D4 Sparkling Flashcards
(199 cards)
What can you tell about de growing environment for grapes ment for high quality sparkling wine.
Cool climates are key. The grapes are then just ripe in flavour, but retain the high acidity. Sugar accumulates slowly giving a potential alcohol for the base wine of 9-11% abv. So, greater latitudes or sites that have cooling influences (coast, altitude).
What kind of sparkling wines come from warmer areas?
The grapes have riper fruit flavours and lower acidity compared to grapes grown in cooler sites. This can be desirable for short-aged wines as the fruit wille provide the only or dominant flavours. Less expensive sparkling wines can be grown in areas where land is cheaper.
What are the characteristics of Chardonnay in a sparkling wine?
This variety is well suited for the production of autolytic styles. Subtle apple and citrus aromas complement the biscuit or pastry aromas. It is early ripening and retains high levels of acidity and low level of alcohol whilst avoiding under-ripe flavours.
It is also early budding en thus vulnerable to spring frost. Also prone to coulure and millerandage, susceptible to powdery mildew, grapevine yellows and botrytis bunch rot.
What are the characteristics of Pinot Noir in a sparkling wine?
This variety is early budding and early ripening en therefore suited for a cool climate. It is prone to spring frosts and coulure. Quality drops when yield is too high. It is disease prone (downy and powdery mildew, botrytis bunch rot, fan leaf and leaf roll).
It lends body to the blend.
In general what are factors within the grape variety that can influence the style of wine?
- Intensity of aromas (aromatic or neutral)
- Ability to retain acidity while ripening
- How the base wine responds to autolysis while applicable (chardonnay becomes creamy, Xarel-lo becomes toasty and smoky)
What can you tell about vineyard management in general for sparkling wine?
Grapes are often grown at higher yields because then high acid levels, low potential alcohol and delicate flavours can be achieved. In cool relatively rainy climates this can provide assurance that almost always a reasonable crop can be harvested. Trellising and training is dependent on the region, climate, varieties and the nutritional status of the soil. Priority is clean healthy fruit. Off flavours can be enhanced by the effervescence and laccase (enzyme released by botrytis infected grapes) can cause oxidation.
What can you tell about harvesting in general for sparkling wine?
Harvesting occurs earlier to achieve the high acid, low alcohol profile desired for sparkling wine. Early picking reduces the risk of fungal disease. Both hand harvesting and machine harvesting are used, depending on location and local wine laws.
What are the advantages and disadvantages of hand versus machine harvesting?
Hand harvesting permits sorting at picking and post-harvest selection to exclude disease-infected grapes, collecting in small crates minimise splitting as well as the subsequent oxidation and extraction of phenolics. But it is slow, labour-intensive and expensive.
Machine harvesting can rupture the skin, resulting in oxidation and extraction of phenolics. However it is faster and cheaper, it permits night-time harvesting. Diseased grapes can be removed by hand prior to machine harvesting, but this adds to the costs.
As for winemaking of sparkling wine in general, what can you tell me about pressing?
For traditional method and premium wines, whole bunch pressing is used. It is the gentlest form of pressing providing a delicate juice that is low in solids and phenolics. It is however time consuming. Pressing should be performed as quickly and gently as possible, especially for the black skinned grapes (minimising maceration and extraction). Phenolic compounds can make the wine taste bitter and feel coarse. Both pneumatic and basket presses are used, juice is split into different press fractions. They make useful blending options. Juice is clarified before fermentation. Excessive tannin or colour can be removed through fining (casein, gelatine or pvpp).
In general, how is primary fermentation carried out for sparkling wine?
Typical temperatures are 14-20 C to retain fruit flavours, but that its not too cold for the yeast. The low pH is very difficult for the yeast. Primary fermentation is often in stainless steel. Cultured neutral yeast are often used, often for both primary and secondary fermentation. Therefore careful consideration in choosing the yeast strain is advised (low pH, high alcohol, low temperature, high pressure, low nutrients). Rapid autolysis and easy flocculation is desired in traditional method. EC118 Prise de mousse is often used. MLF can be used in excessively acidic wines, can be used to enhance texture. If MLF is not desired the wine is often sterile filtered so it doesn’t take place during second fermentation (hazyness in the bottle)
What happens with the base wine in general?
Some wines are matured in oak or on the lees.
Almost all wines are blends, blends of wines from different vineyard sites, grape varieties, vintages and wines that have undergone different winemaking techniques is one of the hallmarks of sparkling wine production. For traditional method wines, final blend should be stabilised for tartrates and proteins before being bottled for second fermentation. For all methods, base wines should be clarified before second fermentation
What is in general the use of blending of the base wine?
- balance
- consistency
- style
- rosé wines
- complexity
- minimisation of faults
- volume
- price
What methods are there to make sparkling wine?
- traditional method
- transfer method
- ancestral method
- tank method
- asti method
- carbonation
What can you tell about the traditional method for sparkling wine?
First second fermentation: it occurs in the bottle. Liqueur de tirage is added (wine/must, sugar, yeast, nutrients and clarifying agent (bentonite/alginate)). Most fully sparkling wines 24g sucrose per litre is added. During fermentation this amount converts to +- 1,5% alcohol. The CO2 produced is kept in the bottle and gives about 6 bar. The bottle is closed with a crown cap and the wine is stored horizontally ‘sur latte’ at a constant temperature of 10-12 c. Often fermentation lasts 4-6 weeks.
