Most of the 2008 red wines produced by Navarro displayed very few smoky notes immediately after being fermented and aged; subsequently the wines received our normal "hands-off" winemaking regime. Not this Syrah. After fermentation in the early winter, we noticed that the Syrah was definitely smoky. We decided to filter all lots using reverse osmosis before we barrel aged the wine in order to ameliorate the filtration's side effects. The filtration had the intended effect of substantially reducing the smoky flavors, but unfortunately also diminished intensity.
Reverse osmosis is a type of filtration designed to remove specific large molecules. Its primary commercial use is water purification, removing salt from seawater. In 2008 we used RO to remove smokiness in the Syrah.