The role of model and initial condition error in numerical weather forecasting investigated with an observing system simulation experiment.
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| Title: | The role of model and initial condition error in numerical weather forecasting investigated with an observing system simulation experiment. |
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| Authors: | Privé, Nikki C.1,2 (AUTHOR) Nikki.Prive@nasa.gov, Errico, Ronald M.1,2 (AUTHOR) |
| Source: | Tellus: Series A. 2013, Vol. 65, p1-N.PAG. 18p. |
| Subjects: | Numerical weather forecasting, Computer simulation of weather forecasting, Data analysis, Meteorological observations, United States. National Aeronautics & Space Administration |
| Abstract: | A series of experiments that explore the roles of model and initial condition error in numerical weather prediction are performed using an observing system simulation experiment (OSSE) framework developed at the National Aeronautics and Space Administration Global Modeling and Assimilation Office (NASA/ GMAO). The use of an OSSE allows the analysis and forecast errors to be explicitly calculated, and different hypothetical observing networks can be tested with ease. In these experiments, both a full global OSSE framework and an 'identical twin' OSSE setup are used to compare the behaviour of the data assimilation system (DAS) and evolution of forecast skill with and without model error. The initial condition error is manipulated by varying the distribution and quality of the observing network and the magnitude of observation errors. The results show that model error has a strong impact on both the quality of the analysis field and the evolution of forecast skill, including both systematic and unsystematic model error components. With a realistic observing network, the analysis state retains a significant quantity of error due to systematic model error. If errors of the analysis state are minimised, model error acts to rapidly degrade forecast skill during the first 24-48 hours of forward integration. In the presence of model error, the impact of observation errors on forecast skill is small, but in the absence of model error, observation errors cause a substantial degradation of the skill of medium-range forecasts. [ABSTRACT FROM AUTHOR] |
| Copyright of Tellus: Series A is the property of Stockholm University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 95950005 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The role of model and initial condition error in numerical weather forecasting investigated with an observing system simulation experiment. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Privé%2C+Nikki+C%2E%22">Privé, Nikki C.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> Nikki.Prive@nasa.gov</i><br /><searchLink fieldCode="AR" term="%22Errico%2C+Ronald+M%2E%22">Errico, Ronald M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Tellus%3A+Series+A%22">Tellus: Series A</searchLink>. 2013, Vol. 65, p1-N.PAG. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Numerical+weather+forecasting%22">Numerical weather forecasting</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation+of+weather+forecasting%22">Computer simulation of weather forecasting</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Meteorological+observations%22">Meteorological observations</searchLink><br /><searchLink fieldCode="DE" term="%22United+States%2E+National+Aeronautics+%26+Space+Administration%22">United States. National Aeronautics & Space Administration</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A series of experiments that explore the roles of model and initial condition error in numerical weather prediction are performed using an observing system simulation experiment (OSSE) framework developed at the National Aeronautics and Space Administration Global Modeling and Assimilation Office (NASA/ GMAO). The use of an OSSE allows the analysis and forecast errors to be explicitly calculated, and different hypothetical observing networks can be tested with ease. In these experiments, both a full global OSSE framework and an 'identical twin' OSSE setup are used to compare the behaviour of the data assimilation system (DAS) and evolution of forecast skill with and without model error. The initial condition error is manipulated by varying the distribution and quality of the observing network and the magnitude of observation errors. The results show that model error has a strong impact on both the quality of the analysis field and the evolution of forecast skill, including both systematic and unsystematic model error components. With a realistic observing network, the analysis state retains a significant quantity of error due to systematic model error. If errors of the analysis state are minimised, model error acts to rapidly degrade forecast skill during the first 24-48 hours of forward integration. In the presence of model error, the impact of observation errors on forecast skill is small, but in the absence of model error, observation errors cause a substantial degradation of the skill of medium-range forecasts. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Tellus: Series A is the property of Stockholm University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=95950005 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3402/tellusa.v65i0.21740 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Numerical weather forecasting Type: general – SubjectFull: Computer simulation of weather forecasting Type: general – SubjectFull: Data analysis Type: general – SubjectFull: Meteorological observations Type: general – SubjectFull: United States. National Aeronautics & Space Administration Type: general Titles: – TitleFull: The role of model and initial condition error in numerical weather forecasting investigated with an observing system simulation experiment. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Privé, Nikki C. – PersonEntity: Name: NameFull: Errico, Ronald M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: 2013 Type: published Y: 2013 Identifiers: – Type: issn-print Value: 02806495 Numbering: – Type: volume Value: 65 Titles: – TitleFull: Tellus: Series A Type: main |
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