We argue that the spatiotemporal dynamics of bred vectors in chaotic extended systems are related to a kinetic roughening process in the Kardar-Parisi-Zhang universality class. This implies that there exists a characteristic length scale corresponding to the typical extend over which the finite-size perturbation is actually correlated in space. This can be used as a quantitative parameter to characterize the degree of projection of the bred vectors into the dynamical attractor.
@article{arxiv.nlin/0311016,
title = {Dynamic Scaling of Bred Vectors in Chaotic Extended Systems},
author = {Cristina Primo and Miguel A. Rodriguez and Juan M. Lopez and Ivan Szendro},
journal= {arXiv preprint arXiv:nlin/0311016},
year = {2007}
}