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QuikSCAT measurements and ECMWF wind forecasts - an explorative study

Malmberg, Anders LU (2005) In Preprint without journal information
Abstract
The aim of this paper is to study the covariance structure for the difference between satellite measurements and meteorological forecasts of near-surface ocean winds. This type of covariance enters in assimilation techniques such as Kalman filtering.



I all, six residual fields are studied. Us of a Box-Cox transformation leads to approximately symmetrically distributed residual wind speed fields. For these, two isotropic covariance models are explored, both belonging to the Matérn family. Substantial variations in the parameter estimates for the different fields are found.



Analytical expressions for the covariance functions of the original fields are hard to obtain and hence a simulation based approach... (More)
The aim of this paper is to study the covariance structure for the difference between satellite measurements and meteorological forecasts of near-surface ocean winds. This type of covariance enters in assimilation techniques such as Kalman filtering.



I all, six residual fields are studied. Us of a Box-Cox transformation leads to approximately symmetrically distributed residual wind speed fields. For these, two isotropic covariance models are explored, both belonging to the Matérn family. Substantial variations in the parameter estimates for the different fields are found.



Analytical expressions for the covariance functions of the original fields are hard to obtain and hence a simulation based approach is suggested. However, these simulated fields do not resemble the original residual fields very well. Hence, the isotropic covariance model should be reconsidered in further research and the present weather conditions might be considered in an extended dynamical model. (Less)
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organization
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Contribution to journal
publication status
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in
Preprint without journal information
issue
2005:11
publisher
Manne Siegbahn Institute
ISSN
0348-7911
language
English
LU publication?
yes
id
b38ae1e4-704c-4c39-96cb-45714f0c5ae0 (old id 930215)
date added to LUP
2008-01-15 15:21:58
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2016-04-16 06:23:53
@article{b38ae1e4-704c-4c39-96cb-45714f0c5ae0,
  abstract     = {The aim of this paper is to study the covariance structure for the difference between satellite measurements and meteorological forecasts of near-surface ocean winds. This type of covariance enters in assimilation techniques such as Kalman filtering.<br/><br>
<br/><br>
I all, six residual fields are studied. Us of a Box-Cox transformation leads to approximately symmetrically distributed residual wind speed fields. For these, two isotropic covariance models are explored, both belonging to the Matérn family. Substantial variations in the parameter estimates for the different fields are found.<br/><br>
<br/><br>
Analytical expressions for the covariance functions of the original fields are hard to obtain and hence a simulation based approach is suggested. However, these simulated fields do not resemble the original residual fields very well. Hence, the isotropic covariance model should be reconsidered in further research and the present weather conditions might be considered in an extended dynamical model.},
  author       = {Malmberg, Anders},
  issn         = {0348-7911},
  language     = {eng},
  number       = {2005:11},
  publisher    = {Manne Siegbahn Institute},
  series       = {Preprint without journal information},
  title        = {QuikSCAT measurements and ECMWF wind forecasts - an explorative study},
  year         = {2005},
}