Ice wine
Encyclopedia
Dessert wine
Dessert wines are sweet wines typically served with dessert.There is no simple definition of a dessert wine. In the UK, a dessert wine is considered to be any sweet wine drunk with a meal, as opposed to the white fortified wines drunk before the meal, and the red fortified wines drunk after it...
produced from grape
Grape
A grape is a non-climacteric fruit, specifically a berry, that grows on the perennial and deciduous woody vines of the genus Vitis. Grapes can be eaten raw or they can be used for making jam, juice, jelly, vinegar, wine, grape seed extracts, raisins, molasses and grape seed oil. Grapes are also...
s that have been frozen
Freezing
Freezing or solidification is a phase change in which a liquid turns into a solid when its temperature is lowered below its freezing point. The reverse process is melting....
while still on the vine
Vine
A vine in the narrowest sense is the grapevine , but more generally it can refer to any plant with a growth habit of trailing or scandent, that is to say climbing, stems or runners...
. The sugar
Sugar
Sugar is a class of edible crystalline carbohydrates, mainly sucrose, lactose, and fructose, characterized by a sweet flavor.Sucrose in its refined form primarily comes from sugar cane and sugar beet...
s and other dissolved solids do not freeze, but the water does, allowing a more concentrated grape must
Must
Must is freshly pressed fruit juice that contains the skins, seeds, and stems of the fruit. The solid portion of the must is called pomace; it typically makes up 7%–23% of the total weight of the must. Making must is the first step in winemaking...
to be pressed from the frozen grapes, resulting in a smaller amount of more concentrated, very sweet wine. With ice wines, the freezing happens before the fermentation
Fermentation (wine)
The process of fermentation in wine turns grape juice into an alcoholic beverage. During fermentation, yeast interact with sugars in the juice to create ethanol, commonly known as ethyl alcohol, and carbon dioxide...
, not afterwards. Unlike the grapes from which other dessert wines are made, such as Sauternes
Sauternes (wine)
Sauternes is a French sweet wine from the Sauternais region of the Graves section in Bordeaux. Sauternes is made from Sémillon, Sauvignon Blanc, and Muscadelle grapes that have been affected by Botrytis cinerea, also known as noble rot. This causes the grapes to become partially raisined,...
, Tokaji
Tokaji
Tokaji is the name of the wines from the region of Tokaj-Hegyalja in Hungary and Slovakia. The name Tokaji is used for labeling wines from this wine district. This region is noted for its sweet wines made from grapes affected by noble rot, a style of wine which has a long history in this region...
, or Trockenbeerenauslese
Trockenbeerenauslese
Trockenbeerenauslese is a German language wine term for an intensely sweet dessert wine-style wine....
, ice wine grapes should not be affected by Botrytis cinerea
Botrytis cinerea
Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as botrytis bunch rot; in horticulture, it is usually called grey mould or gray mold.The fungus gives rise to two different kinds of...
or noble rot
Noble rot
Noble rot is the benevolent form of a grey fungus, Botrytis cinerea, affecting wine grapes. Infestation by Botrytis requires moist conditions, and if the weather stays wet, the malevolent form, "grey rot", can destroy crops of grapes...
, at least not to any great degree. Only healthy grapes keep in good shape until the opportunity arises for an ice wine harvest, which in extreme cases can occur after the New Year, on a northern hemisphere calendar. This gives ice wine its characteristic refreshing sweetness balanced by high acidity. When the grapes are free of Botrytis, they are said to come in "clean".
Due to the labour-intense and risky production process resulting in relatively small amounts of wine, ice wines are generally quite expensive.
Canada and Germany are the world's largest producers of ice wines. About 75 percent of the ice wine in Canada comes from Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....
.
