Assimilation (tentatives d’)

Data Assimilation

Data assimilation refers to the statistical techniques used to combine numerical and statistical models with observations to give an improved estimate of the state of a system or process. Typically a data assimilation problem has a sequential aspect where data as it becomes available over time is used to update the state or parameters of a dynamical system. Data assimilation is usually distingu...

Grammatical Assimilation

Unhealthy Assimilation:

It is well documented that immigrants are in better health upon arrival in the United States than their American counterparts, but that this health advantage erodes over time. We study the potential determinants of this “healthy immigrant effect”, with a particular focus on the tendency of immigrants to converge to unhealthy American BMI levels. Using data from the National Health Interview Sur...

A 3-D variational assimilation scheme in coupled transport-biogeochemical models: Forecast of Mediterranean biogeochemical properties

[1] Increasing attention is dedicated to the implementation of suitable marine forecast systems for the estimate of the state of the ocean. Within the framework of the European MyOcean infrastructure, the pre-existing short-term Mediterranean Sea biogeochemistry operational forecast system has been upgraded by assimilating remotely sensed ocean color data in the coupled transport-biogeochemical...

HPC computation issues of the incremental 3 D variational data assimilation scheme in OceanVar software ∗ †

The most significant features of Data Assimilation (DA) are that both the models and the observations are very large and non-linear (of order at least O(10)). Further, DA is an ill-posed inverse problem. Such properties make the numerical solution of DA very difficult so that, as stated in [19], ”solving this problem in ”real-time” it is not always possible and many different approximations to ...