Hi all,
I ran the optimal perturbation case for both double_gyre and WC13 case, which give small values at the end (~10^-5). But when I ran the optimal perturbation for my own model, I got extreme large values (~10^5) at the end. I'm not sure why it happens. The time scale for the optimal perturbation is 4-days, similar as the WC13 case. Any suggestions to reduce the extreme large values are highly appreciated. Thanks a lot.