= PDAF at the EGU General Assembly 2021 = The research group developing PDAF will be present at the EGU General Assembly from April 19 to 30, 2021 online. == Short Course == **SC5.14: Practical data assimilation with the Parallel Data Assimilation Framework**[[BR]] Convener: Lars Nerger | Co-conveners: Wolfgang Kurtz, Nabir Mamnun, Qi Tang, Gernot Geppert Friday, 30 April, 10:00 - 11:00, Online In this Short Course we provide an overview of ensemble data assimilation and how to apply it using PDAF.[[BR]] For the hands-on example we will provide a tutorial version of PDAF that will be downloadable without registration. The download link will be announced during the short course. Tutorial code: [http://pdaf.awi.de/EGU2021/download.php Tutorial code package][[BR]] Slides: [http://pdaf.awi.de/EGU2021/Tutorial_EGU21.pdf Full set of Slides] == Session on Data Assimilation == **NP5.1 - Inverse problems, Predictability, and Uncertainty Quantification in Geosciences using data assimilation and its combination with machine learning**[[BR]] Convener: Javier Amezcua | Co-conveners: Alberto Carrassi, Sergey Frolov, Tijana Janjic, Lars Nerger, Olivier Talagrand[[BR]] Tuesday, 27 April, 09:00–12:30 CEST == Presentations by PDAF developers == **Ensemble data assimilation for systems with different degrees of nonlinearity with a hybrid nonlinear-Kalman ensemble transform filter**[[BR]] Lars Nerger[[BR]] vPICO, NP5.1, Tuesday, 27 April, 9:00-12:30 CEST **Strongly coupled data assimilation with the coupled ocean-atmosphere model AWI-CM: comparison with the weakly coupled data assimilation**[[BR]] Qi Tang, Longjiang Mu, Helge Goessling, Tido Semmler, and Lars Nerger[[BR]] vPICO, NP5.1, Tuesday, 27 April, 9:00-12:30 CEST == Presentations by PDAF Users == There will also be presentations by different users of PDAF, for example[[BR]] **Ensemble-based data assimilation of volcanic aerosols using FALL3D+PDAF**[[BR]] Leonardo Mingari, Andrew Prata, and Federica Pardini[[BR]] vPICO, NH6.9/EMRP2.3/ESSI2.4/GD8.4/GMPV1.6/SM8.3, Thursday, 29 April, 11:00–11:02 **Inferring mantle viscosity through data assimilation of relative sea level observations in a glacial isostatic adjustment model**[[BR]] Reyko Schachtschneider, Jan Saynisch-Wagner, Volker Klemann, Meike Bagge, and Maik Thomas[[BR]] vPICO, CR3.9/CL4.4/G3.7/GD8.11/GM7.2, Thursday, 29 April, 15:51–15:53