Lauriane Batté Former researcher at CNRM (UMR CNRS & Météo France) GMGEC/PASTEL Climate and Large Scale Modelling Group / Seasonal Prediction and Teleconnections Team Current position: Head of the Climate analysis and seasonal forecasting department at the Climatology and Climate Services Directorate, Météo-France 42, Av. G. Coriolis 31057 Toulouse Cedex 1, France Tél. +33 (0) 5 61 07 96 80 Fax +33 (0) 5 61 07 96 10 E-mail : lauriane dot batte at meteo dot fr Former Research team leader (Feb. 2019 - Dec. 2022) Researcher on climate forecasting since Jan. 2014 Civil servant (Ingénieur des Ponts, Eaux et Forêts);

 Research interests

• Seasonal predictions using dynamical coupled climate models
• Stochastic methods in atmospheric models
• Accounting for model uncertainties: ensemble methods
• Evaluation of seasonal prediction skill: focus on Euro-Atlantic region and West African Monsoon region

Scientific projects

Ongoing

• Operational activities: scientific lead of the C3S2-370 contract; provision of operational seasonal forecasts by Météo-France in the framework of Copernicus Climate Change Services

Past

• WP co-leader in the H2020 CONFESS project
• Involved in the H2020 TRIATLAS project (WP8)
• Météo-France PI and WP2 co-leader in the ERA4CS MEDSCOPE project (2017-2020)
• CNRM PI (2018-2021) and scientist in the H2020 APPLICATE project (WP5 and WP3, climate predictability)
• Involved in FP7 SPECS project (WP4.4, model inadequacies)
• Involved in AMMA2 (seasonal predictability of precipitations over West Africa)
• Involved in the H2020 PROSNOW project (WP1, statistical downscaling of seasonal forecasts over mountainous regions)
• Involved in French Agence Nationale de Recherche (ANR) project ACASIS (WP3, heat wave predictability at subseasonal and seasonal time scales)

 Tutoring

• Advisor for Morgane Le Breton’s DRU thesis (2 years project, 2020-2022): Stratégies d’initialisation couplée pour la prévision saisonnière SDUEE doctoral school, INP Toulouse, Toulouse; co-funded by Région Occitanie
• Advisor for Damien Specq’s PhD thesis (2017-2020): Subseasonal predictability of precipitation and extremes over New-Caledonia SDUEE doctoral school, Université Paul Sabatier, Toulouse
• Advisor for Constantin Ardilouze’s PhD thesis (2016-2019): Seasonal predictability with CNRM-CM6: contribution from land surface and its initialization SDUEE doctoral school, Université Paul Sabatier, Toulouse

• Advisor for Loïs Pourchet’s MSc degree internship (2022): Caracterizing intense precipitation events at the S2S time scale and their predictability 2nd year MSc Statistics (Sorbonne University, Paris)
• Advisor for Fleur Nicolay’s MSc degree internship (2020): Coupled initialization of seasonal predictions 2nd year MSc SOAC (Université Paul Sabatier, Toulouse)
• Advisor for Salomé Antoine’s MSc degree internship (2019): S2S predictability of cold spells over France M2 SOAC (Université Paul Sabatier, Toulouse)
• Advisor for Olivier Demoly’s engineer internship (2018): Analysis of seasonal forecasts with CNRM-CM6-1 over the North Atlantic and Arctic regions French "grande école" Institut Supérieur de l’Aéronautique et de l’Espace (ISAE/Supaéro)
• Advisor for Cindy Souan’s MSc degree internship (2017): Impact of a cold anomaly in the North Atlantic on seasonal predictions for summer 2015 2nd year MSc OASC (Université Paul Sabatier, Toulouse)
• Advisor for Audrey Brouillet’s MSc degree internship (2015): Tropical-extratropical teleconnections in CMIP5 models and in seasonal prediction mode 2nd year MSc "Interactions Climat-Environnement" (Université de Versailles - St Quentin)

 Other contributions

• Member (2019-2023) of the WCRP Working Group on Subseasonal to Interdecadal Prediction (WGSIP)

• Mentor to encourage female high school students to study in STEM (Capital Filles program)

• S2D scientific organizing committee member for the 2018 WCRP S2S-S2D conference

• Co-convener of EMS/ECAC 2018-2021 sessions on MEDSCOPE

• Co-convener of EGU 2018 session Extreme heat events: processes, impacts and adaptation

• Report for the Météo-France scientific advisory committee on seasonal and S2S predictions (2021, in French)

• Batté L., F. Driouech and C. Ardilouze, 2016: Seasonal forecasts of droughts and water resources. The Mediterranean Region under Climate Change: A Scientific Update, pp. 597-604, subchapter 3.4.4 of a book edited by the French AllEnvi for the COP22 in Marrakech (Morocco) and available online.

