The ocean that lies to the north of the Arctic regions is the Arctic Ocean. This ocean is the smallest and shallowest of the five major oceans, bordered by many countries, including Canada, Russia, and Greenland. The Arctic Ocean plays a critical role in the Earth's climate system, influencing weather patterns and global temperatures. Its ecosystem is rich in biodiversity, but it is also vulnerable to the effects of climate change, such as melting ice and changing sea temperatures. The ocean is crucial for research on oceans' impact on the environment.