November 20th–22nd 2019
Ghent | Belgium
From Zaventem Airport to Gent Sint-Pieters (main station):
From Gent Sint Pieters to the venue (Harmony hotel):
In the face of climate change, general dryness and wetness conditions are expected to change in many parts of the world. In particular, long-term droughts and shorter dry spells, have a great and immediate effect on humans and environment, causing significant life and economical losses on annual basis.
Climate models and existing observational records have already reported regional increases in duration and severity of dry events, and some agree on a future exacerbation albeit with large degrees of uncertainty. More devastating impacts on population and environment are therefore expected.
The existing uncertainties surrounding the role of local land–atmosphere feedbacks in the short-term dynamics and trends of dry events hamper the accurate forecasting and projection of these meteorological extremes.
This workshop aims at reconciling ongoing scientific efforts directed to enhance our understanding of land–atmosphere interactions and their effect on dry spells, compound drought–heatwave events, and aridity trends.
A coherent synthesis of existing knowledge from two virtually distinct communities is intended: experts working on land–atmosphere feedbacks and dry events at boundary layer scales, and climate modellers working on the effect of land surface on long-term aridity projections.
Q1 | Dry events: What is the effect of local and remote land–atmosphere feedbacks on the onset, evolution and termination of droughts and dry spells?
Current understanding of the physical factors influencing development of abnormally dry conditions suggests the key role of large-scale circulation. However, an increasing number of studies show that land surface state can play an important role, both locally and remotely. However, quantitative evidence on the relevance of land–atmosphere feedbacks on precipitation changes during droughts and dry spells is still lacking.
Q2 | Drying trends: How does the contribution of land–atmosphere feedbacks vary as climate changes and to what degree does it explain drying trends?
Simulations with climate models suggest a key role of soil moisture trends in future climate conditions. However, the exact mechanisms underlying this relationship remain unclear. The effect on precipitation triggering via land feedbacks on the boundary layer evolution is suggested as a potential reason. Fostering collaboration between the climate modelling community and the hydrometeorology community –working at boundary layer and sub-daily scales – can enhance our understanding of these long-term changes.
Alexis Berg (Harvard University) | Niklas Boers (Potsdam Institute for Climate Impact Research) | Dim Coumou (Vrije University of Amsterdam) | Simon Dadson (Oxford University) | Paul Dirmeyer (George Mason University) | Pierre Gentine (Columbia University New York) | Julia Green (LSCE) | Françoise Guichard (CNRM, Meteo France) | Jessica Keune (Ghent University) | Diego Miralles (Ghent University) | Rene Orth (MPI Jena) | Irina Petrova (Ghent University) | Joshua Roundy (University of Kansas) | Dominik Schumacher (Ghent University) | Sonia Seneviratne (ETH Zurich) | Femke Smessaert (Ghent University) | Chris Taylor (Centre for Ecology and Hydrology) | Ryan Teuling (Wageningen University and Research) | Wim Thiery (Vrije University of Brussels) | Ricardo Trigo (University of Lisbon) | Sergio Vicente Serrano (CSIC) | Hendrik Wouters (VITO / Ghent University).
Requirements: model benchmarking and representation