Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles (Articolo in rivista) (literal)

Anno

• 2010-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.5194/acp-10-3131-2010 (literal)

Alternative label

• Ceccherini S. and M. Ridolfi (2010)
  Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles
  in Atmospheric chemistry and physics (Online)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Ceccherini S. and M. Ridolfi (literal)

Pagina inizio

• 3131 (literal)

Pagina fine

• 3139 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://www.atmos-chem-phys.net/10/3131/2010/acp-10-3131-2010.html (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 10 (literal)

Rivista

• Atmospheric chemistry and physics (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 9 (literal)

Note

• Scopu (literal)
• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• [SC] Istituto di Fisica Applicata \"Nello Carrara\" (IFAC) del Consiglio Nazionale delle Ricerche (CNR), Firenze, Italy [MR] Dipartimento di Fisica, Universit`a di Bologna, Bologna, Italy (literal)

Titolo

• Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles (literal)

Abstract

• The variance-covariance matrix (VCM) and the averaging kernel matrix (AKM) are widely used tools to characterize atmospheric vertical profiles retrieved from remote sensing measurements. Accurate estimation of these quantities is essential for both the evaluation of the quality of the retrieved profiles and for the correct use of the profiles themselves in subsequent applications such as data comparison, data assimilation and data fusion. We propose a new method to estimate the VCM and AKM of vertical profiles retrieved using the Levenberg-Marquardt iterative technique. We apply the new method to the inversion of simulated limb emission measurements. Then we compare the obtained VCM and AKM with those resulting from other methods already published in the literature and with accurate estimates derived using statistical and numerical estimators. The proposed method accounts for all the iterations done in the inversion and provides the most accurate VCM and AKM. Furthermore, it correctly estimates the VCM and the AKM also if the retrieval iterations are stopped when a physically meaningful convergence criterion is fulfilled, i.e. before achievement of the numerical convergence at machine precision. The method can be easily implemented in any Levenberg-Marquardt iterative retrieval scheme, either constrained or unconstrained, without significant computational overhead. (literal)

Prodotto di

• Institute of applied physics \"Nello Carrara\" (IFAC) (Istituto)
• Sviluppo ed integrazione di tecnologie attive e passive per il sondaggio dell'atmosfera (TA.P06.002.002) (Modulo)

Autore CNR

• SIMONE CECCHERINI (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of applied physics \"Nello Carrara\" (IFAC) (Istituto)
• Sviluppo ed integrazione di tecnologie attive e passive per il sondaggio dell'atmosfera (TA.P06.002.002) (Modulo)

Autore CNR di

• SIMONE CECCHERINI (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Atmospheric chemistry and physics (Rivista)

Insieme di parole chiave di

• Keywords of "Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles" (Insieme di parole chiave)