Ocean warming refers to the increase in temperature of ocean waters, which is a result of climate change. As global temperatures rise due to human activities such as burning fossil fuels and deforestation, this heat is also absorbed by the oceans, causing them to warm up. This can have significant impacts on marine ecosystems, including changes in ocean currents, melting of polar ice caps, and alterations in the behavior of marine species such as coral reefs and fish populations. Ocean warming is a major concern for scientists studying climate change, as it can lead to further disruptions in global weather patterns and ecosystems.