladies cardio-vasculaires, et des événements liés à la santé reproductive. La cohorte ELFE (Étude Longitudinale Française depuis l’Enfance) permet d’étudier notamment les effets des polluants atmosphériques sur la prématurité. La convergence des progrès réalisés pour l’évaluation des polluants dans l’air, des méthodes et des résultats des études épidémiologiques autorise pour la première fois en France, la réalisation d’un maillage national à haute résolution spatiale qui permettra d’étudier de manière fine les relations entre les niveaux de pollution et les issues de grossesse, mais également d’autres événements de santé.

Published
2016

19. Modélisation et effets sanitaires

Author

Riviere, Emmanuel, Lepeule, Johanna, and Ruaux, Nathalie

Subjects
perturbateur endocrinien, exposition maternelle, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, femme enceinte, cohorte, pollution atmosphérique, polluant, [SDV.EE.SANT] Life Sciences [q-bio]/Ecology, environment/Health, prématurité, échange fœtomaternel, fœtus, modèle
Abstract

Depuis les années 1990, de nombreuses études épidémiologiques ont montré des associations entre les niveaux de pollution atmosphérique et différents effets sanitaires comme les allergies respiratoires, les maladies cardio-vasculaires, et des événements liés à la santé reproductive. La cohorte ELFE (Étude Longitudinale Française depuis l’Enfance) permet d’étudier notamment les effets des polluants atmosphériques sur la prématurité. La convergence des progrès réalisés pour l’évaluation des polluants dans l’air, des méthodes et des résultats des études épidémiologiques autorise pour la première fois en France, la réalisation d’un maillage national à haute résolution spatiale qui permettra d’étudier de manière fine les relations entre les niveaux de pollution et les issues de grossesse, mais également d’autres événements de santé.

Published
2016

20. Targeted therapy for localized non-small-cell lung cancer: a review

Author

Paleiron,Nicolas, Bylicki,Olivier, Andre,Michel, Riviere,Emmanuel, Grassin,Frederic, Robinet,Gilles, Chouaid,Christos, Paleiron,Nicolas, Bylicki,Olivier, Andre,Michel, Riviere,Emmanuel, Grassin,Frederic, Robinet,Gilles, and Chouaid,Christos

Abstract

Nicolas Paleiron,1 Olivier Bylicki,2 Michel André,1 Emilie Rivière,1 Frederic Grassin,1 Gilles Robinet,3 Christos Chouaïd4 On behalf of the GFPC Group 1Chest Department, HIA Clermont Tonnerre, Brest, 2Chest Department, HIA Percy, Clamart, 3Chest Department, CHU de Brest, Brest, 4GRC OncoEst, Université Paris XII, Paris, France Abstract: Targeted therapies have markedly improved the management of patients with advanced non-small-cell lung cancer (NSCLC), but their efficacy in localized NSCLC is less well established. The aim of this review is to analyze trials of targeted therapies in localized NSCLC. In patients with wild-type EGFR, tyrosine kinase inhibitors have shown no efficacy in Phase III trials. Few data are available for EGFR-mutated localized NSCLC, as routine biological profiling is not recommended. Available studies are small, often retrospectives, and/or conducted in a single-center making it difficult to draw firm conclusions. Ongoing prospective Phase III trials are comparing adjuvant tyrosine kinase inhibitor administration versus adjuvant chemotherapy. By analogy with the indication of bevacizumab in advanced NSCLC, use of antiangiogenic agents in the perioperative setting is currently restricted to nonsquamous NSCLC. Several trials of adjuvant or neoadjuvant bevacizumab are planned or ongoing, but for the moment there is no evidence of efficacy. Data on perioperative use of biomarkers in early-stage NSCLC come mainly from small, retrospective, uncontrolled studies. Assessment of customized adjuvant or neoadjuvant therapy in localized NSCLC (with or without oncogenic driver mutations) is a major challenge. Keywords: targeted therapy, non-small-cell lung cancer, adjuvant, neo-adjuvant, surgery&nbsp

Published
2016

21. Small balloon flights for investigating the impact of convective overshooting on the tropical lower stratosphere

Author

Pommereau, Jean-Pierre, Riviere, Emmanuel, Khaykin, Sergey, Held, Gerhar, STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Groupe de spectrométrie moléculaire et atmosphérique (GSMA), Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), and Cardon, Catherine

Subjects
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
Abstract

Thunderstorm convective overshooting over tropical land can reach an altitude of 20-21 km (Pommereau et al, Cospar 2018, Id 15676). For better understanding the process and the impact on the lower stratosphere, a small balloon flight program combining frequent flights of plastic and large rubber balloons next to thunderstorms has been carried in S-E Brazil in the frame of a French TROPICO project. Given the goal flying as close as possible from thunderstorms and ATC and safety requirements at landing, a specific control procedure was developed based on C-band radar observations and use of light-weight Iridium telemetry/remote control whose data were made available in real time to ATC by Internet for following the flight. A total of 37 flights have been carried out within two 3 weeks campaigns (20 in March 2012 and 17 in February 2013) of 3-40 kg payloads, among which FLASH Lyman alpha stratospheric hygrometers, PicoSDLA water vapor, N2O and CH4 diode laser sensors and COBALD cloud and aerosols detectors, operated and recovered in safe conditions. Altogether those balloon data, complemented by a variety of ground-based measurements of cloud altitude, atmospheric optical thickness and 4 radiosondes/day, allow confirming the stronger convective intensity over land in the southern tropics. An promising approach for further investigating the possible differences with other continents, i.e. Central Africa and Northern Australia, would be to carry similar measurements from long duration circumnavigating Infra Montgolfier, when their flights will be newly authorized. Details on technical aspects, payloads and procedures applied for carrying safe balloon flights in agreement with Brazilian authorities will be presented.

