Dr. Joël Arnault

research associate
Regional Climate and Hydrology
Phone: +49 8821 183-253
Email: joel.arnault@uni-a.de

Research topics and accomplishments

  • Land-atmosphere interactions and hydrologic cycle at regional scale

  • Coupled atmospheric-hydrological modeling at regional scale

  • Atmospheric-hydrological modeling improvement with cosmic-ray neutron soil moisture information

  • Development of a water tracing procedure and a water budget calculation tool in a coupled regional model

  • Development of a stable water isotopologue modeling procedure in a coupled regional model

  • Gravity wave dynamics and turbulence

  • Tropical cyclogenesis

  • Development of momentum, energy and vorticity budget calculation tools in a regional model

current research projects

List of first author publications

Arnault J., K. Niezgoda, G. Jung, A. Hahn, M. Zabel, E. Schefuß, and H. Kunstmann, 2022: Disentangling the contribution of moisture source change to isotopic proxy signatures: Deuterium tracing with WRF-Hydro-iso-tag and application to southern African Holocene sediment archives, J. Clim., 35, 3855-3879. https://doi.org/10.1175/JCLI-D-22-0041.1


Arnault J., G. Jung, B. Haese, B. Fersch, T. Rummler, J. Wei, Z. Zhang, H. Kunstmann, 2021: A joint soil-vegetation-atmospheric modeling procedure of water isotopologues: Implementation and application to different climate zones with WRF-Hydro-iso. J. Adv. Model. Earth Syst., 13, e2021MS002562. https://doi.org/10.1029/2021MS002562


Arnault J., B. Fersch, T. Rummler, Z. Zhang, G. M. Quenum, J. Wei, M. Graf, P. Laux, and H. Kunstmann, 2021: Lateral terrestrial water flow contribution to summer precipitation at continental scale – A comparison between Europe and West Africa with WRF-Hydro-tag ensembles. Hydrol. Process. 35, e14183. https://doi.org/10.1002/hyp.14183


Arnault J., J. Wei, T. Rummler, B. Fersch, Z. Zhang, G. Jung, S. Wagner, and H. Kunstmann, 2019: A joint soilvegetationatmospheric water tagging procedure with WRFHydro: Implementation and application to the case of precipitation partitioning in the upper Danube river basin. Water Resour. Res., 55, 6217-6243. https://doi.org/10.1029/2019WR024780


Arnault J., T. Rummler, F. Baur, S. Lerch, S. Wagner, B. Fersch, Z. Zhang, N. Kerandi, C. Keil, and H. Kunstmann, 2018: Precipitation sensitivity to the uncertainty of terrestrial water flow in WRF-Hydro – An ensemble analysis for Central Europe. J. Hydrometeor., 19, 1007–1025. https://doi.org/10.1175/JHM-D-17-0042.1


Arnault, J., R. Knoche, J. Hui, and H. Kunstmann, 2016: Evaporation tagging and atmospheric water budget analysis with WRF: A regional precipitation recycling study for West Africa, Water Resour. Res., 52, 1544–1567. https://doi.org/10.1002/2015WR017704


Arnault, J., S. Wagner, T. Rummler, B. Fersch, J. Bliefernicht, S. Andresen, and H. Kunstmann, 2016: Role of runoff-infiltration partitioning and resolved overland flow on land-atmosphere feedbacks: A case-study with the WRF-Hydro coupled modeling system for West Africa, J. Hydrometeor., 17, 1489–1516. https://doi.org/10.1175/JHM-D-15-0089.1


Arnault, J., 2013: Large-scale dynamical influence of a gravity wave generated over the Antarctic Peninsula - regional modelling and budget analysis, Tellus A, 65, 20254. https://doi.org/10.3402/tellusa.v65i0.20254


Arnault, J., and S. Kirkwood, 2012: Dynamical influence of gravity waves generated by the Vestfjella Mountains in Antarctica: radar observations, fine-scale modeling and kinetic energy budget analysis, Tellus A, 64, 17261. https://doi.org/10.3402/tellusa.v64i0.17261


Arnault, J., and F. Roux, 2011: Characteristics of African easterly waves associated with tropical cyclogenesis in the Cape Verde islands region in July – August – September of 2004-2008, Atm. Res., 100, 61-82. https://doi.org/10.1016/j.atmosres.2010.12.028


Arnault, J., and F. Roux, 2010: Comparison between two case-studies of developing and non-developing African easterly waves: absolute vertical vorticity budget, Mon. Wea. Rev., 138, 1420-1445. https://doi.org/10.1175/2009MWR3120.1


Arnault, J., and F. Roux, 2010: Failed cyclogenetic evolution of a West-African monsoon perturbation observed during AMMA SOP-3, J. Atmos. Sci., 67, 1863-1883. https://doi.org/10.1175/2010JAS3203.1


Arnault, J., and F. Roux, 2009: Case-study of a developing African easterly wave: an energetic point of view, J. Atmos. Sci., 66, 2991-3020. https://doi.org/10.1175/2009JAS3009.1


complete publication list via ORCID

Curriculum vitae

  • 2022-2025 (5th Postdoc): Coupled distributed modeling of soil moisture, snow and atmosphere interactions – tuned by cosmic-ray neutron sensing, Augsburg University (DFG, Cosmic Sense, FOR 2694)
  • 2019-2022 (4th Postdoc): Investigating southern African Holocene climate - bridging from the early Holocene to today, KIT/IMK-IFU, Garmisch-Partenkirchen (DFG, grant AR 1183/2-1)
  • 2015-2019 (3rd Postdoc): Role of terrestrial hydrology on precipitation, KIT/IMK-IFU, Garmisch-Partenkirchen (DFG, Waves to Weather, SFB 165)
  • 2013-2015 (2nd Postdoc): Improving the representation of West African climate with a fully coupled atmospheric-hydrological modeling system, Augsburg University (BMBF, WASCAL)
  • 2011-2013 (1st Postdoc): Dynamical influence of gravity waves observed in polar regions, Swedish Institute of Space Physics (IRF), Kiruna, Sweden
  • 2009-2010: World tour - on foot, by bike, on horseback, by camel from Marseille to Zavkhanmadal ( link)
  • 2006-2009 (PhD thesis): Cyclogenetic evolution of West African / East Atlantic convective disturbances, discipline Océan/Atmosphère, Université Paul Sabatier, Laboratoire d’Aérologie, Toulouse, France, PhD supervisor: Pr. Frank Roux
  • 2006 (Master thesis): Imaging of atmospheric waves and fine-scale structures using radar interferometry, IRF, Kiruna, Sweden
  • 2005-2006 (Master of Research): Signal Image Acoustique Optimisation
  • 2002-2006 (Ecole Nationale Supérieure de l’Aéronautique et de l’Espace, SUPAERO): the French Engineering School of Aeronautics and Space in Toulouse, France – Space Imaging In-depth course
  • 2001-2002: Special preparation in Math and Physics for the entrance exam to French Engineering Schools ("Grandes Ecoles"), Lycée Thiers, Marseille, France