Hélène BROGNIEZ

Fonction

Professeure à l’Université de Versailles St Quentin-en-Yvelines (UVSQ) / Université Paris-Saclay

Directrice de la Graduate School « Géosciences, Climat, Environnement et Planètes » de l’Université Paris-Saclay, depuis Janvier 2023

Activités de recherche

Mes activités de recherche portent sur le climat des régions tropicales et sur la physique de l’atmosphère.

Pour cela, j’utilise principalement les observations satellites et je suis impliquée à plusieurs niveaux dans différents projets

• The C2OMODO/CNES future satellite mission (lead scientist), part of the NASA/AOS (Atmosphere Observing System) project
• The Megha-Tropiques indo-french satellite, supported by CNES and ISRO (2011-today): PI of the scientific products derived from the SAPHIR instrument
• Paris-Saclay SPACE-OBS incubator for space missions (Co-PI 2017-2020)
• GEWEX (WCRP) Water Vapor Assessment GVAP : member since 2011; co-chair 2016-2020
• Member of the GEWEX (WCRP) Data Assessment Panel GDAP (since 2021)
• ESA Climate Change Initiative on Water Vapour http://cci.esa.int/watervapour (Co-I) Phase 1 : 2018-2021, Phase 2 : 2022 – 2025

CV

Formation

Emplois Académiques

Enseignement

Livre « Principes de télédétection : Applications à l’observation de la Terre et de son climat », Dunod Sciences Sup, 2023 (ici)

• Niveau Licence
  • Optique et électrocinétique
  • Electromagnétisme
  • Thermodynamique
  • Système Terre : Méthodes d’observations et Dynamique des fluides
• Niveau Master
  • Transfert Radiatif / interactions rayonnement – matière
  • Physique du Climat
  • Dynamique des fluides géophysiques : océan et atmosphère
  • Observation de la Terre par télédétection

Publications scientifiques

Soumis

• Lefebvre T, H Brogniez, I. Gharbi, L. Hermozo, D. Bouniol, F. Dralet and R. Roca. Characterization of convective systems dynamics and microphysics using time-delayed tandem microwave radiometers. Submitted to IEEE Trans. Geosc. Remote Sens, dec 2024
• Ngounge Langue C ., H. Brogniez and P. Naveau: General Circulation Models evaluation at different time scales over tropical region using ESA-CCI satellite data records: a case study of water vapour and cloud cover. Submitted to ACP