Published
2014

22. Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations

Author

Khaykin, Sergey M., primary, Pommereau, Jean-Pierre, additional, Riviere, Emmanuel D., additional, Held, Gerhard, additional, Ploeger, Felix, additional, Ghysels, Melanie, additional, Amarouche, Nadir, additional, Vernier, Jean-Paul, additional, Wienhold, Frank G., additional, and Ionov, Dmitry, additional

Published
2016
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25. Ambient Air Pollution, Social Inequalities and Asthma Exacerbation in Greater Strasbourg (France) Metropolitan Area: the PAISA Study

Author

Bard, Denis, Laurent, Olivier, Havard, Sabrina, Deguen, Séverine, Pedrono, Gaelle, Filleul, Laurent, Segala, Claire, Lefranc, Agnes, Schillinger, Charles, Riviere, Emmanuel, École des Hautes Études en Santé Publique [EHESP] (EHESP), Laboratoire Magmas et Volcans (LMV), Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'étude et de recherche en environnement et santé (LERES), Institut de recherche en santé, environnement et travail (Irset), Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de la Santé et de la Recherche Médicale (INSERM)-École des Hautes Études en Santé Publique [EHESP] (EHESP)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université d'Angers (UA), Département Méthodes quantitatives en santé publique (METIS), SEPIA-Santé, Cellule Interrégionale d'Epidémiologie (CIRE), Cellule Interregionale d'Epidemiologie (CIRE), SEPIA Santé, Association pour la Surveillance et l'Etude la Pollution Atmosphérique en Alsace, Groupe de spectrométrie moléculaire et atmosphérique (GSMA), Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), Vanda Villanyi, Jonchère, Laurent, Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), and Université d'Angers (UA)-Université de Rennes (UR)-École des Hautes Études en Santé Publique [EHESP] (EHESP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )

Subjects
[SDV] Life Sciences [q-bio], [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, immune system diseases, Social Inequalities, Air Pollution, Strasbourg, [SDV]Life Sciences [q-bio], PAISA Study, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, Asthma, respiratory tract diseases
Abstract

International audience; The socio-economic status (SES) of populations has an influence on the incidence or mortality rates of numerous health outcomes, among which respiratory diseases (Prescott et al., 2003; Ellison-Loschmann et al., 2007). Considering asthma, the possible contribution of SES to overall prevalence –regardless of asthma severity-, remains controversial in industrialized countries. Several studies indicate that allergic asthma is more prevalent in more well-off populations whereas the non-allergic forms of asthma are more common in the deprived ones (Cesaroni et al., 2003; Blanc et al., 2006). On the other hand, severe asthma whatever its etiology appears to be more frequent in the latter populations, as compared to the more affluent (Basagana et al., 2004). Risk factors for exacerbations (e.g., passive smoking (Wright Subramanian, 2007), psychosocial stress (Gold & Wright, 2005), cockroach allergens (Kitch et al., 2000), and suboptimal compliance with anti-inflammatory medication (Gottlieb et al., 1995)) are generally more common among people with asthma and low SES than their better-off counterparts. These observations support the hypothesis that some factors more present in deprived populations contribute to asthma exacerbation (Mielck et al., 1996).

Published
2010

26. Intercomparison of in situ water vapor balloon-borne measurements from Pico-SDLA H2O and FLASH-B in the tropical UTLS.

Author

Ghysels, Mélanie, Riviere, Emmanuel D., Khaykin, Sergey, Stoeffler, Clara, Amarouche, Nadir, Pommereau, Jean-Pierre, Held, Gerhard, and Durry, Georges

Subjects
*WATER vapor, *ATMOSPHERIC spectra, *REMOTE sensing of the atmosphere
Abstract

In this paper we compare water vapor mixing ratio measurements from two quasi-parallel flights of the Pico-SDLA H2O and FLASH-B hygrometers. The measurements were made on 10 February 2013 and 13 March 2012, respectively, in the tropics near Bauru, São Paulo state, Brazil during an intense convective period. Both flights were performed as part of a French scientific project, TRO-Pico, to study the impact of the deep-convection overshoot on the water budget. Only a few instruments that permit the frequent sounding of stratospheric water vapor can be flown within smallvolume weather balloons. Technical difficulties preclude the accurate measurement of stratospheric water vapor with conventional in situ techniques. The instruments described here are simple and lightweight, which permits their low-cost deployment by non-specialists aboard a small weather balloon. We obtain mixing ratio retrievals which agree above the coldpoint tropopause to within 1.9 and 0.5% for the first and second flights, respectively. This level of agreement for balloonborne measured stratospheric water mixing ratio constitutes one of the best agreement reported in the literature. Because both instruments show similar profiles within their combined uncertainties, we conclude that the Pico-SDLA H2O and FLASH-B data sets are mutually consistent. [ABSTRACT FROM AUTHOR]

Published
2016
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