Day 3

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Paper title 4DMED-Hydrology: capitalizing high resolution Earth Observation data for a consistent reconstruction of the Mediterranean terrestrial water cycle
Authors
  1. Christian Massari National Research Council of Italy Speaker
  2. Angelica Tarpanelli CNR-IRPI
  3. Filipe Aires CNRS, Observatoire de Paris, Sorbonne Université, Université PSL, LERMA
  4. Lorenzo Alfieri CIMA Research Foundation
  5. Francesco Avanzi CIMA Research Foundation
  6. Silvia Barbetta National Research Council of Italy, Research Institute for Geo-Hydrological Protection (CNR-IRPI)
  7. Michel Bechtold KU Leuven
  8. Luca Brocca CNR (National Research Council of Italy)
  9. Stefania Camici National Research Council (CNR)- Institute for Geo-Hydrological Protection
  10. Mariapina Castelli EURAC Research
  11. Luca Ciabatta
  12. Michele Claus EURAC, Institute for Earth Observation
  13. Jacopo Dari CNR-IRPI
  14. Richard de Jeu Planet Labs
  15. Gabriëlle De Lannoy KU Leuven
  16. Fabio Delogu CIMA Research Foundation
  17. Wouter Dorigo TU Wien, Research Group of Climate and Environmental Remote sensing
  18. Paolo Filippucci CNR - Consiglio Nazionale delle Ricerche
  19. Simone Gabellani CIMA Research Foundation
  20. Petra Hulsman Ghent University,
  21. Alexander Jacob EURAC Research
  22. Akash Koppa Ghent University
  23. Hans Lievens Ghent University
  24. Diego Miralles Ghent University
  25. Sara Modanesi CNR-IRPI
  26. Anaïs Barella Ortiz Fundació Observatori de l’Ebre - OBSEBRE
  27. VICTOR PELLET LERMA
  28. Irina Petrova
  29. Isabella Greimeister-Pfeil TU Wien, Research Group of Climate and Environmental Remote sensing
  30. Raphael Quast TU Wien, Departement of Geodesy and Geoinformatics
  31. Pere Quintana-Seguí Observatori de l’Ebre (URL-CSIC)
  32. Dominik Rains Ghent University
  33. Jaap Schellekens VanderSat B.V.
  34. Stefan Schlaffer ZAMG-Zentralanstalt für Meteorologie und Geodynamik
  35. Yves Tramblay IRD (Institut de Recherche pour le Développement)
  36. Robin van der Schalie Planet Labs
  37. Mariette Vreugdenhil Department of Geodesy and Geoinformation, TU Wien
  38. Wolfgang Wagner TU Wien
  39. Luca Zappa TU-WIEN
  40. Espen Volden ESA - European Space Agency
Form of presentation Poster
Topics
  • E3. Regional Initiatives
    • E3.06 Mediterranean Regional Applications and Science
Abstract text The Mediterranean region (MR) includes the largest semi-enclosed sea on Earth and is an area of both exceptional biodiversity value and intense and increasing human activities. MR has a unique character as it is in a transition zone between temperate, cold mild-latitudes and the tropics with several large-scale atmospheric oscillations/teleconnection patterns. This determines a high temporal variability of climate which causes periods of excess water with widespread floods followed by long drought episodes and heat waves, making the region highly vulnerable to hydrological extremes. Therefore, resolving the water cycle over the MR is central for protecting people and guaranteeing water and food security.
Previous efforts to resolve the water cycle in the MR have mainly used model outputs or reanalysis and in situ data networks. In this context, the European Space Agency (ESA) has supported significant scientific efforts to advance the way we can observe and characterise the Mediterranean water cycle from satellites with Watchful, Irrigation+, and WACMOS-Med projects. For instance, the WACMOS-Med considered several novel techniques to estimate the different components of the Mediterranean water cycle estimated by satellite observations while minimising the residual errors. WACMOS-Med provided a rational assessment of the different limitations of current satellite technology to characterise in a consistent and accurate manner the different components of the water cycle. However, limitations associated to resolution in space and time, accuracies, uncertainty definition and inter-product consistency hinder the practical use of the products for operational application in several domains (e.g., agriculture, water resource management, hydro-climatic extremes and geo-hazards) over the MR. 
Here we present a new ESA project “4DMED-Hydrology” which aims at developing an advanced, high-resolution, and consistent reconstruction of the Mediterranean terrestrial water cycle by using the latest developments of Earth Observation (EO) data as those derived from the ESA-Copernicus missions. In particular, by exploiting previous ESA initiatives, 4DMED-Hydrology intends 1) to show how this EO capacity can help to describe the interactions between complex hydrological processes and anthropogenic pressure (often difficult to model) in synergy with model-based approaches; 2) to exploit synergies among EO data to maximize the retrieval of information of the different water cycle components (i.e., precipitation, soil moisture, evaporation, runoff, river discharge) to provide an accurate representation of our environment and advanced fit-for-purpose decision support systems in a changing climate for a more resilient society. 
We organize the project in four consequent steps: 1) developing high-resolution (1 km, daily, 2015–2021) EO-based datasets of the different components of the water cycle by capitalizing on Sentinel missions’ capabilities and previous ESA projects; 2) merging these datasets to obtain land water budget closure and providing a consistent high-quality merged dataset; 3) addressing major knowledge gaps in water cycle sciences enhancing our fundamental scientific understanding of the complex processes governing the role of the MR in the Earth and climate system with the water cycle; 4) transferring novel science results into solutions for society via four user-oriented case studies focusing on flood and landslide hazard, drought and water resources management by involving operational agencies, public institutions and economic operators in the MR.​ 4DMED-Hydrology will focus on four test areas, namely the Po river basin in Italy, the Ebro River basin in Spain, the Hérault River basin in France and the Medjerda River basin in Tunisia, which are representatives of climates, topographic complexity, land use, human activities, and hydrometeorological hazards of the MR. The developed products will be then extended to the entire region. The resulting EO-based products (i.e., experimental datasets, EO products) will be distributed in an Open Science catalogue hosted and operated by ESA.