Sparkling ice wine
There is also a sparkling version of ice wine. Sparkling ice wine was created accidentally in 1988, by Canadian wine writer, Konrad Ejbich, in his home cellar, using tank samples of the previous year's ice wine, from the InniskillinInniskillin
Inniskillin is a Canadian winery located in Niagara-on-the-Lake, Ontario. Inniskillin, which is mainly noted for their icewine production, has played an important pioneering role in the modern Canadian wine industry...
winery in Ontario. In 1996, finally acknowledging he could not produce this product himself on a commercial basis, Ejbich decided to share the concept. He wrote about his experience with sparkling ice wine in his column in Wine Tidings magazine, challenging Canadian wineries to make sparkling ice wine on a commercial basis. The Magnotta winery in Ontario filled a 50-litre metal beer barrel with ice wine, carbonated
Carbonation
Carbonation is the process of dissolving carbon dioxide in water. The process usually involves carbon dioxide under high pressure. When the pressure is reduced, the carbon dioxide is released from the solution as small bubbles, which cause the solution to "fizz." This effect is seen in carbonated...
it, and called their product the first commercial sparkling
Sparkling wine
Sparkling wine is a wine with significant levels of carbon dioxide in it making it fizzy. The carbon dioxide may result from natural fermentation, either in a bottle, as with the méthode champenoise, in a large tank designed to withstand the pressures involved , or as a result of carbon dioxide...
ice wine. However, Ontario's Vintners Quality Alliance
Vintners Quality Alliance
Vintners Quality Alliance, or VQA, is a regulatory and appellation system which guarantees the high quality and authenticity of origin for Canadian wines made under that system in British Columbia and Ontario. It is similar to regulatory systems in France , Italy , and Germany...
(VQA) would not give the product its stamp of approval because no such category existed in its regulations. In 1998, Inniskillin Wines produced the first charmat method sparkling ice wine. The VQA approved Inniskillin's product because it was not made using carbonation.
History
There are indications that frozen grapes were used to make wine in RomanAncient Rome
Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....
times. Pliny the Elder
Pliny the Elder
Gaius Plinius Secundus , better known as Pliny the Elder, was a Roman author, naturalist, and natural philosopher, as well as naval and army commander of the early Roman Empire, and personal friend of the emperor Vespasian...
(AD 23 - 79) wrote that certain grape varieties were not harvested before the first frost had occurred. The poet Martial
Martial
Marcus Valerius Martialis , was a Latin poet from Hispania best known for his twelve books of Epigrams, published in Rome between AD 86 and 103, during the reigns of the emperors Domitian, Nerva and Trajan...
recommended that grapes should be left on the vine until November or until they were stiff with frost. Details as to the winemaking and description of these wines are unknown. It cannot be completely ruled out that the descriptions refer to dried grape wines
Straw wine
Straw wine, or raisin wine, is a wine made from grapes that have been dried to concentrate their juice. The result is similar to that of the ice wine process, but suitable for warmer climates. The classic method dries clusters of grapes on mats of straw in the sun, but some regions dry them under...
, a common style of wine in Roman times, where the raisin
Raisin
Raisins are dried grapes. They are produced in many regions of the world. Raisins may be eaten raw or used in cooking, baking and brewing...
-like grapes were harvested late enough for the first frost to have fallen. In either case, the method seems later to have been forgotten.
Franconia (wine region)
Franconia is a region for quality wine in Germany situated in the north west of Bavaria in the district of Franconia, and is the only wine region in the federal state of Bavaria...
in Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
in 1794. Better documentation exists for an ice wine harvest in Dromersheim close to Bingen
Bingen am Rhein
Bingen am Rhein is a town in the Mainz-Bingen district in Rhineland-Palatinate, Germany.The settlement’s original name was Bingium, a Celtic word that may have meant “hole in the rock”, a description of the shoal behind the Mäuseturm, known as the Binger Loch. Bingen was the starting point for the...
in Rheinhessen
Rheinhessen (wine region)
Rheinhessen is the largest of 13 German wine regions for quality wines with under cultivation in 2008. Named for the traditional region of Rhenish Hesse, it lies on the left bank of the River Rhine between Worms and Bingen in the federal state of Rhineland-Palatinate...
on February 11, 1830. The grapes were of the 1829 vintage. That winter was harsh and some wine-growers had the idea to leave grapes hanging on the vine for use as animal fodder
Fodder
Fodder or animal feed is any agricultural foodstuff used specifically to feed domesticated livestock such as cattle, goats, sheep, horses, chickens and pigs. Most animal feed is from plants but some is of animal origin...
