Meteorologyis a branch of theatmospheric scienceswhich includesatmospheric chemistryandatmospheric physics, with a major focus onweather forecasting. The study of meteorology dates backmillennia, though significant progress in meteorology did not occur until the 18th century. The 19th century saw modest progress in the field afterweather observationnetworks were formed across broad regions. Prior attempts atprediction of weatherdepended on historical data. It was not until after the elucidation of thelaws of physicsand more particularly, the development of the computer, allowing for the automated solution of a great many equations that model the weather, in the latter half of the 20th century that significant breakthroughs in weather forecasting were achieved. An important domain of weather forecasting ismarine weather forecastingas it relates to maritime and coastal safety, in which weather effects also include atmospheric interactions with large bodies of water.
Meteorological phenomenaare observable weather events that are explained by the science of meteorology. Meteorological phenomena are described and quantified by the variables ofEarth's atmosphere:temperature,air pressure,water vapour,mass flow, and the variations and interactions of those variables, and how they change over time. Differentspatial scalesare used to describe and predict weather on local, regional, and global levels.
Meteorology,climatology,atmospheric physics, andatmospheric chemistryare sub-disciplines of theatmospheric sciences. Meteorology andhydrologycompose the interdisciplinary field ofhydrometeorology. The interactions between Earth's atmosphere and its oceans are part of a coupled ocean-atmosphere system. Meteorology has application in many diverse fields such as themilitary,energy production,transport,agriculture, andconstruction.
Dereham (/ˈdɪərəm/), also known as East Dereham, is a town and civil parish in the Breckland District of the English county of Norfolk. It is situated on the A47 road, about 15 miles (25 km) west of the city of Norwich and 25 miles (40 km) east of King's Lynn.
The civil parish has an area of 21.51 km2 (8.31 sq mi) and, in the 2001 census, had a population of 15,659 in 6,941 households; the population at the 2011 census increased to 18,609. Dereham falls within, and is the centre of administration for, Breckland District Council. The town should not be confused with the Norfolk village of West Dereham, which lies about 25 miles (40 km) away.
Since 1983, Dereham has been twinned with the town of Rüthen in North Rhine-Westphalia, Germany. It is also twinned with Caudebec-lès-Elbeuf, France. In spite of the reunification of Germany in 1990, the sign on the A47 at the entrance to Dereham from the Swaffham direction still refers to Rüthen being in West Germany; this sparks periodic comment in the local press.