Article (Scientific journals)
A method to generate fully multi-scale optimal interpolation by combining efficient single process analyses, illustrated by a dineof analysis spiced with a local optimal interpolation
Beckers, Jean-Marie; Barth, Alexander; Tomazic, Igor et al.
2014In Ocean Science, 10 (5), p. 845-862
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Keywords :
interpolation; DINEOF
Abstract :
[en] We present a method in which the optimal interpolation of multi-scale processes can be untangled into a succession of simpler interpolations. First, we prove how the optimal analysis of a superposition of two processes can be obtained by different mathematical formulations involving iterations and analysis focusing on a single process. From the 5 different mathematical equivalent formulations we then select the most efficient ones by analyzing the behavior of the different possibilities in a simple and well controlled test case. The clear guidelines deduced from this experiment are then applied in a real situation in which we combine large-scale analysis of hourly SEVIRI satellite images using DINEOF with a local optimal interpolation using a Gaussian covariance. It is 10 shown that the optimal combination indeed provides the best reconstruction and can therefore be exploited to extract the maximum amount of useful information from the original data
Disciplines :
Earth sciences & physical geography
Author, co-author :
Beckers, Jean-Marie  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Barth, Alexander  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Tomazic, Igor ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Alvera Azcarate, Aïda  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Language :
English
Title :
A method to generate fully multi-scale optimal interpolation by combining efficient single process analyses, illustrated by a dineof analysis spiced with a local optimal interpolation
Publication date :
2014
Journal title :
Ocean Science
ISSN :
1812-0784
eISSN :
1812-0792
Publisher :
European Geosciences Union
Volume :
10
Issue :
5
Pages :
845-862
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 April 2014

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