. When it was noticed that these grapes yielded very sweet must
Must
Must is freshly pressed fruit juice that contains the skins, seeds, and stems of the fruit. The solid portion of the must is called pomace; it typically makes up 7%–23% of the total weight of the must. Making must is the first step in winemaking...
, they were pressed and an Icewine was produced. It should be noted that sweet wines produced from late harvested grapes were well-established as the most valued German wine style by the early 19th century, following the discovery of Spätlese
Spätlese
Spätlese is a German wine term for a wine from fully ripe grapes, the lightest of the late harvest wines. Spätlese is a riper category than Kabinett in the Prädikatswein category of the German wine classification and is the lowest level of Prädikatswein in Austria, where Kabinett is classified in...
at Schloss Johannisberg
Schloss Johannisberg
Schloss Johannisberg is a winery in the Rheingau wine-growing region in Germany, that has been making wine for over 900 years. The winery is most noted for its claim to have "discovered" late harvest wine.- History :...
in Rheingau
Rheingau (wine region)
Rheingau is one of 13 German wine regions for quality wines . Named for the traditional region of Rheingau , the wine region is situated in the state of Hesse, where it makes up part of the Rheingau-Taunus-Kreis administrative district...
in 1775, and the subsequent introduction of the Auslese
Auslese
Auslese is a German language wine term for a late harvest wine and is a riper category than Spätlese in the Prädikatswein category of the Austrian and German wine classification. The grapes are picked from selected very ripe bunches in the autumn , and have to be hand picked...
designation. These wines would usually be produced from grapes affected by noble rot. Thus, Eiswein is a more recent German wine style than the botrytised wines.
Throughout the 19th century and until 1960, Eiswein harvests were a rare occurrence in Germany. Only six 19th century vintages with Eiswein harvests have been documented, including 1858, the first Eiswein at Schloss Johannisberg. There seem to have been little effort to systematically produce these wines during this period, and their production was probably the rare result of freak weather conditions. It was the invention of the pneumatic bladder press which made the production of ice wine practical and led to a substantial increase in the frequency and quantity of production. 1961 saw the production of a number of German Icewines, and the wine increased in popularity in the following years. The production has also been assisted by other technological inventions in the form of electrical lighting driven by portable generators (to assist harvest in the cold hours of morning darkness, before the grapes thaw) and plastic films that are used for "packaging" the vines in order to protect the ripe grapes from being eaten by birds while the producer waits for frost.
The pioneer status of the Inniskillin
Inniskillin
Inniskillin is a Canadian winery located in Niagara-on-the-Lake, Ontario. Inniskillin, which is mainly noted for their icewine production, has played an important pioneering role in the modern Canadian wine industry...
winery in Niagara-on-the-Lake, Ontario
Niagara-on-the-Lake, Ontario
Niagara-on-the-Lake is a Canadian town located in Southern Ontario where the Niagara River meets Lake Ontario in the Niagara Region of the southern part of the province of Ontario. It is located across the Niagara river from Youngstown, New York, USA...
led to their first ice wine, produced in 1984 under the direction of the winery's Austria
Austria
Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...
n-born co-owner Karl Kaiser, often being mentioned as Canada's first ice wine. However, ice wine was produced in the Okanagan Valley of British Columbia
British Columbia
British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...
