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Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. [1] On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, [2] [3] just below the stratosphere.
Since the UK is always in or close to the path of the polar front jet stream, frequent changes in pressure and unsettled weather are typical. Many types of weather can be experienced in a single day. The basic climate of the UK annually is wet and cool in winter, spring, and autumn with frequent cloudy skies, and drier and cool to mild in summer.
Microsoft's Aurora system offers global 10-day weather and 5-day air pollution (CO 2, NO, NO 2, SO 2, O 3, and particulates) forecasts with claimed accuracy similar to physics-based models, but at orders-of-magnitude lower cost. Aurora was trained on more than a million hours of data from six weather/climate models. [83] [84]
The global models are run outwards to varying times into the future. The UKMET Unified Model is run six days into the future, [16] the European Centre for Medium-Range Weather Forecasts model is run out to 10 days into the future, [17] while the Global Forecast System model run by the Environmental Modeling Center is run 16 days into the future ...
As of 31 March 2020, the CAIE had decided to guide schools to predict students' grades through evidence like mock examination results. [27] On 30 April 2020, Pearson Edexcel announced that grades for the May/June 2020 exam would be calculated using information from schools.
This page is a list of geography topics. Geography is the study of the world and of the distribution of life on the earth, including human life and the effects of human activity. Geography research addresses both the questions of where, as well as why, geographical phenomena occur. Geography is a diverse field that seeks to understand the world ...
A weather forecasting technique in which a numerical weather model generates a set of multiple (often several dozen) forecasts, each based on a slightly different set of initial atmospheric conditions, intended to provide an indication of the range of possible future states of the atmosphere. If the forecasts are consistent, they are usually ...
The list of England's largest cities or urban areas is open to debate because, although the normal meaning of city is "a continuously built-up urban area", this can be hard to define, particularly because administrative areas in England often do not correspond with the limits of urban development, and many towns and cities have, over the ...