Jura wine

Jura wine is French wine produced in the Jura "département". Located between Burgundy and Switzerland, this cool climate wine region produces wines with some similarity to Burgundy and Swiss wine. Jura wines are distinctive and unusual wines, the most famous being "vin jaune", which is made by a similar process to Sherry, developing under a flor-like strain of yeast. This is made from the local Savagnin grape variety. Other grape varieties include Poulsard, Trousseau, and Chardonnay. Other wine styles found in Jura includes a "vin de paille" made from Chardonnay, Poulsard and Savagnin, a sparkling "Crémant du Jura" made from slightly unripe Chardonnay grapes, and a "vin de liqueur" known as "Macvin du Jura" made by adding marc to halt fermentation. The renowned French chemist and biologist Louis Pasteur was born and raised in the Jura region and owned a vineyard near Arbois.
Climate and geography.
The climate of Jura is continental with many similarities to Burgundy but can be more aggressively cold, especially in the winter time. Ripeness levels of the grapes is always a concern for winemakers of the area and harvest times are often delayed as long as possible (usually well into late October) to try to achieve the highest sugar levels possible. To help lessen the threat of autumn frost, grapevines are often trained to the Guyot system.
The majority of the region's vineyards are found at altitudes between 820 and 1,310 ft (250-400 m) between the plains of the Bresse region and the Jura Mountains. The towns of Lons-le-Saunier and Arbois are the principal cities in the wine region. The vineyard soils tend to be composed of mostly clay in the lower flat lands with more limestone based soils in the higher elevation. Deposits of marl are scattered throughout the region with some of the area's most regarded vineyards being found on those sites. Many vineyard slopes are quite steep which creates problems with soil erosion.
Grapes and wine.
The main grapes of the region are Chardonnay (known locally as "Melon d'Arbois"), Savagnin (known locally as "Naturé"), Poulsard, Pinot noir, and Trousseau. Chardonnay and Pinot noir clippings were brought to the region from Burgundy during the Middle Ages and were used to a limited degree given that there were some 40 other grape varieties prevalent in Jura for most of its winemaking history. Towards the end of the 20th century both grapes began to increase in popularity, particularly the Chardonnay vine which now accounts for nearly 45% of all Jura plantings and is valued for its good sugar levels and early ripening.
Pinot noir is used to make a varietal style of wine or as a blend to deepen the color of the pale Poulsard grape. By itself, Poulsard makes a rosé in the Arbois-Pupillin region that is characterized by an orange "corail" tint. The Poulsard grape is also one of the primary grapes for the "vin de paille". The Trousseau grape performs best in the gravelly vineyards near Arbois that can give the grape the additional heat it needs to ripen into a deep colored, intensely flavored wine. The white Savagnin grape has some similarities with the possibly related Traminer and Gewürztraminer. While the grape is permitted in all styles of white Jura wine throughout the region it is mainly found in "vin jaune" where it produces a nutty, full bodied wine that can age for an extended period of time. Savagnin is the only variety allowed for a wine to carry the "vin jaune" name.
Vin jaune.
Jura's most famous and distinguishable wine is the sherry-like "vin jaune". The wine is produced by picking the Savagnin as ripe as possible, in some cases becoming a sort of late harvest wine. After fermentation the wine is stored in Burgundian aging barrels for 6 years or more. The barrels are filled up to the top but evaporation reduces the volume of liquid in the barrel and creates an air pocket at the top of the barrel. During this time the wine oxidizes and grows a film of yeast that is similar to, but not the same strain as, the Jerez region "flor". The wine is then bottled in a signature "clavelin" wine bottle that holds 62 cL. Vin jaune is an intensely flavored wine that often requires decanting prior to drinking.
Winemaking.
Due to the cool climate, chaptalization is permitted in the Jura region and is sometimes a necessity to compensate for the low sugar levels in the under ripe vintages. Most white wines in the region are aged in oak for several months prior to release while red wines are often aged in stainless steel tanks and bottled early. Producers in the Jura include Gaspard Feuillet, Chateau Béthanie, Domaine Berthet-Bondet, Frédéric Lornet, and Henri Maire.