by German immigrant Walter Hainle in 1972. This ice wine was the result of an early and unexpected frost, and yielded 40 litres of wine, which Hainle originally did not intend to sell, although he did so in 1978. In 1983, Karl Kaiser and Inniskillin's German neighbour Ewald Reif, as well as two wineries with Austrian winemakers located in another part of Ontario, Hillebrand and Pelee Island, all left grapes on their vines in order to try to produce ice wine. Inniskillin and Reif lost their entire crop to hungry birds, while Hillebrand and Pelee Island were able to harvest a minuscule amount of frozen grapes. In 1984, Kaiser used nets to protect his vines and was able to produce Inniskillin's first ice wine. This wine was made from Vidal
Vidal Blanc
Vidal Blanc is an inter-specific hybrid variety of white wine grape, a cross of Ugni Blanc and Rayon d'Or . It manages to produce high sugar levels in cold climates while maintaining good acid levels....
grapes and was, in fact, labelled "Eiswein."
After the Icewine production was set on commercial footing, Canadian Icewine quickly became popular with domestic consumers and reviewers, and many other Canadian producers and regions picked up the idea, since the harsh Canadian winters lend themselves well to the large-scale production. The international breakthrough of Canadian ice wine came in 1991, when Inniskillin's 1989 Vidal ice wine won the Grand Prix d’Honneur at Vinexpo. The Canadian trend towards increased cultivation of Vitis vinifera
Vitis vinifera
Vitis vinifera is a species of Vitis, native to the Mediterranean region, central Europe, and southwestern Asia, from Morocco and Portugal north to southern Germany and east to northern Iran....
(European) grape varieties in the 1990s expanded the palette of varieties available to be bitten by frost. By the early 2000s, Canada was established as the largest producer of ice wine in the world. More international recognition came in 2007, when Monde Selection, the international institute in Brussels, Belgium, awarded the Grand Gold medal—the highest honor rarely accorded to a wine—to Canada’s Northern Ice Vidal Blanc Icewine 2005, the first vintage of The Ice House in Niagara, a winery founded by winemaker Jamie Macfarlane.
In Germany in the early 2000s, good ice wine vintages have been more rare than throughout the 1980s and 1990s. Many wine-growers cite climate change
Climate change
Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. It may be a change in average weather conditions or the distribution of events around that average...
as a cause, and this received support from a study by the Geisenheim Institute
Geisenheim Grape Breeding Institute
The Geisenheim Grape Breeding Institute was founded in 1872 and is located in Geisenheim, Rheingau, Germany. In 1876 professor Hermann Müller from Switzerland joined the institution, where he developed his namesake variety Müller-Thurgau , which became the most planted grape variety in Germany in...
.
European Ice Wine
The most famous (and expensive) ice wines are GermanGerman wine
German wine is primarily produced in the west of Germany, along the river Rhine and its tributaries, with the oldest plantations going back to the Roman era. Approximately 60 percent of the German wine production is situated in the federal state of Rhineland-Palatinate, where 6 of the 13 regions ...
Eiswein and Canadian
Canadian wine
Canadian wine is produced in mainly southern British Columbia and southern Ontario. There is also a growing number of small scale producers of grapes and wine in southern Quebec and Nova Scotia. The two largest wine-producing regions in Canada are the Okanagan Valley of British Columbia and the...
Icewine (where the name is written as one word), but ice wine is also made in Australia
Australian wine
The Australian Wine Industry is the fourth largest exporter of wine around the world, with 760 million litres a year to a large international export market and contributes $5.5 billion per annum to the nation's economy...
, Austria
Austrian wine
Austrian wines are mostly dry white wines with some luscious dessert wines made around the Neusiedler See. About 30% of the wines are red, made from Blaufränkisch , Pinot Noir and locally bred varieties such as Zweigelt...
, Croatia
Croatia
Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...
, Czech Republic
Czech wine
Wine in the Czech Republic is produced mainly in southern Moravia, although a few vineyards are located in Bohemia. However, Moravia accounts for around 96% of the country's vineyards, which is why Czech wine is more often referred to as Moravian wine ...
, France
French wine
French wine is produced in several regions throughout France, in quantities between 50 and 60 million hectolitres per year, or 7–8 billion bottles. France has the world's second-largest total vineyard area, behind Spain, and is in the position of being the world's largest wine producer...
