Data Assimilation Meetings at Reading

Date Meeting type Speakers
25 February 2015
Agric 1L16
Internal speakers Nikos Katzourakis, Jochen Broecker (University of Reading)
How can Calculus of Variations in the supremum norm optimise the results of Data Assimilation?
Calculus of Variations for functionals which are the supremum of some hamiltonian (rather than the classical case of the integral) has been pioneered by Aronsson in the early 1960s and is still a very active field of research. Until recently, the field was limited to the study of scalar valued problems. In the early 2010s, the 1st speaker initiated the development of the vectorial case, which is essential for the applications since most interesting problems are vector-valued. The huge benefit when we minimise the maximum instead of the average (integral) is that we obtain more realistic models since large “spikes” with small area are from the outset excluded. In this talk we will try to describe in non-technical terms the basic objects and ideas of this area and draw some connections to an ongoing project regarding applications of these ideas to variational data assimilation in continuous time.

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