• Reviewer for Climate Dynamics, Geophysical Research Letters, Journal of Applied Meteorology and Climatology, Quarterly Journal of the Royal Meteorological Society, Atmospheric Science Letters...

 Main peer-reviewed publications

Updated list on ORCID

• Batté, L., Välisuo I., Chevallier M., Acosta Navarro J.C., Ortega P. and Smith D., 2020. Summer predictions of Arctic sea ice edge in multi-model seasonal re-forecasts. Clim. Dyn., 54, 5013–5029. DOI: 10.1007/s00382-020-05273-8

• Batté, L., C. Ardilouze and M. Déqué, 2018: Forecasting West African heat waves at sub-seasonal and seasonal time scales. Monthly Weather Review, DOI:10.1175/MWR-D-17-0117.1 Abstract Unedited version

• Prodhomme, C., L. Batté, F. Massonnet, P. Davini, O. Bellprat, V. Guemas, and F. Doblas-Reyes, 2016: Benefits of increasing the model resolution for the seasonal forecast quality in EC-Earth. Journal of Climate, vol. 29, pp 9141–9162, DOI:10.1175/JCLI-D-16-0117.1 Access here

• Batté and Déqué, 2016 : Randomly correcting model errors in the ARPEGE-Climate v6.1 component of CNRM-CM: applications for seasonal forecasts. Geoscientific Model Development, vol. 9, pp 2055-2076, DOI 10.5194/gmd-9-2055-2016 Open Access

• Batté and Doblas-Reyes, 2015 : Stochastic atmospheric perturbations in the EC-Earth3 global coupled model: impact of SPPT on seasonal forecast quality Climate Dynamics, vol. 45, pp 3419-3439, DOI 10.1007/s00382-015-2548-7 Abstract

• Batté and Déqué, 2012 : A stochastic method for improving seasonal predictions Geophysical Research Letters, in press, DOI 10.1029/2012GL051406 Abstract

  

• Batté and Déqué, 2011 : Seasonal predictions of precipitation over Africa using coupled ocean-atmosphere general circulation models: skill of the ENSEMBLES project multimodel ensemble forecasts Tellus A, vol. 63, issue 2, pp 283-299, DOI 10.1111/j.1600-0870.2010.00493.x

 Conferences / Workshops

• An overview of subseasonal and seasonal prediction research activities at CNRM Invited speaker, ITN CAFE online workshop, visioconférence, septembre 2021

• La prévision saisonnière Invited speaker, Réseau perception du climat, CERES, visioconférence, mars 2021 (in French)

• Dealing with uncertainties in seasonal predictions. Invited speaker, CITES 2019 School, Moscow (Russia), May 2019

• Forecasting springtime Sahelian heat waves at seasonal and sub-seasonal time scales. Oral presentation, ANR ACASIS final meeting, Saint Louis (Senegal), October 2018

• Vagues de chaleur en Afrique dans un monde à +2°C. (Work by Michel Déqué) Oral presentation, ANR ACASIS final meeting, Saint Louis (Senegal), October 2018

• A multi-system evaluation of predictive capacity over the Arctic and mid-latitudes at the seasonal time scale. Poster, WCRP S2S/S2D international conferences, Boulder (USA), September 2018

• Forecasting springtime Sahelian heat waves at seasonal and sub-seasonal time scales. Oral presentation, WCRP S2S/S2D international conferences, Boulder (USA), September 2018

• Assessment of the multimodel forecast skill of precipitation over New Caledonia (SW Pacific) at the subseasonal time scale. (Damien Specq’s PhD work) Poster, WCRP S2S/S2D international conferences, Boulder (USA), September 2018