, China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
, Hungary, Israel
Israeli wine
Israeli wine is produced by hundreds of wineries, ranging in size from small boutique enterprises to large companies producing over ten million bottles per year. Wine has been produced in the Land of Israel since biblical times. In 2009, Israeli wine exports totaled over $22 million...
, Italy
Italian wine
Italian wine is wine produced in Italy, a country which is home to some of the oldest wine-producing regions in the world. Italy is the world's largest wine producer, responsible for approximately one-fifth of world wine production in 2005. Italian wine is exported largely around the world and has...
, Luxembourg
Luxembourg wine
Luxembourg wine is primarily produced in the southeastern part of the Grand Duchy of Luxembourg, with vineyards overlooking the Moselle River. Along this river, which for 42 km makes up part of the border between Luxembourg and Germany, wine is made in three countries. There is a continuous history...
, New Zealand
New Zealand wine
New Zealand wine is largely produced in ten major wine growing regions spanning latitudes 36° to 45° South and extending . They are, from north to south Northland, Auckland, Waikato/Bay of Plenty, Gisborne, Hawke's Bay, Wellington, Nelson, Marlborough, Canterbury/Waipara and Central...
, Slovakia
Slovak wine
Slovak wine is produced in the southern part of Slovakia, which is divided into 6 wine-producing areas.Although Slovak wines except Tokaj are not well known internationally, they are popular domestically and in neighbouring countries.-Regions:...
, Slovenia
Slovenian wine
Slovenian wine is wine from the Central European country of Slovenia. Viticulture and winemaking has existed in this region since the time of the Celts and Illyrians tribes, long before the Romans would introduce winemaking to the lands of France, Spain and Germany...
, Sweden
Swedish wine
Swedish wine, in terms of wine produced commercially from grapes grown in Sweden, is a very marginal but growing phenomenon which saw its first beginnings in the late 1990s....
and United States
American wine
American wine has been produced for over 300 years. Today, wine production is undertaken in all fifty states, with California producing 89 percent of all US wine...
, at least in smaller quantity. Eiswein is part of the Prädikatswein quality category in the German wine classification
German wine classification
German wine classification consists of several quality categories and is often the source of some confusion, especially among non-German speaking wine consumers. The official classification is set down in the wine law of 1971, although some changes and amendments have been made since then...
, and Icewine in Canada must follow VQA
Vintners Quality Alliance
Vintners Quality Alliance, or VQA, is a regulatory and appellation system which guarantees the high quality and authenticity of origin for Canadian wines made under that system in British Columbia and Ontario. It is similar to regulatory systems in France , Italy , and Germany...
protocol to be labelled as such. The French language term Vin de glace is part of the wine classification in Luxembourg, but not in France, but is sometimes found on the rare bottles of ice wine produced in Alsace
Alsace wine
Alsace wine or Alsatian wine is produced in the Alsace region in France and is primarily white. These wines, which for historical reasons have a strong Germanic influence, are produced under three different Appellations d'Origine Contrôlées : Alsace AOC for white, rosé and red wines, Alsace Grand...
.
Canadian Ice Wine
In contrast to most other wine-producing regions, Canada, particularly the Niagara PeninsulaNiagara Peninsula
The Niagara Peninsula is the portion of Southern Ontario, Canada lying between the south shore of Lake Ontario and the north shore of Lake Erie. It stretches from the Niagara River in the east to Hamilton, Ontario in the west. The population of the peninsula is roughly 1,000,000 people...
, consistently undergoes freezing in winter and has become the world's largest ice wine producer. Icewine production in Canada is regulated by the Vintners Quality Alliance
Vintners Quality Alliance
Vintners Quality Alliance, or VQA, is a regulatory and appellation system which guarantees the high quality and authenticity of origin for Canadian wines made under that system in British Columbia and Ontario. It is similar to regulatory systems in France , Italy , and Germany...
in the provinces of British Columbia and Ontario. If the sugar level in the grapes measures less than 35° Brix
Brix
Degrees Brix is the sugar content of an aqueous solution.One degree Brix is 1 gram of sucrose in 100 grams of solution and represents the strength of the solution as percentage by weight . If the solution contains dissolved solids other than pure sucrose, then the °Bx is only approximate the...
