Incorporating State-Dependent Temperature–Salinity Constraints in the Background Error Covariance of Variational Ocean Data Assimilation
@article{Ricci2005IncorporatingST, title={Incorporating State-Dependent Temperature–Salinity Constraints in the Background Error Covariance of Variational Ocean Data Assimilation}, author={Sophie Ricci and Anthony T. Weaver and J{\'e}r{\^o}me Vialard and Philippe Rogel}, journal={Monthly Weather Review}, year={2005}, volume={133}, pages={317-338} }
Abstract Several studies have illustrated how the univariate assimilation of temperature data can have a detrimental effect on the ocean-state variables (salinity, currents, etc.) not directly constrained by the data. In this paper, the authors describe how the salinity adjustment method proposed by Troccoli and Haines can be included as a multivariate temperature–salinity (T–S) constraint within a background-error covariance model for variational data assimilation. The method is applied to a…
Figures from this paper
56 Citations
Using Temperature Salinity Relations in a Global Ocean Implementation of a Multivariate Data Assimilation Scheme
- Environmental Science
- 2007
In this paper results from the application of an ocean data assimilation (ODA) system, combining a multivariate reduced-order optimal interpolator (OI) scheme with a global ocean general circulation…
Ensemble estimation of background‐error variances in a three‐dimensional variational data assimilation system for the global ocean
- Environmental Science
- 2009
This paper studies the sensitivity of global ocean analyses to two flow‐dependent formulations of the background‐error standard deviations (σb) for temperature and salinity in a three‐dimensional…
Evaluation of the S(T) assimilation method with the Argo dataset
- Environmental Science
- 2009
Recent observations from the Argo dataset of temperature and salinity profiles are used to evaluate a series of 3‐year data assimilation experiments in a global ice–ocean general circulation model.…
A multivariate balance operator for variational ocean data assimilation
- Environmental Science
- 2005
It is common in meteorological applications of variational assimilation to specify the error covariances of the model background state implicitly via a transformation from model space where variables…
Salinity Assimilation Using S(T): Covariance Relationships
- Environmental Science
- 2006
Assimilation of salinity into ocean and climate general circulation models is a very important problem. Argo data now provide far more salinity observations than ever before. In addition, a good…
458 Salinity Assimilation using S ( T ) relationships : Part 1 Theory
- Environmental Science
- 2005
Assimilation of salinity into ocean and climate general circulation models is a very important problem. ARGO data now provide far more salinity observations than ever before. In addition a good…
Ensembles of global ocean analyses for seasonal climate prediction: impact of temperature assimilation
- Environmental Science
- 2005
Two sets of ensembles of ocean initial conditions for seasonal climate prediction have been constructed following a strategy that preserves the dynamical balance of the ocean. One set has been…
Effects of Sea Level Data Assimilation by Ensemble Optimal Interpolation and 3D Variational Data Assimilation on the Simulation of Variability in a Tropical Pacific Model
- Environmental Science
- 2011
AbstractSea level anomalies (SLA) from the Ocean Topography Experiment (TOPEX)/Poseidon are assimilated with three-dimensional variational data assimilation (3DVAR) and ensemble optimal interpolation…
Comparison and Sensitivity of ODASI Ocean Analyses in the Tropical Pacific
- Environmental Science
- 2007
Abstract Two global ocean analyses from 1993 to 2001 have been generated by the Global Modeling and Assimilation Office (GMAO) and Geophysical Fluid Dynamics Laboratory (GFDL), as part of the Ocean…
Background error covariance with balance constraints for aerosol species andapplications in variational data assimilation
- Environmental Science
- 2015
Abstract. Balance constraints are important for background error covariance (BEC) in data assimilation to spread information between different variables and produce balance analysis fields. Using…
References
SHOWING 1-10 OF 35 REFERENCES
Use of the Temperature Salinity Relation in a Data Assimilation Context
- Environmental Science
- 1999
Abstract A data analysis using conductivity–temperature–depth (CTD) measurements in the western tropical Pacific is carried out to get an estimate of the timescale over which temperature–salinity…
Salinity Adjustments in the Presence of Temperature Data Assimilation
- Environmental Science
- 2002
Abstract This paper is an evaluation of the role of salinity in the framework of temperature data assimilation in a global ocean model that is used to initialize seasonal climate forecasts. It is…
Retrospective Analysis of the Salinity Variability in the Western Tropical Pacific Ocean Using an Indirect Minimization Approach
- Environmental Science
- 2000
Abstract Empirical orthogonal functions of the combined variability of temperature and salinity have been used as basis functions for the indirect reconstruction of salinity from observations of…
Impact of sea level assimilation on salinity variability in the Western Equatorial Pacific
- Environmental Science
- 2000
Abstract In the primitive equation model for the tropical Pacific at the National Centers for Environmental Prediction, subsurface temperature observations are assimilated. The addition of…
Three- and Four-Dimensional Variational Assimilation with a General Circulation Model of the Tropical Pacific Ocean. Part II: Physical Validation
- Environmental Science
- 2003
Abstract Three- and four-dimensional variational assimilation (3DVAR and 4DVAR) systems have been developed for the Ocean Parallelise (OPA) ocean general circulation model of the Laboratoire…
Three- and Four-Dimensional Variational Assimilation with a General Circulation Model of the Tropical Pacific Ocean. Part I: Formulation, Internal Diagnostics, and Consistency Checks
- Environmental Science
- 2003
Abstract Three- and four-dimensional variational assimilation (3DVAR and 4DVAR) systems have been developed for the Ocean Parallelise (OPA) ocean general circulation model (OGCM) of the Laboratoire…
A Global Oceanic Data Assimilation System
- Environmental Science
- 1989
Abstract A global oceanic four-dimensional data assimilation system has been developed for use in initializing coupled ocean–atmosphere general circulation models and many other applications. The…
Using satellite-derived sea level and temperature profiles for determining the salinity variability. A new approach
- Environmental Science
- 2000
We propose a new approach to estimate the vertical variability of the salinity field. The method is based on combined vertical modes of temperature T and salinity S and reconstructs salinity profiles…
The Effect of Salinity on Tropical Ocean Models
- Environmental Science
- 1988
Abstract The effect of horizontal salinity gradients on the tropical ocean circulation has not previously been evaluated. It is shown that there are noticeable differences between the dynamic height…
A modeling study of salinity variability and its effects in the tropical Pacific Ocean during the 1993–1999 period
- Environmental Science
- 2002
[1] This paper investigates the mechanisms of near-surface salinity variability in the tropical Pacific during the 1993–1999 period, including the 1997–1998 El Nino. The role of salinity in the…