EMS Annual Meeting Abstracts
Vol. 20, EMS2023-361, 2023, updated on 06 Jul 2023
EMS Annual Meeting 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

The WINDABL project: How are the surface thermally-driven WINDs influenced by the vertical structure and horizontal inhomogeneities of the Atmospheric Boundary Layer?

Carlos Román-Cascón1, Juan Alberto Jiménez-Rincón1, Pablo Ortiz-Corral2, Carlos Yagüe2, Tina Brnas1,3, Pablo Fernández-Castillo2, Alfredo Izquierdo1, Miguel Bruno1, Roberto Mulero-Martínez1, Rubén Vázquez1,4, Jadranka Sepic3, Gert-Jan Steeneveld5, José Antonio Adame6, Cristina Vegas-Cañas2, Juan Carbone2, Fabienne Lohou7, and Marie Lothon7
Carlos Román-Cascón et al.
  • 1University of Cádiz, INMAR, Applied Physics Department, Puerto Real, Spain (carlos.roman@uca.es)
  • 2Departamento de Física de la Tierra y Astrofísica. Universidad Complutense de Madrid. 28040 Madrid, Spain.
  • 3Faculty of Sciences, University of Split. 21000 Split, Croatia
  • 4Department of Physics and Mathematics, University of Alcalá, Alcalá de Henares 28801, Spain
  • 5Meteorology and Air Quality (MAQ) Section. Wageningen University. Wageningen, The Netherlands.
  • 6Atmospheric Sounding Station, El Arenosillo observatory. National Institute for Aerospace Technology. 21130 Mazagón, Huelva, Spain.
  • 7Laboratorie d’Aerologie, CNRS, Université de Toulouse, 31400 Toulouse, France

Thermally-driven breezes are diurnal wind circulations initiated by surface temperature gradients in coastal and mountainous areas when fair-weather synoptic conditions dominate. Understanding these breezes is crucial for many other physical processes or human applications: wind energy, human thermal comfort, transport and diffusion of pollutants/humidity, sea surface currents in coastal areas, convection initiation, or local weather differences, among others.

The characteristics of the mountain and coastal breezes depend on the strength of the surface temperature gradient, but also on the interaction with other winds of different spatio-temporal scales, such as synoptical winds. Besides, the thermodynamic vertical profile of the atmospheric boundary layer (ABL) can also impact the breeze characteristics. In this context, some recent modelling experiments have shown how the vertical structure of the pre-existing ABL is a key factor controlling the relative impact that specific surface changes have on the breeze evolution. This motivates further modelling and observational experiments, which is the main objective of the WINDABL project*.

Hence, we plan to characterise the vertical ABL structure and the horizontal heterogeneity of the terrain during favourable conditions for the breeze formation in coastal and mountainous areas. This will be carried out mainly with the launching of meteorological soundings and through the installation of meteorological stations at strategic locations, including surface turbulence measurements. The coastal area of interest corresponds to the northern part of the Gulf of Cádiz (southwestern Iberian Peninsula coast) while the mountain breezes will be investigated at the Vallée d’Aure, on the Northern side of the Pyrenees, taking advantage of the large amount of instrumentation that will be deployed close to this area in 2023 during the MOSAI field campaign**, and in collaboration with the LATMOS-i project***.

This joint observational effort will be complemented with high-resolution numerical simulations of selected cases with the Weather Research and Forecasting (WRF) model. In this sense, the observational data gathered with the new instrumentation will allow for a much more detailed model evaluation, for which a sensitivity study to the selected physical parameterizations will be performed.

In this work we will present the main observational and modelling strategy of WINDABL, as well as some preliminary results obtained from the observational data and numerical experiments.


* The WINDABL project (PR2022-055) is a project to impulse the career of young researchers funded by the University of Cádiz (Spain) (Plan Propio).

 ** MOSAI (Model and Observation for Surface-Atmosphere Interactions, https://mosai.aeris-data.fr/).

*** LATMOS-i (Land-ATMOSphere interactions in a changing environment: How do they impact on atmospheric-boundary-layer processes at the meso, sub-meso and local scales in mountainous and coastal areas?) (PID2020-115321RB-I00, funded by MCIN/AEI/ 10.13039/501100011033).

How to cite: Román-Cascón, C., Jiménez-Rincón, J. A., Ortiz-Corral, P., Yagüe, C., Brnas, T., Fernández-Castillo, P., Izquierdo, A., Bruno, M., Mulero-Martínez, R., Vázquez, R., Sepic, J., Steeneveld, G.-J., Adame, J. A., Vegas-Cañas, C., Carbone, J., Lohou, F., and Lothon, M.: The WINDABL project: How are the surface thermally-driven WINDs influenced by the vertical structure and horizontal inhomogeneities of the Atmospheric Boundary Layer?, EMS Annual Meeting 2023, Bratislava, Slovakia, 4–8 Sep 2023, EMS2023-361, https://doi.org/10.5194/ems2023-361, 2023.