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• Numerical_weather_prediction abstract "Numerical weather prediction uses mathematical models of the atmosphere and oceans to predict the weather based on current weather conditions. Though first attempted in the 1920s, it was not until the advent of computer simulation in the 1950s that numerical weather predictions produced realistic results. A number of global and regional forecast models are run in different countries worldwide, using current weather observations relayed from radiosondes or weather satellites as inputs to the models.Mathematical models based on the same physical principles can be used to generate either short-term weather forecasts or longer-term climate predictions; the latter are widely applied for understanding and projecting climate change. The improvements made to regional models have allowed for significant improvements in tropical cyclone track and air quality forecasts; however, atmospheric models perform poorly at handling processes that occur in a relatively constricted area, such as wildfires. Manipulating the vast datasets and performing the complex calculations necessary to modern numerical weather prediction requires some of the most powerful supercomputers in the world. Even with the increasing power of supercomputers, the forecast skill of numerical weather models extends to about only six days. Factors affecting the accuracy of numerical predictions include the density and quality of observations used as input to the forecasts, along with deficiencies in the numerical models themselves. Although post-processing techniques such as model output statistics (MOS) have been developed to improve the handling of errors in numerical predictions, a more fundamental problem lies in the chaotic nature of the partial differential equations used to simulate the atmosphere. It is impossible to solve these equations exactly, and small errors grow with time (doubling about every five days). In addition, the partial differential equations used in the model need to be supplemented with parameterizations for solar radiation, moist processes (clouds and precipitation), heat exchange, soil, vegetation, surface water, and the effects of terrain. In an effort to quantify the large amount of inherent uncertainty remaining in numerical predictions, ensemble forecasts have been used since the 1990s to help gauge the confidence in the forecast, and to obtain useful results farther into the future than otherwise possible. This approach analyzes multiple forecasts created with an individual forecast model or multiple models.".
• Numerical_weather_prediction thumbnail AtmosphericModelSchematic.png?width=300.
• Numerical_weather_prediction wikiPageExternalLink READYcmet.php.
• Numerical_weather_prediction wikiPageExternalLink www.ecmwf.int.
• Numerical_weather_prediction wikiPageExternalLink weather-forecasting.
• Numerical_weather_prediction wikiPageExternalLink s2387.htm.
• Numerical_weather_prediction wikiPageExternalLink 2013029_supercomputers.html.
• Numerical_weather_prediction wikiPageExternalLink FNMOC.
• Numerical_weather_prediction wikiPageID "1505381".
• Numerical_weather_prediction wikiPageRevisionID "606161103".
• Numerical_weather_prediction hasPhotoCollection Numerical_weather_prediction.
• Numerical_weather_prediction subject Category:Climate_modeling.
• Numerical_weather_prediction subject Category:Computational_science.
• Numerical_weather_prediction subject Category:Mathematical_science_occupations.
• Numerical_weather_prediction subject Category:Numerical_climate_and_weather_models.
• Numerical_weather_prediction subject Category:Weather_prediction.
• Numerical_weather_prediction type Abstraction100002137.
• Numerical_weather_prediction type Act100030358.
• Numerical_weather_prediction type Activity100407535.
• Numerical_weather_prediction type Event100029378.
• Numerical_weather_prediction type MathematicalScienceOccupations.
• Numerical_weather_prediction type Occupation100582388.
• Numerical_weather_prediction type PsychologicalFeature100023100.
• Numerical_weather_prediction type YagoPermanentlyLocatedEntity.
• Numerical_weather_prediction comment "Numerical weather prediction uses mathematical models of the atmosphere and oceans to predict the weather based on current weather conditions. Though first attempted in the 1920s, it was not until the advent of computer simulation in the 1950s that numerical weather predictions produced realistic results.".
• Numerical_weather_prediction label "Modelli numerici di previsione meteorologica".
• Numerical_weather_prediction label "Modelo numérico de predicción meteorológica".
• Numerical_weather_prediction label "Numerical weather prediction".
• Numerical_weather_prediction label "Numerische Wettervorhersage".
• Numerical_weather_prediction label "Numeryczna prognoza pogody".
• Numerical_weather_prediction label "Previsão numérica do tempo".
• Numerical_weather_prediction label "Prévision numérique du temps".
• Numerical_weather_prediction label "Численный прогноз погоды".
• Numerical_weather_prediction label "التنبؤ الرقمي للطقس".
• Numerical_weather_prediction label "数値予報".
• Numerical_weather_prediction label "數值天氣預報".
• Numerical_weather_prediction sameAs Numerische_Wettervorhersage.
• Numerical_weather_prediction sameAs Αριθμητική_πρόγνωση_καιρού.
• Numerical_weather_prediction sameAs Modelo_numérico_de_predicción_meteorológica.
• Numerical_weather_prediction sameAs Prévision_numérique_du_temps.
• Numerical_weather_prediction sameAs Modelli_numerici_di_previsione_meteorologica.
• Numerical_weather_prediction sameAs 数値予報.
• Numerical_weather_prediction sameAs Numeryczna_prognoza_pogody.
• Numerical_weather_prediction sameAs Previsão_numérica_do_tempo.
• Numerical_weather_prediction sameAs m.056kj9.
• Numerical_weather_prediction sameAs Q837552.
• Numerical_weather_prediction sameAs Q837552.
• Numerical_weather_prediction sameAs Numerical_weather_prediction.
• Numerical_weather_prediction wasDerivedFrom Numerical_weather_prediction?oldid=606161103.
• Numerical_weather_prediction depiction AtmosphericModelSchematic.png.
• Numerical_weather_prediction isPrimaryTopicOf Numerical_weather_prediction.