, then they may not be used for icewine, a minimum considerably higher than that of German Eiswein. These grapes are often downgraded to a lower designation, such as Special Select Late Harvest or Select Late Harvest. Canadian rules were further tightened in British Columbia in 2000 after a producer dealt with the mild winter of 1999 by moving grapes up to the mountains to seek freezing temperatures.
Though Pelee Island Winery and Hillebrand were Canada's first commercial icewine producers, starting production in 1983, Inniskillin Wines is considered the most widely known Canadian icewine producer as the first Canadian winery to win a major international award, the Grand Prix d’Honneur at 1991 Vinexpo in France, with their 1989 Vidal Icewine (which was technically an illegal import into the EU
European Union
The European Union is an economic and political union of 27 independent member states which are located primarily in Europe. The EU traces its origins from the European Coal and Steel Community and the European Economic Community , formed by six countries in 1958...
), placing Canadian icewines on the world stage. Pillitteri Estates Winery has emerged in the 2000s as the world’s largest estate icewine producer. In November 2006 the Canadian producer Royal DeMaria released five cases of Chardonnay
Chardonnay
Chardonnay is a green-skinned grape variety used to make white wine. It is originated from the Burgundy wine region of eastern France but is now grown wherever wine is produced, from England to New Zealand...
icewine with a half-bottle price set at C$
Canadian dollar
The Canadian dollar is the currency of Canada. As of 2007, the Canadian dollar is the 7th most traded currency in the world. It is abbreviated with the dollar sign $, or C$ to distinguish it from other dollar-denominated currencies...
30,000, making it the world's most expensively priced wine.
American Ice Wine
Select Wineries in Northern MichiganMichigan wine
Michigan wine refers to any wine that is made in the U.S. state of Michigan. As of 2007, there were under wine-grape cultivation and 64 commercial wineries in Michigan, producing 425,000 cases of wine . According to another count there were 112 operating wineries in Michigan in 2007.Wine and...
put aside a portion of their Riesling grapes each year for the production of ice wine. Ice wine was first produced in Michigan in 1983 by Mark Johnson, who studied at the Federal Research Station and Institute in Geisenheim
Geisenheim
Geisenheim is a town in the Rheingau-Taunus-Kreis in the Regierungsbezirk of Darmstadt in Hessen, Germany, and is known as Weinstadt , Schulstadt , Domstadt and Lindenstadt ....
, Germany. Johnson is currently the head Winemaker at Chateau Chantal
Chateau Chantal
Chateau Chantal is a winery located on the Old Mission Peninsula, only a few miles north of Traverse City, in Grand Traverse County, Michigan. The chateau sits atop one of the highest points on the Old Mission Peninsula and has stunning views of both East and West arms of Grand Traverse Bay. The...
. Northern Michigan Wineries continue to follow the German laws that govern what wine qualifies as ice wine
Ice wine
Ice wine is a type of dessert wine produced from grapes that have been frozen while still on the vine. The sugars and other dissolved solids do not freeze, but the water does, allowing a more concentrated grape must to be pressed from the frozen grapes, resulting in a smaller amount of more...
. German law dictates that ice wine must be picked only when the grapes are frozen on the vine, while United States law allows for wine to be sold as ice wine if the grapes are picked and then artificially frozen. In 2002, 6 Michigan wineries produced over 13,000 half-bottles of ice wine, a record at that time.
Breaux Vineyards in western Loudoun County, VA as of 2011 offers an Ice Wine made from the Nebbiolo grape.
Production
Natural ice wines require a hard freezeFreezing
Freezing or solidification is a phase change in which a liquid turns into a solid when its temperature is lowered below its freezing point. The reverse process is melting....
