This paper is presented in the context of sensitivity analysis (SA) of large-scale data assimilation (DA) models. We studied consistency. convergence. stability and roundoff error propagation of the reduced-space optimization technique arising in parallel 4D Variational DA problems. https://www.bekindtopets.com/discount-Ancient-Roman-Gladiator-Murmillo-Cassis-Crista-Helmet-With-Medieval-Style-Skullcap-Nasal-Helmets-With-Nose-Guard-3-Re-big-savings/