Publiés

• Trent T, … H Brogniez, …31 co-auteurs… (2024) Evaluation of total column water vapour products from satellite observations and reanalyses within the GEWEX Water Vapor assessment. Atmos. Chem. Phys, 24, 9667-9695, doi:10.5194/acp-24-9667-2024.
• Galewsky J. M. Scheinder, C. Diekmann, A. Semie, S. Bony, C. Risi, K. Emmanuel and H. Brogniez (2023) The influence of convective aggregation on the stable isotopic composition of water vapor. AGU Advances
• Brogniez H., R. Roca, F. Auguste, JP Chaboureau, Z. Haddad, S. J. Munchak, X. Li, D. Bouniol, A. Dépée, T. Fiolleau and P. Kollias (2023) Time-delayed tandem microwave observations of tropical deep convection: Overview of the C2OMODO mission. Frontiers in Remote Sensing, doi:10.3389/frsen.2022.854735.
• Höjgard-Olsen E., H. Chepfer and H. Brogniez (2022) Satellite observed sensitivity of tropical clouds and moisture to sea surface temperature on various time and space scales, Part 1: focus on high level cloud situations over ocean. Journal of Geoph. Res. Atmos., 127, doi:10.1029/2021JD035438
• Höjgard-Olsen E., H. Chepfer and H. Brogniez (2022) Satellite observed sensitivity of tropical clouds and moisture to sea surface temperature on various time and space scales, Part 2: focus on marin low level clouds. Journal of Geoph. Res. Atmos., 127, doi:10.1029/2021JD035402
• Hé J., Brogniez H. and L. Picon (2022) Evaluation of tropical water vapor from CMIP6 GCMs using the ESA CCI+ “water vapor” climate data record : insights from large-scale atmospheric circulation. Atmos. Chem. Phys. 22 (18), 12591-12606, doi:10.5194/acp-22-12591-2022
• Radice C., H. Brogniez , PE Kirstetter and P. Chambon (2021) Novel assessment of modeled relative humidity with satellite probabilistic estimates. Accepted Atmos. Chem. Phys., 3811-3825, doi:10.5194/acp-2021-617.
• Prasad A., S. Sherwood and H. Brogniez (2020): Using Megha-Tropiques and radiosonde data to constrain humidity in regional convective simulations: A Northern Australian test case. Quart. J. Roy. Meteor. Soc., 146 (731), 2768-2788
• Brogniez H. and P-E Kirstetter (2020): Coupling of clouds and tropospheric humidity in the tropical western Atlantic: insight from multi-satellite observations. Geophys. Res. Lett., 47 (7), doi:10.1175/gl087466
• Höjgard-Olsen E., H. Brogniez and H. Chepfer (2020): Observed evolution of the tropical atmospheric water cycle with sea surface temperature. J. Clim, 33 (9), 3449-3470, doi:10.1175/jcli-d-19-0468.1.
• Carella G., M. Vrac, H. Brogniez, P. Yiou and H. Chepfer (2020): Statistical downscaling of water vapour satellite measurements from profiles of tropical ice clouds. Earth Syst. Sci. Data, 12, 1-20, doi:10.514/essd-12-1-2020.
• Chepfer H, H. Brogniez and V. Noël (2019): Diurnal variations of relative humidity and cloud profiles across the tropics. Nature Scientific Reports, 9: 16045, doi:10.1038/s41598-019-52437-6
• Stevens B., S. Bony, H. Brogniez, L. Hentgen, C. Hohenegger, C. Kiemle, T. L’Ecuyer, A K Naumann, H. Schulz, P. Siebesma, J. Vial, D. Winker and P. Zuidema (2019): Suger, Gravel, Fish and Flowers: mesoscale cloud patterns in the tradewinds. Quat J. Roy. Meteorol. Soc., 1-12, doi: 10.1002/qj.3662.
• Vial J., R. Vogel, S. Bony, B. Stevens, D. Winker, X. Cai, C. Hohenegger, A.K. Naumann, H. Brogniez (2019): A new look at the daily cycle of tradewind cumuli. J. Model. Earth Syst., 11, 3148-3166, doi:10.1029/2019MS001746.
• Schröder M., M. Lockhoff, L. Shi; T. August, R. Bennartz, H. Brogniez, X. Calbet, F. Fell, J. Forsythe, A. Gambacorta, S-P Ho, E.R. Kursinski, A. Reale, T. Trent and Q. Yang (2019): The GEWEX water vapour assessment: Overview and introduction to results and recommendations. Remote Sensing, 11(3), 251, doi: 10.3390/rs11030251.
• Roca R., N. Taburet, E. Lorant, P. Chambon, M. Alcoba, H. Brogniez, S. Cloché, C. Dufour, M. Gosset, C. Guilloteau (2018) Quantifying the contribution of the Megha-Tropiques mission to the estimation of daily accumulated rainfall in the tropics. Quat J. Roy. Meteorol. Soc., doi:10.1002/qj.3327.
• Bobryshev O., S. Buehler, V. John, M. Brath and H. Brogniez (2018) Is there really a closure gap between 183.31GHz satellite passive microwave and in-situ radiosonde water vapor measurements? IEEE Trans. Geosc. Rem. Sens., 56 (5), 2904-2910, doi:10.1109/TGRS.2017.2786548.
