EGU23-451, updated on 22 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

How often did Mediterranean regions transition to different hydroclimatic regimes in the last millennium? 

Arnau Sanz i Gil1, Akbar Rahmati Ziveh1, Hossein Abbasizadeh1, Vishal Thakur1, Martin Hanel1, Petr Maca1, Oldrich Rakovec1,2, and Yannis Markonis1
Arnau Sanz i Gil et al.
  • 1Czech University of Life Sciences, Czechia
  • 2Helmholtz Centre for Environmental Research GmbH - UFZ, CHS, Germany

The Mediterranean has been characterized as a region of enhanced climatic variability. Transitions between dry and wet conditions have repeatedly occurred over the last millennium in various spatial and temporal scales. However, the frequency of these shifts is poorly assessed due to the low amount of paleoclimatic reconstructions and the substantial heterogeneity of the Mediterranean. Here, we examine how often Mediterranean regions have transitioned between different hydroclimatic regimes over the last millennium. For this purpose, we use the Paleo Hydrodynamics Data Assimilation (PHYDA) simulation results to identify transitional changes based on Köppen-Geiger climate types. Our results indicate which regions are more likely to experience transitions between hydroclimatic regimes and their duration distribution. We also examine how the intensity of the shifts have fluctuated during the study period and quantify the uncertainties involved. Our findings contribute to a better understanding of the past hydroclimatic variability, which is crucial for further determining the current state and future aridification in the Mediterranean region.  

How to cite: Sanz i Gil, A., Rahmati Ziveh, A., Abbasizadeh, H., Thakur, V., Hanel, M., Maca, P., Rakovec, O., and Markonis, Y.: How often did Mediterranean regions transition to different hydroclimatic regimes in the last millennium? , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-451,, 2023.