Andalucia: Sherry production Flashcards
What other names has Jerez been know as historically?
- Xera: Phoenicians
- Ceret: Romans
- Sherish: Moors
What is Vinum Ceretensis?
This was a highly prized wine throughout the Roman empire.
Who created the Regulations of the Guild of Raisin & Grape Harvesters of Jerez in 1483 and why?
Sherry producers banded together to create these regulations to provide guidance on commercial practices such as:
* harvests
* aging
* barrel (“bota”) specifications
What has the English historically referred to sherry as?
Sack
The term is believed to have been taken from the Spanish word “sacar” meaning “to take out.”
What is the principal grape used for sherry production?
Palomino Fino (Listan Blanco)
* It occupies 95% of vineyards.
* indigenous to Andalucia
Where did Palomino Fino get its name?
This variety is believed to be named after Don Fernan Yanez Palomino, a knight who fought beside King Alfonso X during the Reconquista.
What are the characteristics of the Palomino Fino grape?
- moderately large clusters
- moderately large grapes
- low sugar
- low acidity
Why is Palomino Fino perfect for sherry production?
This grape produces a flat, low-alcohol wine that provides the perfect blank canvas upon which to infuse character and/or a patina of age through aging via the solera.
And, it is prone to oxidation.
Which 2 varieties are used as sweetening agents for sherry?
- Pedro Ximenez (PX)
- Moscatel (de Alejandria)
Which DOP has most of the PX planting in Jerez?
DO Mantilla-Moriles
- Warmer, less-humid growing conditions favor this grape’s full ripening
- Sherry producers can legally purchase finished sweet wine from this DO for blending purposes.
- varietal wines are produced in this DO using this variety
Which ancient variety in Jerez is grown for consumption (fruit or rainsins) as well as for vinification?
Moscatel (de Alejandria)
* used as a sweetening agent in sherry
* produces varietal wines as well
What are the 2 prinicipal needs addressed by the new bodega design for sherry production in Jerez?
- retention of humidity: humidity is vital to the development of flor
- reduction of heat
What features contribute to the functional design of the Sherry Cathedrals (new bodegas) in Jerez for sherry production?
- high ceilings: for stacking of soleras
- windows to release heat
- esparto blinds to temper the light and when moistened, cool incoming air
- thick walls of porous sandstone/rough brick: maintains high moisture levels
- outside walls painted white: to reflect sunlight
- albero covered floors: absorbent sand helps regulate humity
- northeast/southwest orientation w/ strategically placed windows: allows entry of westerly Poniente winds, while blocking the strong, dry Levante winds from the east
Historically, what was the traditional method of crushing grapes in Jerez?
Grapes were foot-trodden by men who marched to music from midnight to noon (resting during the heat of the day). They wore shoes with soles studded with nails (zapatos de pisar). After a time, the spikes became skewered w/ grapes, forming a flat & gentle press.
Name the 3 press fractions for the base wine used in sherry production.
- Primera yema: mostly free-run juice; light & pale; ~65% of the total volume; typically used for Fino sherries
- Segunda yema: extracted via pneumatic press; contains more color & tannin; ~23% of total volume; used for Oloroso sherries
- Mosto prensa: the press fraction, receives more pressure & extracts a coarser, more inelegant juice; used for distillation, not sherry production
What containers are used in the fermentation process for the base wine in sherry production?
- temperature-controlled stainless steel tanks: more common
- traditional 132-159ga/500-600L wooden butt: a few smaller producers opt for this
Describe the fermentation process for the base wine in the production of dry sherry.
- primera yema & segunda yema are fermented separately
- indigenous yeasts are used
- fermented to dryness; i.e. no residual sugar remains
- 11%-12% abv in final product
Where is the base wine for sherry often crafted?
At special winemaking facilities near the vineyards (not in the sherry cathedrals).
This reduces the transportation time between grape & wine press significantly mitigating the risk of oxidation & the growth of spoilage organisms during harvest.
What attributes are considered when the base wines in sherry production undergo their first classification?
- color
- clarity
- aroma
What are the 2 types of aging used in sherry production?
- biological aging: under a film of surface yeast called “flor”; tanks/barrels are marked w/ a slash (/)
- physiochemical oxidation: in direct contact w/ air; tanks/barrels are marked w/ a circle (o)
What style of sherry is produced from wines that undergo biological aging?
- Finos
- Manzanillas
What style of sherry is produced from wines that undergo physiochemical oxidation?
Olorosos
What characteristics must a wine have to be destined for biological aging?
- distinct paleness
- finesse
What characteristic must a wine have to be destined for physiochemical oxidation?
greater structure
What is mitad y mitad?
This is a 50/50 mixture of distilled grape spirit & mature sherry. This mixture is aged in the solera system in one of two aging methods.
Wines destined to be Fino or Manzanilla are fortified to what abv for barrel aging?
15-15.5%
If fortified to above 17%, the flor will die.
What abv are Olorosos wines fortified to for barrel aging?
min. 17%%
This is to ensure the flor does not develop during aging.
How did the classification of base wine for sherry benefit from mechanization?
Mechanization allowed producers to determine which variables affected the quality of the juice, when it used to be a mystery.
The palest, clearest, most aromatic & least bitter base wine for sherry production hails from what?
- free-run juice
- grapes grown in albariza soil
- old vines
- wines made w/ excellent hygiene & care (roughly treated grapes pick up astringent compounds)
What is sobretabla?
This is an intermediary stage in sherry production after fortification of the base wine and before entering into the solera aging system.
What is the purpose of the sobretabla stage?
Wines destined for biological aging w/ flor (Finos & Manzanilla) often need time to show their true character.
After a period of time (between 3 months to 1 year) tasters analyze the wines again & confirm or change the original classification.
What happens to sherry butts where the flor is less vigorous or has died?
These butts are fortified to 17% and continue to age oxidatively as an Oloroso.
What happens to sherry butts not worthy of sherry producting?
These are used to make sherry vinegar.
What is velo de flor?
“Flower veil” is the living blanket of surface yeast that develops in sherry production during biological aging.
The flor that develops during biological aging in sherry production belongs to which strain of yeast?
Saccaromyces beticus
There are many strains, but this is the most abundant.
What factors contribute to the development of flor during biological aging?
- aerobic environment
- undisturbed
- cool & stable temperatures (ideally 64-68°F/18-20°C)
- humidity (>65%)
- closed bodega doors
- floor is regularly hosed down with water
What effect does the flor yeast have on the wine during biological aging?
Enzymes in the yeast catalyze a series of reactions which metabolizes alcohol, acid, & glycerin while producing aldehydes (oxidized alcohols) & fusel oils (higher alcohols).
Simultaneously, the flor protects the wine from acetobacter (the bacteria that produces vinegar) & serves as a semi-permeable barrier to prevent overt oxidation.
How long before the flor’s food source is depleted during biological aging?
12-18 months
What happens to the sherry barrel once the flor’s food source is depleted during biological aging?
The wine must be refreshed via the solera system, in which it receives younger wine w/ a fresh supply of alcohol & acid, in order to keep the biological aging process moving forward.
What is the minimum aging requirement for biologically aged wines as prescribed by the Denominacion de Origen?
min. 2 years
However, the majority of these wines age considerably longer.