Matthew Carrier
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View article: Wavelet ocean data assimilation
Wavelet ocean data assimilation Open
View article: Optimally Distributed Receiver Placements Versus an Environmentally Aware Source: New England Shelf Break Acoustics Signals and Noise Experiment
Optimally Distributed Receiver Placements Versus an Environmentally Aware Source: New England Shelf Break Acoustics Signals and Noise Experiment Open
This article describes the results of the Spring of 2021 New England Shelf Break Acoustics (NESBA) Signals and Noise experiment as they pertain to the optimization of a field of passive receivers versus an environmentally aware source with…
View article: Impact of spatially-dense in-situ observations on ocean forecasts of mixed layer and thermocline depth
Impact of spatially-dense in-situ observations on ocean forecasts of mixed layer and thermocline depth Open
Ocean models, such as the Navy Coastal Ocean Model (NCOM), rely on ocean observations through data assimilation to predict the evolution of ocean phenomena accurately. The accuracy is highly dependent on the type and quantity of observatio…
View article: Nesting and data assimilation considerations in regional operational ocean forecasting
Nesting and data assimilation considerations in regional operational ocean forecasting Open
A combination of nesting and data assimilation setups is explored for lowering analysis and forecast errors in a regional operational ocean model. Original downscaling from the global model and applying 3dVar to a regional model produce un…
View article: Observing System Simulation Experiments Today and Tomorrow
Observing System Simulation Experiments Today and Tomorrow Open
6 month embargo; published online: 29 March 2022
View article: Use of Observing System Simulation Experiments in the United States
Use of Observing System Simulation Experiments in the United States Open
The NOAA Science Advisory Board appointed a task force to prepare a white paper on the use of observing system simulation experiments (OSSEs). Considering the importance and timeliness of this topic and based on this white paper, here we b…
View article: An ensemble of perturbed analyses to approximate the analysis error covariance in 4dvar
An ensemble of perturbed analyses to approximate the analysis error covariance in 4dvar Open
The analysis error covariance is not readily available from four-dimensional variational (4dvar) data assimilation methods, not because of the complexity of mathematical derivation, but rather its computational expense. A number of techniq…
View article: A Multiscale Approach to High-Resolution Ocean Profile Observations within a 4DVAR Analysis System
A Multiscale Approach to High-Resolution Ocean Profile Observations within a 4DVAR Analysis System Open
Most ocean data assimilation systems are tuned to process and assimilate observations to constrain features on the order of the mesoscale and larger. Typically this involves removal of observations or computing averaged observations. This …
View article: Operational Ocean Data Assimilation
Operational Ocean Data Assimilation Open
Operational ocean data assimilation is necessary to continually correct and maintain accurate ocean forecasts. The primary GODAE objective was prediction of mesoscale eddies, and the science community has successfully addressed this issue.…
View article: A comparison of two preconditioner algorithms within the representer-based four-dimensional variational data assimilation system for the Navy coastal ocean model
A comparison of two preconditioner algorithms within the representer-based four-dimensional variational data assimilation system for the Navy coastal ocean model Open
Four-dimensional variational (4D-Var) data assimilation for operational systems requires the solution of large linear systems that are poorly conditioned in general. In addition to efficient iterative solvers for linear systems, using a go…
View article: Do Assimilated Drifter Velocities Improve Lagrangian Predictability in an Operational Ocean Model?
Do Assimilated Drifter Velocities Improve Lagrangian Predictability in an Operational Ocean Model? Open
The Lagrangian predictability of general circulation models is limited by the need for high-resolution data streams to constrain small-scale dynamical features. Here velocity observations from Lagrangian drifters deployed in the Gulf of Me…