User:Milton Beychok/Sandbox
The Met Office (originally an abbreviation for Meteorological Office, but now the official name in itself), which has its headquarters at Exeter in Devon, is the United Kingdom's national weather service and a subsidiary of the Ministry of Defence. Part of the Met Office complex in Exeter is the Met Office College, which handles the training for internal personnel and many forecasters from around the world.
History
Established in 1854 as a small department within the Board of Trade as a service to mariners. The loss of the passenger vessel the Royal Charter and 459 lives off the coast of Anglesey in a violent storm in October 1859 led to the first gale warning service. In 1861,a network of 15 coastal stations was established from which visual gale warnings could be provided for ships at sea.
The development of the electric telegraph in the 1870's led to the more rapid dissemination of warnings and also led to the development of an observational network which could then be used to provide synoptic analyses.
In 1879 the Met Office started providing forecast to newspapers.
Following the First World War the Met Office later became part of the Air Ministry in 1920. In 1936 the Met Office split with services to the Royal Navy being provided by their own forecasting services.
It currently holds a quasi-governmental role, being required to act commercially but also remaining an executive agency of the Ministry of Defence. A little known branch of the Met Office known as the Mobile Met Unit (MMU) accompany forward units in times of conflict advising the armed forces of the prevailing conditions for battle, particularly the RAF. The Hadley Centre for Climate Prediction and Research is also part of the Met Office.
Locations
_headquarters.jpg)
In 2003 the Met Office moved its headquarters to Exeter, in Devon from its previous location of Bracknell in Berkshire and it has a worldwide presenceTemplate:Ndash including a forecasting centre in Aberdeen and offices in Gibraltar and on the Falklands. Other outposts lodge in establishments such as the Joint Centre for Mesoscale Meteorology (JCMM) at University of Reading in Berkshire, the Joint Centre for Hydro-Meteorological Research (JCHMR) site at Wallingford in Oxfordshire and there is also a Met Office presence at many Army and Air Force bases within the UK and abroad. Royal Navy weather forecasts are generally provided by naval officers, not Met Office personnel.
Forecasts
The Shipping Forecast
One of the British stalwarts, the Shipping Forecast, is produced by the Met Office and broadcast on BBC Radio 4. The Shipping Forecast has long been of real interest to, and vital to the safety of, mariners traversing the sea areas around the British Isles and its broadcast on radio is still avidly listened to. Less vitally, the Shipping Forecast has been the subject of both books and song lyrics.
Weather Forecasting and Warnings
At the Met Office, they have the responsibility to issue severe weather warnings for the United Kingdom through the National Severe Weather Warning Service (NSWWS). These are weather events that may affect transport infrastructure and endanger people's lives. In March 2008, the system was improved and a new stage of warning was introduced, the 'Advisory'.[1]
Their main role is to produce forecast models by gathering all the information from satellites in space and observations on earth, then processing it using supercomputers which produce a variety of models, collectively known as the Unified Model. If necessary, forecasters may then make adjustments to the forecasts. This main bulk of data is then passed on to companies who acquire it. In particular, two of the main media companies, the BBC and ITV produce forecasts using the Met Office's data. At the BBC Weather Centre, they are continuously updated on the latest information arriving by computer, or by fax and e-mail.[2][3] The BBC's new graphics are used on all of their television weather broadcasts, but ITV use animated weather symbols. This is mainly how the public are informed of weather events which may affect day-to-day life.
World Area Forecast Centre
The Met Office is also one of only two World Area Forecast Centres or WAFCs, and is referred to as WAFC London. The other WAFC is located in Missouri, USA but known as WAFC Washington. WAFC data are used daily to safely and economically route aircraft, particularly on long-haul journeys. The data provide details of wind speed and direction, air temperature, cloud type and tops, and other features of interest to the aviation community, such as volcanic ash eruptions.
Air Quality
The Met Office issues air quality forecasts made using NAME, the Met Office's medium-to-long-range atmospheric dispersion model. It was originally developed as a nuclear accident model following the Chernobyl accident in 1986, but has since evolved into an all-purpose dispersion model capable of predicting the transport, transformation and deposition of a wide class of airborne materials. NAME is used operationally by the Met Office as an emergency response model as well as for routine air quality forecasting.
In the air quality forecasts, the level of pollution is described either as an index (ranging from 1 to 10) or as a banding (low, moderate, high or very high). These levels are based on the health effects of each pollutant as shown just below.
| Index | Banding | Health Effect |
|---|---|---|
| 1–3 |
Low |
Effects are unlikely to be noticed even by individuals who know they are sensitive to air pollutants. |
| 4–6 |
Moderate |
Mild effects, unlikely to require action, may be noticed amongst sensitive individuals. |
| 7-9 |
High |
Significant effects may be noticed by sensitive individuals and action to avoid or reduce these effects may be needed (e.g. reducing exposure by spending less time in polluted areas outdoors). Asthmatics will find that their 'reliever' inhaler is likely to reverse the effects on the lung. |
| 10 |
Very High | The effects on sensitive individuals described for 'High' levels of pollution may worsen. |
The forecast is produced for a number of different pollutants and their typical health effects are shown in the following table.
| Pollutant | Health Effects at High Level |
|---|---|
| Nitrogen dioxide Ozone Sulphur dioxide |
These gases irritate the airways of the lungs, increasing the symptoms of those suffering from lung diseases. |
| Particulates |
Fine particles can be carried deep into the lungs where they can cause inflammation and a worsening of heart and lung diseases |