Transcript WSET Diploma White Grape Varieties Part 1

WSET Diploma
White Grape Varieties
Part 2
Mary Gorman, DWS
October 2010
White Grape Varieties - Part 2
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Riesling
Chenin Blanc
Viognier
Gewürztraminer
Muscat
Trebbiano
Winemaking Choices
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Harvest date (level of ripeness)
Selection & handling
Crush & de-stem + press or whole cluster pressing
Free run juice or/and press wine
PFM / cold soak
Settling / clarification
Fermentation vessel - barrel, INOX, mix + if barrel size and age of barrel
Yeasts - cultured , natural or mix
Fermentation temperatures
Reductive or oxidative winemaking
Must adjustments (acid, SO2, enzymes, DAP)
Malolactic fermentation - induced, suppressed
Lees ageing
Batonnage
Ageing: Oak, INOX - type, age and seasoning of oak, length of maturation time
Finishing - Clarification, stabilization and filtration
Dryness, Residual sugar, spritz
Riesling
• Aromatic variety
• Purity of varietal
expression
• Preserves identify
wherever grown
• Style versatility
• Lynchpin of German wine
industry
• Lots of name prostitution
• Spawned lots of crossings
Chenin Blanc
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Undervalued Jewel
Semi-aromatic variety
Style versatility
Synonyms
– Pinot de la Loire
– Pinot d’Anjou
– Steen
• Geographic spread
– Loire Valley
– South Africa
– Australia
Chenin Blanc
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Origin
In the Vineyard
At the Winery
Styles
Key regions
Quality and Ageability
Viognier
• Origin: 2004 - DNA shows
likely offspring of Freisa so related to Nebbiolo
• Aromatic variety
• Viognier love affair alternative to Chardonnay
• Difficult to grow
• Geographic spread
– France
– Australia
– California
Viognier
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Origin
In the Vineyard
At the Winery
Styles
Key regions
Quality and Ageability
Gewürztraminer
• Origin = Termeno
• Easy to recognize, difficult
to spell
• Strongly aromatic
• High alcohol and low acid
• Synonyms
– Traminer Aromatico
– Roter Traminer
– Savagnin Rosé
• Geographic spread
– France, Italy, Germany
– New Zealand, California
Gewürztraminer
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Origin
In the Vineyard
At the Winery
Styles
Key regions
Quality and Ageability
Muscat
• Oldest vine known to
man
• Over 200 variations but three key types
– Muscat à Petits Grains
– Muscat of Alexandria
– Muscat Ottonel
• Aromatic variety
• Color ranges from white
to near black
• Diversity of style
• Geographic spread
– Globally in warmer
climates
Muscat
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Origin
In the Vineyard
At the Winery
Styles
Key regions
Quality and Ageability
Trebbiano
• Neutral variety
• #1 white variety in Italy
• Many sub-varieties
– Trebbiano Toscano
– Trebbiano Romagnolo
– Trebbiano di Soave / Lugano
• Trebbiano Toscano
synonyms
– Ugni Blanc
– Saint Emilion
– White Hermitage
• Mediocre wines
• High acidity and high yielding
= major strengths
Trebbiano
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Origin
In the Vineyard
At the Winery
Styles
Key regions
Quality and Ageability