• Verification of Arctic sea ice seasonal predictive capacity in APPLICATE re-forecasts. Oral presentation, EMS/ECAC 2018, Budapest (Hungary), September 2018

• The Météo-France contribution to the ERA4CS-MEDSCOPE project: plans and preliminary results. Poster, EMS/ECAC 2018, Budapest (Hungary), September 2018

• A stochastic in-run bias correction method for seasonal predictions. Poster, 2nd workshop on Bias Correction in Climate Studies, Santander (Spain), May 2018

• Principes de la prévision saisonnière - Recherche et systèmes opérationnels. Oral presentation, Météo-France/INRA MEDSCOPE workshop, Toulouse, March 2018 (in French)

• Prévision saisonnière en Afrique: Activités de recherche au CNRM. Oral presentation, CREWS/Burkina Faso workshop, Toulouse, February 2018 (in French)

• Processes and Sources of Predictability over the Mediterranean region. Oral presentation, MEDSCOPE kick-off meeting, Barcelona (Spain), October 2017

• Introduction to seasonal forecasting: basic principles, evaluation and applications for climate services. Oral presentation, PROSNOW kick-off meeting, Grenoble (France), September 2017

• Monthly and seasonal predictability of heat waves over West Africa with CNRM-CM. Oral presentation, EGU General Assembly 2017, Vienna (Austria), April 2017

• The Météo-France coupled seasonal forecasting system 6 for C3S: design and evaluation. Poster, C3S General Assembly, Toulouse, March 2017

• Le système couplé de prévision saisonnière à Météo-France pour Copernicus C3S. Oral presentation, Ateliers de Modélisation de l’Atmosphère, Toulouse, January 2017 (in French)

• Perturbing the atmosphere in coupled seasonal forecasts: lessons from CNRM-CM and EC-Earth. Invited young scientist speaker, ECOMS International Conference, Exeter (UK), October 2016

• Introduction of SPPT perturbations in the ARPEGE-Climate component of CNRM-CM. Oral presentation, SPECS Final General Assembly, Exeter (UK), October 2016

• Predictability of heat waves over West Africa in subseasonal and seasonal reforecasts with CNRM-CM. Oral presentation, EMS/ECAC 2016, Trieste (Italy), September 2016

• Assessing the impact of random corrections of the atmospheric component in seasonal predictions with CNRM-CM. Oral presentation, EMS/ECAC 2016, Trieste (Italy), September 2016

• Predictability of Sahelian heat waves at a seasonal time scale with the CNRM-CM coupled model. Oral presentation (in French), ACASIS mid-term project meeting, Paris, June 2016

• Randomly correcting model errors in the atmospheric component of CNRM-CM and impact on seasonal forecast quality. Oral presentation, SPECS/PREFACE/WCRP Workshop on Initial Shock, Drift, Bias Adjustment in Climate Prediction, Barcelona (Spain), May 2016

• Representing atmospheric model uncertainties: Applications in seasonal forecasts with CNRM-CM. Poster, WWRP-ECMWF Workshop on Model Uncertainty, Reading (UK), April 2016

• Subseasonal-to-seasonal predictions with the CNRM-CM global coupled model. Poster, Workshop on subseasonal predictability, ECMWF, Reading (UK), November 2015

• Perturbations of atmospheric model dynamics in CNRM-CM. Oral presentation, SPECS 4th General Assembly, SMHI, Nörrköping (Sweden), September 2015

• Perturbations stochastiques de l’atmosphère en prévision saisonnière. Rencontres R&D Météo-France, Toulouse, June 2015 (in French)

• Perturbations of atmospheric model dynamics : applications for seasonal predictions. Oral presentation, Stochastic Parametrization Workshop, ECMWF, Reading (UK), March 2015

• Representing the North Atlantic Oscillation in a seasonal prediction model: predictability and uncertainties. Oral presentation, Ateliers de Modélisation de l’Atmosphère, Toulouse, January 2015

• Accounting for model uncertainty in EC-Earth3: impact of SPPT on seasonal forecast quality. Oral presentation, EGU General Assembly, Vienna, Austria, May 2014

