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Atlantic Meridional Overturning Circulation

Generalised model of thermohaline circulation, adapted from NASA.

The Atlantic Meridional Overturning Circulation (AMOC) is a system of currents in the Atlantic Ocean, including the Gulf Stream that circulates a vast amount of heat from the tropics towards the North Pole disseminating the cold, saline, dense waters towards the Tropics and even further south towards the South Pole. The figure above captures that in a generalised worldwide model of thermohaline (thermo- referring to temperature and –haline referring to salt content) circulation.

The Paul Hudson Weather Show

Paul Hudson in the BBC studio during the Weather Show

In the time I’ve worked at the BBC I’ve made programmes about American blues musicians performing in the former Soviet Union, young offenders being rehabilitated through the arts, Royal Navy convoys protecting NATO peace conferences. I’ve interviewed high profile recording artists, read news bulletins and reported live on breaking news stories. And whatever the inherent difficulties of these assignments were, they were at least tangible and there were facts - a story to tell.

World Meteorological Day: World Meteorological Day is a yearly event, celebrated on 23 March.

World Meteorological Day is a yearly event, celebrated on 23 March. It commemorates the the entry into force in 1950 of the convention that created the World Meteorological Organization. The day also highlights the huge contribution that National Meteorological and Hydrological Services make to the safety and well-being of society.

This year's World Meteorological Day theme is “Weather and climate: engaging youth.""

The following resources are available for supporting World Meteorological Day celebrations around the world:

Measuring Wind Speed : What is anemometer?

Wind is simply movement of air, but sometimes this movement can be pretty fast! Those of us in the South of England have recent memories of the St Jude’s Day storm on 28 October, and the disruption caused by gusts of up to 99mph. As well as meteorologists, lots of other people are interested in how fast the wind is blowing, ranging from sportsmen such as parachutists and sailors, to those concerned with hazardous winds, such as air traffic controllers and crane operators. But how do we measure its speed?

Winds of Change

Image: Some of the local wind names and their location. 

In many areas of the world, regional conditions give rise to winds that have been identified by the locals as having a special effect or occurring during a particular season. Quite often these winds are given a name by local inhabitants.

Aurora Borealis

The Aurora Borealis, also known as the Northern Lights, and Aurora Australis (Southern Lights) in the Southern Hemisphere, are a spectacular natural phenomenon. They light up a night sky, dancing around in fantastic colours. There are few places in the Northern Hemisphere where you can see them, but they can be elusive if you are really unlucky. Here we explain the science behind the Northern Lights and share few tips on how to maximise your chances of witnessing this wonderful spectacle.