Tõusuvoolu

Tõusuvoolu is an Estonian term that translates to "upcurrent" or "rising current." It is most commonly used in the context of meteorology and oceanography to describe an upward movement of air or water. In meteorology, tõusuvoolu refers to the ascending currents of air that are crucial for the formation of clouds and precipitation. These currents can be driven by various factors, including solar heating of the Earth's surface (convection), the interaction of air masses, or the lifting of air over mountainous terrain.

In oceanography, tõusuvoolu describes the upward movement of colder, nutrient-rich water from deeper parts of the ocean towards the surface. This phenomenon, also known as upwelling, is vital for marine ecosystems as it supports phytoplankton growth, which forms the base of the food web. Areas of strong tõusuvoolu are often characterized by high biological productivity and abundant marine life, making them important fishing grounds. The term can also be used more broadly to describe any rising movement or trend, such as an increase in popularity or a surge in economic activity.