How do ocean currents affect the geographical environment?

Ocean current is the movement of water in the ocean, which has a wide impact on the geographical environment. The following are some major impacts:

Climate impact: Ocean currents can regulate global climate and climate change. For example, the North Atlantic Ocean current can transport warm seawater to the Arctic Circle, change the climate of the Arctic Circle, and affect the temperature and precipitation.

Marine ecological impact: the changes of ocean current temperature and salinity will affect the structure and function of marine ecosystem. Some ocean currents, such as Peru current, can bring nutrient-rich water to the surface and provide nutrients for phytoplankton, thus affecting marine ecology.

Coastline influence: Ocean currents can change the shape and style of the coastline. For example, the Kuroshio in Japan can cause strong waves and wave erosion on the Japanese coast, forming a rugged coastline.

Economic impact: Ocean currents have a far-reaching economic impact on fisheries, shipping and tourism. For example, the fishery of the North Atlantic Ocean current is one of the main economic sources of the Nordic countries, and shipping is also affected by the ocean current.