Second is lees ageing: For autolysis. Length of time varies. Benefits are derived from autolysis, enzymatic breakdown of dead yeast cells. It can last for 10 years, it adds biscuit complexity. It also protects wine from oxidation. However longer on the lees, the faster evolution after disgorgement.
Third, riddling and disgorgement: Pupitres (by hand-8 weeks) or gyropalettes (remuage-3-4 days). Wines are stored upside down (sur pointe). The disgorgement: bottles are cooled to 7C, necks are immersed in frozen brine, bottle upright and removing crown cap also removing frozen yeast. Liqueur déxpedition is added (wine+sugar) to top of the bottle.
What is the role of dosage after disgorgement in general?
It is to balance acidity (important in young wines). The sugar in the liqueur d’expedition reacts with compounds formed during yeast autolysis in a process called the Maillard reaction. This encourages the development of roasted, toasted vanilla aromas.
What can you tell about the transfer method for sparkling wine?
This method was developed in 1940 to avoid the cost of manual riddling while retaining bready, biscuit notes attained through yeast autolysis in bottle. It reduces bottle to bottle variation and it is easier to make final adjustments to the wine. This method is used in champagne for bottles <37,5 cl and larger than 300 cl. Fining agents to aid flocculation do not need to be added with liqueur de tirage, after lees ageing in bottled the wine is chilled to 0C. Bottles are opened and wine is poured into pressurized receiving tanks. SO2 is added and sterile filtering is carried out before bottling.
What can you tell about the ancestral method for sparkling wine?
Partly fermented must is put into bottles and the remaining sugar is converted into alcohol and CO2. Sugar levels in the partly fermented must can be measured accurately and therefore the final level of pressure can be estimated. Winemakers can choose to disgorge or keep the light sediment. No dosage is added. Outcome can vary! Fermentation often slows down and stops because of lack of yeast nutrients, resulting in an off-dry wine. Pet-Nat (petillant naturel): low in alcohol, slightly cloudy, dry to off-dry with unconventional flavours sometimes compared to cider.
What can you tell about the tank method for sparkling wine?
Cuve Close, Charmat, Martinotti
Large volumes of sparkling wine to be made inexpensively, quickly and with significantly reduced labour costs in comparison to the traditional method. No riddling, disgorgement, dosage of period on lees. It is generally the preferred method when the winemaker wants to preserve the primary aromas and flavours of the grapes and does not desire autolytic characteristics. Producing fruity wines made with semi-aromatic (glera) or aromatic (muscat) varieties. First fermentation at 16-18 C. Sugar and yeast are added and rapid second fermentation takes place in pressurised tanks. It is arrested by cooling to 2-4 C when desired residual sugar and pressure are reached. Wine is cold stabilised to precipitate tartrates, yeast is removed by centrifugation or filtration, sugar and SO2 levels are checked and corrected and then sterile filtered-bottled. Wine is chilled to -2 and bottled by counter pressure filler.
What can you tell about the asti method for sparkling wine?
It is a variation of the tank method that produces sparkling wine in a single fermentation. Sugar that is converted in CO@ comes from te sugar in the original must, not through later tirage. Fermentation in reinforced tanks, in the first stage CO2 is enabled to escape, part way the valve is closed an the carbon dioxide is retained. Timing of this will depend on the level of pressure and amount of sugar desired in the final wine. After that wine is cooled so fermentation stops and it is filtered under pressure to remove yeast.
What can you tell me about the carbonation method for sparkling wine?
Least expensive and least prestigious, injection with carbon dioxide under pressure. More often used for petillant, lower pressure wines. It has the advantage of leaving the aroma and flavour characteristics of the base wine intact and thus it is suitable for aromatic or fruity sparkling wines.
What are the EU labelling terms for sweetness in sparkling wine?
0-3 g/L Brut Nature/Bruto Naturo/Naturherb/Zero dosage
0-6 g/L Extra Brut/Extra Bruto/Extra Herb
0-12 g/L Brut/Bruto/Herb
12-17 g/L Extra-sec/Extra-Dry/Extra Trocken
17-32 g/L Sec/Secco/Seco/Dry/Trocken
32-50 g/L Demi-sec/Semi-seco/Medium-Dry/Abboccato/Halbtrocken
50+ g/L Doux/Dulce/Sweet/Mild
With the notation that with brut nature, dosage cannot be added and that a bandwidth of +- 3 g/L tolerance is permitted
What can you tell me in general about closures for sparkling wine?
Prior to bottling the cork looks like any other cork, but significantly fatter (31 mm). Most corks are composed of agglomerate cork onto which two disks of natural cork have been glued. Increasingly, technical corks such as DIAM are used. Some use crown caps (often pet nat and ancestral methode made wine)
What are the factors that affect the characteristics of bubbles?
- Amount of sugar, more sugar = more CO2
- Capacity of CO2 to be dissolved in wine (which depends on variety, health and winemaking)
- Length of time on lees (some is lost, but the remainder forms a longer lasting foam)
- Disgorgement process
- Time in bottle and shape of closure
- The size and shape of glasses, which way they are cleaned, temperature of the wine
How is the main promotional and protective body in the Champagne called?
The Comité Interprofessionnel du Vin de Champagne (CIVC)