IRTG Travel Grants Programme

PhD researcher Fan Wu went to a Technical training for running simulations with the AOSCM in Stockholm, Sweden

My PhD project on “The effect of thermodynamic and radiation profiles on the LRF in the Arctic ABL” involves comparing simulation output to observational data, as it was determined in a previous phase of (AC)³ that interpretation of observations would greatly benefit from a modeling component. Thus, I spent two weeks working with members of the Stockholm University’s Department of Meteorology (MISU) who had already spent several years working with the relevant model – the AOSCM. While there, I was firstly introduced to MISU’s supercomputer system, Tetralith. I will later compile my own version of the model on Tetralith’s server as well as extract the input data files for my simulations with the data extraction script that will run on that server. It was explained to me what running a simulation entails. I learned what exactly is in the input file that is used to initiate the force model simulations. The available terms of the file can be adjusted via the namelist, which tells the model which terms are turned on for that simulation. Once input step is complete, the actual running of the simulation was taught. The output files were downloaded and interpreted via Python notebooks provided by my MISU colleague. I first worked using a case study from a previous workshop held by my MISU colleague. Once that was complete, I was able to get my own input file for a scenario from my PhD project and ran the simulation several times independently in order to become familiar with running simulations. The goal of the visit was to learn how to run simulations with the AOSCM and to set up an environment on my personal work computer where I can then run simulations from Leipzig. Both those goals were reached, as I successfully ran the AOSCM while still in Sweden as well as set up access on my work computer to the version of AOSCM that was precompiled on MISU’s server. Since returning to Leipzig, I have successfully ran three of my own simulations for my project and presented the results to my supervisors. I now have the basic tools I need to run simulations for my project and contacts among the people at MISU should any further questions arise. After our training, we still meet semi-regularly online as there are constantly updates regarding the model or working with the model. I look forward to collaborating with them throughout my PhD and hope to be able to contribute my own insight to their team one day. Next, I will look into learning about the AOSCM and its input and output on a deeper level so that I can gain a more expert understanding.

A list of all funded travel grants can be found on the IRTG page here.