(by law in Canada −8 °C (17 °F) or colder, and in Germany −7 °C (19 °F) or colder), to occur sometime after the grapes are ripe
Ripening
Ripening is a process in fruits that causes them to become more palatable. In general, a fruit becomes sweeter, less green, and softer as it ripens. Even though the acidity of fruit increases as it ripens, the higher acidity level does not make the fruit seem tarter, which can lead to the...
, which means that the grapes may hang on the vine
Vine
A vine in the narrowest sense is the grapevine , but more generally it can refer to any plant with a growth habit of trailing or scandent, that is to say climbing, stems or runners...
for several months following the normal harvest. If a freeze does not come quickly enough, the grapes may rot and the crop will be lost. If the freeze is too severe, no juice can be extracted. Vineland Winery in Ontario once broke their pneumatic press in the 1990s while pressing the frozen grapes because they were too hard (the temperature was close to −20 °C). The longer the harvest is delayed, the more fruit will be lost to wild animals and dropped fruit. Since the fruit must be pressed while it is still frozen, pickers often must work at night or very early in the morning, harvesting the grapes within a few hours, while cellar workers must work in unheated spaces.
In Austria, Germany, and Canada, the grapes must freeze naturally to be called ice wine. In other countries, some winemakers use cryoextraction (that is, mechanical freezing) to simulate the effect of a frost and typically do not leave the grapes to hang for extended periods as is done with natural ice wines. These non-traditional ice wines are sometimes referred to as "icebox wines". An example is Bonny Doon's Vin de Glacière or King Estate's Vin Glace (made from Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
Pinot Gris
Pinot Gris
Pinot gris is a white wine grape variety of the species Vitis vinifera. Thought to be a mutant clone of the Pinot noir grape, it normally has a grayish-blue fruit, accounting for its name but the grape can have a brownish pink to black and even white appearance...
grapes).
The high sugar level in the must
Must
Must is freshly pressed fruit juice that contains the skins, seeds, and stems of the fruit. The solid portion of the must is called pomace; it typically makes up 7%–23% of the total weight of the must. Making must is the first step in winemaking...
leads to a slower-than-normal fermentation. It may take months to complete the fermentation (compared to days or weeks for regular wines) and special strains of yeasts should be used. Because of the lower yield of grape musts and the difficulty of processing, ice wines are significantly more expensive than table wine
Table wine
Table wine is a wine term with two different meanings: a wine style; and a quality level within wine classification.In the United States, table wine primarily designates a wine style - ordinary wine which is neither fortified nor sparkling....
s. They are often sold in half-bottle volume (375 ml) or the even smaller 200ml bottle. New World wineries in particular sometimes bottle 200 ml and 50 ml gift packages.
Requirements
The minimum must weightMust weight
Must weight is a measure of the amount of sugar in grape juice , and hence indicates the amount of alcohol that could be produced if it is all fermented to alcohol, rather than left as residual sugar...
requirements for ice wine is as follows, in the measures used in the respective country:
- For German Eiswein, 110 to 128 degrees Oechsle, the same as for BeerenausleseBeerenausleseBeerenauslese is a German language wine term for a dessert wine-style late harvest wine. Beerenauslese is a category in the Prädikatswein category of the Austrian and German wine classifications, and is a category above Auslese. Beerenauslese wines, often called "BA" for short, are usually made...
, depending on the region (wine growing zoneEuropean Union wine growing zonesThe European Union wine growing zones is a tool used in the common European Union wine regulations to regulate certain aspects of winemaking. The zones differ in terms of climate and examples of what is regulated by wine growing zone are required grape maturity at harvest and allowed levels of...
) and grape variety. - For Austrian Eiswein, 25 degrees KMW, the same as for BeerenausleseBeerenausleseBeerenauslese is a German language wine term for a dessert wine-style late harvest wine. Beerenauslese is a category in the Prädikatswein category of the Austrian and German wine classifications, and is a category above Auslese. Beerenauslese wines, often called "BA" for short, are usually made...
