O
Readings of the weather and wider environment. These are taken under the ocean, at ground level and at different heights in the atmosphere. They include air pressure, temperature, wind speed, rainfall, wave height, tides, currents, ozone levels and many more. Many observations are made by instruments, such as thermometers to record temperature. Some need human assessment, such as identifying cloud type.
When a cold front overtakes a warm front, joining up with the cool air ahead of it. This cuts off the warm air from the ground, pushing it upwards.
The coastal waters zone 12–60 nautical miles from the coast.
Wind blowing from the land out to sea.
Wind blowing from sea onto land.
Occurs where the flow of air is forced up and over physical barriers such as mountains.
Sky completely covered with cloud.
Cloud expected to cover 100% of the sky for most the day.
A shallow water constituent with a speed that is a multiple of the speed of one of the basic constituents of the tide-producing force.
One of the gases that make up the atmosphere. Each ozone molecule is made up of 3 oxygen atoms.
The ozone layer in the atmosphere absorbs most of the UV radiation from the sun before it reaches the Earth.