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Research in atmospheric chemistry is vital to understand and address the increasingly recognized impact of human activities on air quality and climate. Unravelling the intricacies of Earth's atmospheric chemistry demands a harmonious collaboration among various scientific approaches. At the heart of this research lies the synergy between field measurements, laboratory experiments, and computer simulations to deepen our understanding of this complex realm. Field measurements provide insights into the composition of organic trace gases and aerosol particles across diverse locations. These measurements not only unveil the atmospheric compositions but also serve as a critical testbed for evaluating the accuracy of computer models. To construct accurate models, a wealth of input parameters (e.g., thermodynamic, spectroscopic, and reaction kinetic parameters for detected constituents) is required, which can be sourced from laboratory experiments. By benchmarking the model simulations against real-world observations, we can refine our understanding of how chemical and physical processes lead to the evolution of atmospheric compositions. This themed Collection welcomes original research on advancing field measurements, laboratory experiments, and computer simulations for atmospheric chemistry, with an attempt of bridging the gap between theoretical understanding and real-world implications.