Aroma - The Language of Scent in Wine

Quick Definition

Aroma refers to the full range of olfactory and gustatory impressions conveyed by a wine. In professional terminology, a distinction is made between primary, secondary, and tertiary aromas, each with different origins and representing different stages in the development of a wine.

At a glance:

• Category: Tasting, sensory perception
• Origin: Greek "aroma" (spice, scent)
• Synonyms: Bouquet (for aged wines), fragrance, nose
• English equivalents: Aroma, flavor, bouquet

Detailed Explanation

Aromas are the heart of wine tasting and the most complex sensory element of any wine. They arise from hundreds of volatile chemical compounds formed during the various phases of winemaking and ageing.

The three aroma categories:

1. Primary Aromas (Grape Aromas) These aromas come directly from the grape and are characteristic of the variety. They are determined by the grape variety, the terroir, the climate, and the timing of harvest.

• Examples: Gooseberry (Sauvignon Blanc), peach (Viognier), blackcurrant (Cabernet Sauvignon), violet (Syrah)
• Chemical basis: Terpenes, pyrazines, thiols, and other variety-specific compounds

2. Secondary Aromas (Fermentation Aromas) These aromas develop during alcoholic fermentation and malolactic fermentation through the activity of yeasts and bacteria.

• Examples: Butter and cream (diacetyl from malolactic fermentation), banana and pear (esters from yeast fermentation), brioche and yeast (in bottle-fermented wines like Champagne)
• Chemical basis: Esters, aldehydes, higher alcohols, diacetyl

3. Tertiary Aromas (Ageing Aromas) These aromas develop during barrel and bottle ageing through oxidation and chemical transformations.

• Examples: Vanilla and toast (barrel ageing), leather and tobacco (red wine ageing), honey and nuts (oxidative ageing in white wine), truffle and forest floor (extended bottle ageing)
• Chemical basis: Phenolic compounds, Maillard reactions, oxidative processes

Scientific background: Humans can distinguish over 10,000 different scents, and wine can contain hundreds of distinct aroma compounds. Perception occurs both orthonasally (through the nose) and retronasally (from the palate through the back of the throat to the nose). Retronasal perception while tasting is often more intense than simply smelling the wine directly in the glass.

Practical Relevance

In the Glass

Aromas are the first thing we perceive in a wine, and they significantly shape our overall assessment. A complex, multi-layered aroma profile signals quality, while one-dimensional or absent aromas may point to flaws.

When Buying

Aroma descriptions on labels and in tasting notes help you select wines that match your personal preferences. Those who enjoy fruity wines look for primary aromas like "red berries" or "tropical fruits". Lovers of complex wines tend to favour tertiary aromas such as "leather" or "forest floor".

At a Tasting

The systematic identification of aromas is at the core of professional wine tasting. Tasters use aroma wheels and train for years to recognise and classify hundreds of different aromas.

Examples & Application

Concrete Examples by Grape Variety

Primary-aroma-dominated wines:

• Sauvignon Blanc: Gooseberry, green pepper, grass, elderflower
• Gewürztraminer: Lychee, rose blossom, spice
• Cabernet Sauvignon: Blackcurrant (cassis), cedarwood, green pepper
• Riesling: Peach, apple, citrus, petrol (with age)

Secondary-aroma-dominated wines:

• Champagne (traditional method): Brioche, yeast, butter, toast
• Chardonnay (with malolactic fermentation): Butter, cream, croissant
• Beaujolais Nouveau: Banana, bubblegum, pear (from carbonic maceration)

Tertiary-aroma-dominated wines:

• Aged Bordeaux: Cedarwood, cigar, leather, truffle
• Aged Rioja: Vanilla, coconut, leather, tobacco
• Aged Riesling: Petrol, honey, candied fruit
• Vintage Port: Chocolate, coffee, dried figs

Practical Tips for Identifying Aromas

1. Training: Use aroma kits (Le Nez du Vin) or practise with real-world scents from the kitchen (vanilla pod, lemon zest, coffee beans).

2. Systematic approach: Work through the aromatic spectrum methodically — from fruity to floral, spicy, earthy, through to animal and gamey.

3. Focus: Smell in short bursts rather than continuously, as olfactory receptors fatigue quickly.

4. Comparisons: Smell several wines of the same variety to identify characteristic varietal aromas.

5. Context: Consider the origin, age, and ageing method of the wine to better place the aromas.

Historical Context

The systematic analysis of wine aromas is a relatively recent development. While wine has been consumed for millennia, the scientific investigation of aroma compounds only began in the 20th century.

