Assimilation of standard and targeted observations within the unstable subspace of the observation-analysis-forecast cycle system

Trevisan and Uboldi has shown that the flow-dependent instabilities that develop within an observation-analysis-forecast (OAF) cycle and that are responsible for the background error can be exploited in a very simple way to assimilate observations. The basic idea is that, in order to minimize the an...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the atmospheric sciences 2004, Vol.61 (1), p.103-113
Main Authors: TREVISAN, Anna, UBOLDI, Francesco
Format: Article
Language:English
Subjects:
Analysis
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Weather forecasting
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Trevisan and Uboldi has shown that the flow-dependent instabilities that develop within an observation-analysis-forecast (OAF) cycle and that are responsible for the background error can be exploited in a very simple way to assimilate observations. The basic idea is that, in order to minimize the analysis and forecast errors, the analysis increment must be confined to the unstable subspace of the OAF cycle solution. The analysis solution here formally coincides with that of the classical three-dimensional variational solution with the background error covariance matrix estimated in the unstable subspace.
ISSN:0022-4928
1520-0469
DOI:10.1175/1520-0469(2004)061<0103:AOSATO>2.0.CO;2