• Introducing a « stochastic dynamics » technique to account for atmospheric model uncertainty at a seasonal time scale. Poster, EGU General Assembly, Vienna, Austria, May 2014

• Impact of atmospheric stochastic perturbations on seasonal forecast quality in EC-Earth3. Oral presentation, International EC-Earth meeting, ECMWF, Reading, UK, February 2014

• Stochastic atmospheric perturbations in the EC-Earth v3 Earth system model: impact on seasonal predictions Oral presentation, University of Bonn Meteorology Institute Symposium on Stochastic Parameterizations in Weather and Climate Models, Bonn, September 2013

• A stochastic dynamics method for ensemble seasonal forecasts with the CNRM-CM5.1 GCM Poster, WCRP International Workshop on seasonal to decadal predictions, Toulouse, May 2013 poster abstract here

• A stochastic dynamics method for ensemble seasonal forecasts with the CNRM-CM5.1 GCM Poster, International conference on Ensemble Methods in Geophysical Sciences, Toulouse, November 2012

• Seasonal predictions of summer precipitation over West Africa using the CNRM-CM5 GCM Oral presentation, 4th AMMA International Conference, Toulouse, July 2012

• Prévisions d’ensemble à l’échelle saisonnière avec un modèle couplé Arpège-Climat - NEMO: impact de la résolution et de la méthode de génération des ensembles Poster, Ateliers de Modélisation de l’Atmosphère, January 2012 (in French)

• Perturbations stochastiques de la dynamique du modèle Arpège-Climat en prévision saisonnière, impact sur la représentation de la circulation atmosphérique de grande échelle Oral presentation, Ateliers de Modélisation de l’Atmosphère, January 2012
• Seasonal predictions of summer precipitation over West Africa using coupled GCMs : skill of the ENSEMBLES project multi-model forecasts Oral presentation, EGU General Assembly, Vienne, April 2011
• Evaluation des prévisions saisonnières de précipitation du stream 2 d’ENSEMBLES sur l’Afrique de l’ouest Oral presentation, AMMA-France Workshop, November 2010 (in French)
• Prévisions saisonnières de précipitation en Afrique de l’ouest : évaluation des simulations ENSEMBLES stream 2 Oral presentation, Ateliers de Modélisation de l’Atmosphère, Toulouse, January 2010 (in French)

 Curriculum and Academic Background

Visiting scientist at IC3 in 2013
Visitor at IC3 in the Climate Forecasting Unit (CFU, now merged into BSC Earth Sciences department) led by Francisco Doblas-Reyes:

• Impact of the SPPT (Stochastically Perturbed Parameterized Tendencies) method on the EC-Earth3 ESM at a seasonal time scale
• Implementation of the stochastic dynamics technique in IFS and impact on seasonal predictions with EC-Earth3

PhD thesis: Ensemble forecasts at a seasonal time scale: introduction of a stochastic dynamics technique

PhD advisors : Michel Déqué (CNRM) and Marc Bocquet (CEREA); thesis defended in January 2013.

• Skill assessment of the ENSEMBLES project seasonal re-forecasts over Africa
• Addressing model uncertainty in the global coupled model CNRM-CM5 in a seasonal forecast framework, by adding stochastic perturbations to the dynamics of the atmospheric model Arpege-Climat

The thesis is available (in french) on the TEL website.

Graduate studies

– Master of Science in "Ocean, Atmosphere, Climate and Remote Sensing" at Université Pierre et Marie Curie (UPMC-Paris 6, France)
– Masters’ thesis internship at CERFACS (Aviation and Environment team) on the modeling of radiative transfer in contrails (in French):

– Degree of engineering from the "grande école" Ecole Polytechnique after a year of specialization at Ecole des Ponts - Paris Tech (major in Mathematics and Computer Science for Engineering)
– Three month internship at CIMA/CONICET (University of Buenos Aires) on the evaluation of the DEMETER project seasonal forecasts of the American monsoon systems (in English):

Le contenu de cette page n’engage que son auteur et en aucune manière la responsabilité de l’UMR CNRM. No one shall be held responsible, scientifically or otherwise for the content of these pages / articles, but the authors themselves and in no way the responsibility of the UMR CNRM.