This video displays the global distribution of chlorophyll concentration (a proxy for the amount of algae in the ocean) simulated by a numerical climate model called Earth System Model v2.6 developed at NOAA's Geophysical Fluid Dynamics Laboratory. Climate models like ESM2.6 are often composed of fully coupled systems including the atmosphere, the ocean, the land, and in some models the ice as well, which are all essential components of the Earth. Changes in the dynamics of these systems make significant impact on each other. For example, release of excessive CO2 from the land to the atmosphere is causing a rising temperature which has modified both the atmospheric and oceanic circulations. The consequences are numerous. One of the many is an increasing number of drought events which has impacted many land plants and, more importantly, human beings ourselves. A second example is the spreading of oxygen minimum zones (OMZs) in the ocean, which is related to a reduced ventilation rate between the ocean and the atmospheric as a result of warming-induced stratification. Such OMZs can be hazardous to many friendly animals that live in the ocean interior who need oxygen to survive. In the face of global climate change, predictive tools such as climate models are urgently needed in order to help us understand the anticipated impact on global ecosystems and the quality of our life. One important goal of my research is to improve the capacity (e.g. efficiency and accuracy) of model predictions on the impact of future global climate change.