With constantly growing data sizes, both an effective visualization, as well as an efficient data analysis are getting more and more important. Different tasks in visualization require different visualization strategies. Geoscience data presents particular challenges, being typically large, multivariate, multidimensional, time-varying and uncertain. This short course aims at the presentation and demonstration of commonly available visualization tools, that are especially well suited to analyze earth science data sets. We at DKRZ -- the German Climate Computing Centre -- have many years of experience in the visualization of earth science data sets, and the goal of this workshop is to pass this knowledge on to you. We will show, explain and demonstrate the tools live, with which we work in our daily routine, and show you how to create effective and meaningful visualizations using free software.