EGU2020-20717
https://doi.org/10.5194/egusphere-egu2020-20717
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The effect of land –atmospheric feedbacks on the intensification and propagation of the 2018 drought in Europe

Fares Al Hasan1, Ruud J. van der Ent12, and Susan C. Steele‐Dunne3
Fares Al Hasan et al.
  • 1Delft University of Technology, Department of Water Management, Faculty of Civil Engineering and Geociences, Delft, Netherlands.
  • 2Delft University of Technology, Department of Water Management, Faculty of Civil Engineering and Geociences, Delft, Netherlands.
  • 3Delft University of Technology, Department of Water Management, Faculty of Civil Engineering and Geociences, Delft, Netherlands.

The recent 2018 summer drought in Europe has been particularly extreme in terms of intensity and impact. However, how did this drought develop in time and space in such an extreme way, and what role did the change in land-atmosphere feedbacks play in the propagation and intensification of the drought in Europe.

To answer those questions, we used remote sensing products of soil moisture and NDVI to see where the 2018 drought started and how it developed over time and space. Then we used the atmospheric water vapour flow tracking method (WAM-2layers) to investigate whether the drought intensification and displacement was related to the lack of water vapour transport from the regions that first experienced the drought. To this end, we identified the anomalies in the atmospheric water vapour imports and exports within Europe during  the spring, summer, and autumn seasons 2018.

Our soil moisture and NDVI analysis shows that the 2018 drought started in June in the Scandinavian countries and the British Isles and with time started to intensify and to move toward the west of Europe and after that to the southeast of Europe. The lack of land water vapour transportation from upwind regions (Scandinavian countries and British Isles) was partly responsible for the lack of re-precipitated water vapour in the downwind regions (West, South, Southeast, and East of Europe). From this study, we can conclude that extreme drought events propagate and intensify with time from upwind regions to downwind regions.

 

How to cite: Al Hasan, F., J. van der Ent1, R., and C. Steele‐Dunne, S.: The effect of land –atmospheric feedbacks on the intensification and propagation of the 2018 drought in Europe, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-20717, https://doi.org/10.5194/egusphere-egu2020-20717, 2020

Display materials

Display file

Comments on the display material

AC: Author Comment | CC: Community Comment | Report abuse

Display material version 1 – uploaded on 04 May 2020, no comments