Date: Sunday, 6 September 2026, 14:30 – 17:30 CEST
Format: onsite
Where: This training will take place in-person at the conference venue
Addressed to: 10-15 participants

Registration: Registration for the workshop is required! The fee is 45€.
Please be aware that the booking of this workshop is only available during the registration process for the conference until 3 August! After 3 August, and independent of the conference registration, no bookings will be possible.

Workshop description:
On the Sunday afternoon before EMS starts we organize a moisture tracking workshop to get acquainted with the concept and tools to determine the sources of precipitation (i.e. where the moisture that rained out originally evaporated). Or reverse, determine where evaporation will eventually lead to precipitation. Moisture tracking is a popular tool that can be applied in the field of hydro- and synoptic meteorology to quantify and understand the processes driving (extreme) precipitation, but is also relevant to understand land-atmosphere feedbacks and the impact of land-use changes on the water cycle. In this workshop you will get acquainted with the WAM2layers moisture tracking model (Kalverla et al., 2025).

The workshop will start with a short introduction on the concept, explaining the methods, and the involved uncertainties. Then, it is time for hands-on practice by simulating some moisture sources yourself choosing from two options: 1) determining the sources of the extreme precipitation case over western Europe in July 2021 that we prepare or 2) select an extreme precipitation case or evaporation region of your interest and perform a case study of interest during the workshop. For the latter, make sure you download the ERA5 data for your case before the workshop (we will provide you with instructions on how to download the data after you signed up for the workshop, this will take about 2 hours of your time).

After the workshop you will be able to run the WAM2layers moisture tracking model by yourself, and determine moisture sources for your own interest and apply it in your own research niche. To accommodate the room for the workshop (in the conference centre) we ask for a fee of 45 euro to attend the workshop.

References

Kalverla, P., Benedict, I., Weijenborg, C., and van der Ent, R. J.: Atmospheric moisture tracking with WAM2layers v3, Geosci. Model Dev., 18, 4335–4352, https://doi.org/10.5194/gmd-18-4335-2025, 2025.

WAM2layers Moisture tracking code and documentation on Github: https://github.com/WAM2layers