In the 1970s, Ann Noble of UC Davis developed the famous "Wine Aroma Wheel", which offered the first systematic classification of wine aromas. This tool revolutionised wine tasting and communication around the world.

From the 1980s onwards, modern gas chromatography made it possible to identify the specific chemical compounds responsible for particular aromas. For example, researchers discovered that the characteristic gooseberry aroma of Sauvignon Blanc comes from methoxypyrazines, while the petrol note in aged Rieslings is attributable to TDN (trimethyldihydronaphthalene).

Today we know that wine can contain over 800 different aroma compounds, many of which are perceptible at extremely low concentrations (parts per billion). This complexity makes wine one of the most aromatically diverse foods in existence.

Country- and Region-Specific Notes

France: A precise distinction is made between "arôme" (young wines, primary and secondary) and "bouquet" (aged wines, tertiary). French wine schools place great emphasis on identifying terroir-typicity in the aromas.

Italy: "Profumo" describes the aromas, differentiated into "primario", "secondario", and "terziario". Italian tasters often emphasise the balance between fruit and spicy notes.

Germany: The term "Bukett" is used for the overall aroma profile, particularly in aged wines. German Rieslings are renowned for their multifaceted aroma profile, ranging from citrus and stone fruit to mineral notes.

Spain: "Aroma" is used universally, often with qualifiers such as "afrutado" (fruity) or "especiado" (spicy). The barrique ageing of traditional Spanish wines strongly defines the tertiary aromas.

English-speaking world: "Aroma" generally refers to olfactory impressions, while "flavor" denotes the combination of smell and taste. "Bouquet" is reserved for aged wines.

New World (Australia, New Zealand, USA): Often very fruit-forward aroma descriptions, with precise references to familiar fruits. New Zealand is particularly well known for the intense primary aromas of its Sauvignon Blancs.

Related Terms & Links

• Bouquet: Refers specifically to the aromas of aged wines (tertiary aromas) and is more complex than the primary aroma of a young wine.

• Finish: The aromas perceived on the finish are often different from those initially detected.

• Degustation: Systematic aroma analysis is the central component of every wine tasting.

• Grape variety: Each variety has characteristic primary aromas that can be used for identification.

• Terroir: Soil type, climate, and microclimate all significantly influence the expression of primary aromas.

• Oxidation: Controlled oxidation develops certain tertiary aromas such as nuts and caramel.

Common Questions & Misconceptions

Question: Are aromas artificially added to wine?

Answer: No, generally not. All aromas in quality wine arise naturally from the grape, the fermentation, or the ageing process. Adding aromas to wine is prohibited by law. If a wine tastes of vanilla, this comes from the vanillin compounds in the oak barrel, not from added vanilla extract.

Question: Why do I smell different aromas from my neighbour?

Answer: Aroma perception is partly genetically determined and strongly shaped by personal experience. Some people are "supertasters" with more taste buds; others have genetic variants that cause them to perceive certain aromas more intensely — or not at all. We also associate smells with personal memories, which makes descriptions highly individual.

Question: Do wines become more aromatic over time, or do they lose aroma?

Answer: Both can happen. Young wines often have intense primary aromas (fruit) that diminish over time. At the same time, more complex tertiary aromas develop (leather, tobacco, mushroom) that many find more interesting. Not all wines benefit from ageing — simple wines generally only lose aroma without developing new ones.

Question: Can you train yourself to identify aromas?

Answer: Absolutely. Aroma recognition is a trainable skill. Professional sommeliers train for years. Aroma kits, regular conscious smelling in everyday life, and comparative tastings of the same variety from different regions are all highly recommended.

Question: What does it mean when a wine is described as "aromatic"?

Answer: The term "aromatic grape variety" refers to varieties with particularly intense, perfumed primary aromas, such as Gewürztraminer, Muscat, or Torrontés. More generally, "aromatic" means that a wine has pronounced, clearly perceptible aromas.

Expert Tips

When identifying aromas, trust your first instinct. The initial association that comes to mind is often the most accurate. Tasters who deliberate too long tend to over-complicate things and start "finding" aromas that are not actually there.

A practical tip for home use: build your own "aroma bank". Collect small jars with characteristic scents — coffee beans, lemon zest, a vanilla pod, peppercorns, dried mushrooms, a small piece of leather. Smell them regularly, then return to the wine. You will be surprised how quickly your aroma vocabulary expands.

For food pairing: match aromas. A wine with mushroom and forest floor notes pairs perfectly with mushroom dishes. A wine with citrus aromas complements fish dishes with lemon. This aroma bridge is often more important than the classic rules about red and white wine.