Atmosphere, Ocean Currents, and Winds Vocabulary

thermal energy

The energy that comes from the heat of the atmosphere and oceans. It is transferred through conduction, convection, and radiation, influencing weather patterns and climate.

convection

The transfer of heat through the movement of fluids, where warmer, less dense areas rise and cooler, denser areas sink, creating circulation patterns.

density

A measure of mass per unit volume, indicating how closely packed the particles of a substance are. It plays a key role in determining buoyancy and fluid behavior.

salinity

The concentration of salt in water, typically measured in parts per thousand (ppt). Salinity affects the density and buoyancy of seawater, influencing ocean currents and marine life.

weather

The state of the atmosphere at a specific time and place, including factors such as temperature, humidity, precipitation, wind speed, and visibility. Weather can vary greatly from day to day and is typically short-term compared to climate.

climate

The long-term average of weather conditions in a particular region, including patterns of temperature, humidity, wind, and precipitation over extended periods.

Gulf Stream

A powerful warm ocean current in the Atlantic Ocean that originates in the Gulf of Mexico and flows along the eastern coast of the United States, influencing climate and weather patterns.

Jet Stream

A fast flowing, narrow air current in the atmosphere that moves from west to east, typically found near the tropopause and influencing weather patterns and systems.

atmosphere

The layer of gases surrounding Earth, essential for weather and climate, composed mainly of nitrogen and oxygen.

troposphere

The lowest layer of the atmosphere, where weather occurs and temperature decreases with altitude. It extends from the Earth's surface to about 8 to 15 kilometers high.

stratosphere

The layer of the atmosphere above the troposphere, characterized by a temperature increase with altitude and the presence of the ozone layer.

mesosphere

The layer of the atmosphere above the stratosphere, where temperature decreases with altitude and is known for the occurrence of meteors burning up upon entry.

thermosphere

The layer of the atmosphere above the mesosphere, characterized by high temperatures due to the absorption of solar radiation and the presence of ionized gases.

exosphere

The outermost layer of the atmosphere, located above the thermosphere, where the atmosphere is very thin and merges with outer space, containing very few particles.

sea breeze

A local wind that occurs during the day when cooler air from the sea moves inland to replace rising warm air over the land.

land breeze

A local wind that occurs at night when cooler air from the land moves out to the sea, replacing rising warm air over the water.

doldrums

A region of the ocean near the equator characterized by low wind speeds and often calm conditions, resulting from the convergence of trade winds.

trade winds

The prevalent easterly winds found in the tropics, blowing from the subtropical high-pressure areas towards the equator, affecting weather patterns and ocean currents.

prevailing westerlies

Prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude

Polar Easterlies

The dry, cold prevailing winds that blow around the high-pressure areas of the polar highs at the North and South poles.

greenhouse effect

The process by which certain gases in the Earth’s atmosphere trap heat, preventing it from escaping into space, thus warming the planet.

ozone

A gas composed of three oxygen atoms, which forms a layer in the Earth’s stratosphere that protects against harmful ultraviolet radiation from the sun.

energy budget

The balance between the energy received from the sun and the energy radiated back to space, determining the Earth’s climate.

specific heat capacity

The amount of heat energy required to raise the temperature of one kilogram of a substance by one degree Celsius.

ultra violet radiation

Electromagnetic radiation with a wavelength shorter than visible light and longer than X-rays, which can cause skin damage and increase the risk for cancer.