Lecturer: Iris Thurnherr, Universitet Bergen Date: 2022-03-31 10:00 Place: Aula
The ISLAS2022 campaign: taking the pulse of the atmospheric water cycle
The hydrological cycle is a large source of uncertainties in weather prediction and climate models. Particularly processes that occur on scales smaller than the model grid of weather prediction models, for example involving clouds and precipitation, lead to errors that are difficult to detect and correct for. Within the ISLAS project, we aim to improve the understanding of hydrological extremes, the response of the water cycle to a changing climate, and the interpretation of paleoclimate records, with the use of the stable isotope composition of water vapour. We use stable isotopes as origin and process tracers in the atmospheric water cycle, that can be obtained from in-situ measurements, and remote-sensing observations. The Nordic Seas are an ideal natural laboratory, with distinct evaporation events, shallow transport processes, and swift precipitation formation. During the ISLAS campaign, we make targeted observations of the atmospheric water cycle during specific weather events, using aircraft based at Kiruna, ship-based measurements, and ground-based measurements at several super-sites. In the presentation, we present the measurement principles, our approach to follow water through the atmosphere, and give some first examples during the time in Kiruna.
The seminar is also online. See emails for connection details.
Created 2021-09-28 08:30:59 by Mats Holmström Last changed 2022-03-30 19:13:34 by Uwe Raffalski
