Monitoring climate change requires accurate and reliable atmospheric data to understand and predict changes in weather patterns, temperature, and other critical variables. This question aims to identify specific sources or platforms that provide atmospheric data essential for climate change research and monitoring. It seeks to explore the most trusted and widely used data sources, such as satellite missions, ground-based observation networks, and climate models, and to understand their strengths, limitations, and applications in climate science. The goal is to provide researchers and policymakers with information on where to obtain high-quality atmospheric data to support their efforts in studying and mitigating the impacts of climate change.