• Stevens B., H. Brogniez, C. Kiemle, J-L Lacour, C. Crevoisier and J. Kiliani (2017) Structure and dynamical influence of water vapor in the lower tropical troposphere. Surveys in Geophysics, 1-27, doi : 10.1007/s10712-017-9420-8.
• Garot T., H. Brogniez, R. Fallourd and N. Viltard (2017) Large-scale versus local-scale influences on Upper-Tropospheric Humidity distribution : a study over the Indian Ocean during winter. J. Appl. Meteor. Climatol., 56, 7, doi: 10.1175/JAMC-D-16-0193.1
• Brogniez H., S. English, J-F Mahfouf, A. Behrendt, W. Berg, S. Boukabara, S. A. Buehler, P. Chambon, A. Gambacorta, A. Geer, W. Ingram, E. R. Kursinski, M. Matricardi, T. Odintsova, V. H. Payne, P. Thorne, M. Tretyakov and J. Wang (2016) A review of sources of systematic errors and uncertainties in water vapor information derived from observations at 183GHz. Atmos. Meas. Tech., 9, 2207-2221, doi :10.5194/amt-9-2207-2016.
• Brogniez H., R. Fallourd, C. Mallet, R. Sivira and C. Dufour (2016) Estimating confidence intervals around relative humidity profiles from satellite observations: application to the SAPHIR sounder. J. Atmos. Oc. Techn., 33 (5), 1005-1022.
• Roca R., H. Brogniez, P. Chambon, O. Chomette, S. Cloché, M. E. Gosset, J-F Mahfouf, P. Raberanto and N. Viltard (2015) The Megha-Tropiques mission: a review after three years in orbit. Front. Earth Sci., 3:17, doi:10.3389/feart.2015.00017.
• Sivira R., H. Brogniez, C. Mallet and Y. Oussar (2015) A layer-averaged relative humidity profile retrieval for microwave observations: design and results for the Megha-Tropiques payload. Atmos. Meas. Tech., 8, 1055-1071
• Clain G., H. Brogniez, V. H. Payne, V.O. John and M. Luo (2015) An assessment of SAPHIR calibration using quality tropical soundings. J. Atmos. Oc. Techn., 32 (1), 61-78,doi :11.1175/JTECH-D-14-00054.1.
• Brogniez H., G. Clain and R. Roca (2015) Validation of Upper Tropospheric Humidity from SAPHIR onboard Megha-Tropiques using tropical soundings. J. Appl. Meteor. Climatol., 54, 986-908, doi :10.1175/JAMC-D-14-0096.1.
• Schröder M., R. Roca, L. Picon, A. Kniffka and H. Brogniez (2014) Climatology of free tropospheric humidity: extension to the SEVIRI era, evaluation and exemplary analysis. Atmos. Chem. Phys., 14, 11.129-11.148, doi :10.5194/acp-14-11129-2014.
• Brogniez H., P.E. Kirstetter and L. Eymard (2013) Expected improvements in the atmospheric humidity profile retrieval using the Megha-Tropiques microwave payload. Quart. J. Roy. Meteor. Soc, doi:10.1002/qj.1869.
• Roca R., R. Guzman, J. Lemond, J. Meijers, L. Picon and H. Brogniez (2012) Tropical and extra-tropical influences on the distribution of free tropospheric humidity over the intertropical belt. Survey in Geophysics, doi:10.1007/s10712-011-9169-4.
• Aires F., F. Bernardo, H. Brogniez and C. Prigent (2010) An innovative calibration method for the inversion of satellite observations. J. Appl. Meteor. Climatol., 49, 2458–2473, doi: 10.1175/2010JAMC2435.1.
• Montoux N., P. Keckhut, A. Hauchecorne, J. Jumelet, H. Brogniez and C. David (2010) Isentropic modeling of a cirrus cloud event observed in the mid-latitude UTLS. J. Geophys. Res., 115, D2, doi:10.1029/2009JD011981.
• Roca R., J-C Bergès, H. Brogniez, M. Capderou, P. Chambon P, O. Chomette, S. Cloché, T. Fiolleau, I. Jobard, J. Lémond, M. Ly, L. Picon, P. Raberanto, A. Szantai and M. Viollier (2010) On the water and energy cycle in the Tropics. Comptes Rendus Géosciences « Atmosphère vue de l’espace », 342, 390-402.
• Brogniez H., R. Roca and L. Picon (2009) A study of the free tropospheric humidity interannual variability using Meteosat data and an advection-condensation transport model. J. Clim., 22, 6773-6787.
• Brogniez H. and R.T. Pierrehumbert (2007) Intercomparison of tropical tropospheric humidity in GCMs with AMSUB water vapor data. Geophys. Res. Lett., 34, L17706, doi:10.1029/2007GL030967.
• Brogniez H. and R.T. Pierrehumbert (2006) Using microwave observations to assess large-scale control of the free tropospheric water vapor in the mid-latitudes. Geophys. Res. Lett., 33, L14801, doi:10.1029/2006GL026240.
• Brogniez H., R. Roca and L. Picon (2006) A clear sky radiances archive from METEOSAT « water vapor » observations. J. Geophys. Res., 111, D21109, doi:10.1029/2006JD007238.
• Brogniez H., R. Roca and L. Picon (2005) Evaluation of the tropical free tropospheric Humidity in AMIP-2 simulations using METEOSAT Water Vapor channel data. Geophys. Res. Lett., 32, doi:10.1029/2005GL024341.

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