air masses and fronts
What are changes in weather cause by?
air masses
What is a weather map?
a map those the movement of weather.
what is a surface current?
horizontal and stream like movements in the water found near the surface
what are deep currents?
movement of ocean water under the surface
what is an air mass?
a large volume of air with a certain temperature and moisture content.
How is a high pressure represented on the map?
Capital H
surface currents can be as deep and long as?
several thousand kilometers
when do deep currents form?
when the density of the water increases
what do warm air masses bring in the summer?
They bring heat, humidity, hurricanes and thunderstorm
Capital L
what is one of the longest surface currents in the world?
the gulf stream
whats one way to increase the density of ocean water?
decreasing water temperatures
what is a front?
The location where two or more ari masses meet
what kind of weather can low pressure bring
cold and snowy weather
what are three factors that affect surface currents?
global winds, Coriolis effect and continental deflection
what is the deepest and densest water called?
Antarctic bottom water
What is a front that forms when a cold air mass and a warm air mass move together?
Stationary Front
sunny and warm weather are caused by what kind of pressure?
High pressure
how do global winds affect surface currents?
wind blows across the surface of the earths pushing water around earths surfaces causes surface currents
Decreasing water temperatures and increasing salinity through freezing and evaporation show what?
water density increasing