Tsunami as a natural phenomenon not only has a direct impact on life around the coast, but also has wider implications for the world climate system. Tsunami triggers, often originating from undersea earthquakes, volcanic eruptions, or landslides, have short and long-term effects on marine and atmospheric ecosystems. Tsunamis can cause damage to habitats such as coral reefs and mangrove forests, which function as important carbon sinks. One of the initial impacts of the tsunami was a reduction in carbon stocks in the ocean. When coral reefs and coastal ecosystems are damaged, their ability to absorb CO2 is hampered. This condition has the potential to accelerate global warming. In addition, sea water distributed due to tsunami waves can change salinity patterns, which then affects the distribution of fish and other marine species. These changes could have further impacts on the marine food chain, which is essential for ecosystem balance. Furthermore, sedimentation caused by tsunamis often carries material from land into the sea, destroying marine life habitats. This not only threatens biodiversity, but can also disrupt local economies that depend on fisheries. With fish populations dwindling, coastal residents who depend on this resource could face an economic crisis. In a climate context, temperature shifts that occur in the ocean due to the movement of tsunami water masses can change weather patterns. These changes are not always immediately visible, but can appear as anomalies in rainfall or storm frequency. Ecosystems on land are also feeling the impact, where plants may not adapt quickly to changes in temperature and salinity, thereby threatening food security. It is important to note that these changes are not static. With the increasing frequency and intensity of natural disasters due to climate change, areas that have been affected by tsunamis may be more vulnerable to broader climate impacts, creating a cycle of ongoing threats. The tsunami that occurred not only affected one region, but the reverberations of the disaster could be felt throughout the world through changes in species migration patterns and biomass distribution. The link between tsunamis and climate change requires global attention. Initiatives to protect coastal ecosystems, such as restoration of coral reefs and mangrove forests, are very important. These interventions, if carried out effectively, can minimize the long-term impacts of tsunamis, as well as contribute to climate change mitigation. Integration of science and policy aimed at reducing coastal vulnerability to tsunamis and broader climate impacts is key. Adaptation and mitigation, through international collaboration, will be one pillar in facing this challenge in the future.