, corresponding to 125 °Oechsle. - For Canadian Icewine, 35 degrees Brix, corresponding to 153.5 °Oechsle.
- For Luxembourg Vin de glace, 120 °Oechsle.
Cryoextraction
Cryoextraction is the process by which grapes are frozen with refrigeration and pressed. WinemakerVintner
A vintner is a wine merchant. You pronounce it like this In some modern use, in particular in American English, the term is alsoused as a synonym for winemaker....
s subject grape
Grape
A grape is a non-climacteric fruit, specifically a berry, that grows on the perennial and deciduous woody vines of the genus Vitis. Grapes can be eaten raw or they can be used for making jam, juice, jelly, vinegar, wine, grape seed extracts, raisins, molasses and grape seed oil. Grapes are also...
s to temperatures around 20 degrees Fahrenheit (or -7 degrees Celsius), and press them while still frozen. Ice crystals remain in the press, while concentrated juice flows out. The resulting wine resembles ice wine. The process of freeze distillation is similar in its concentrating effects, although it occurs after fermentation.
Grape varieties
Riesling
Riesling is a white grape variety which originated in the Rhine region of Germany. Riesling is an aromatic grape variety displaying flowery, almost perfumed, aromas as well as high acidity. It is used to make dry, semi-sweet, sweet and sparkling white wines. Riesling wines are usually varietally...
, considered to be the most noble variety by German winemakers; Vidal
Vidal Blanc
Vidal Blanc is an inter-specific hybrid variety of white wine grape, a cross of Ugni Blanc and Rayon d'Or . It manages to produce high sugar levels in cold climates while maintaining good acid levels....
, highly popular in British Columbia and Ontario, Canada; and, interestingly, the red grape Cabernet Franc
Cabernet Franc
Cabernet Franc is one of the major black grape varieties worldwide. It is principally grown for blending with Cabernet Sauvignon and Merlot in the Bordeaux style, but can also be vinified alone - as in the Loire's Chinon...
. Many vintners, especially from the New World, are experimenting with making ice wine from other varieties: whites such as Seyval Blanc
Seyval Blanc
Seyval Blanc is a hybrid wine grape variety used to make white wines. Its vines ripen early, are productive and are suited to fairly cool climates.Seyval Blanc is grown mainly in England, and the Finger Lakes region of upstate New York, as well as to a lesser extent in Canada...
, Chardonnay
Chardonnay
Chardonnay is a green-skinned grape variety used to make white wine. It is originated from the Burgundy wine region of eastern France but is now grown wherever wine is produced, from England to New Zealand...
, Kerner
Kerner (grape)
The Kerner grape is an aromatic white grape variety. It was bred in 1929 by August Herold by crossing Trollinger and Riesling. Herold was working at a plant breeding station in Lauffen in the Württemberg region of Germany. This station belonged to a state breeding institute headquartered in...
, Gewürztraminer
Gewürztraminer
Gewürztraminer is an aromatic wine grape variety that performs best in cooler climates. It is sometimes referred to colloquially as Gewürz, and in French it is written '...
, Chenin Blanc
Chenin Blanc
Chenin blanc , is a white wine grape variety from the Loire valley of France. Its high acidity means it can be used to make everything from sparkling wines to well-balanced dessert wines, although it can produce very bland, neutral wines if the vine's natural vigor is not controlled...
, Pinot Blanc
Pinot Blanc
Pinot blanc is a white wine grape. It is a point genetic mutation of Pinot noir. Pinot noir is genetically unstable and will occasionally experience a point mutation in which a vine bears all black fruit except for one cane which produced white fruit....
, and Ehrenfelser
Ehrenfelser
Ehrenfelser is a white wine grape variety of German origin. It was created by Dr. Heinrich Birk at the Geisenheim Grape Breeding Institute in 1929, by crossing the varieties Riesling and Silvaner, with the identification of Silvaner being somewhat uncertain.Ehrenfelser is grown primarily in the...
; or reds such as Merlot
Merlot
Merlot is a darkly blue-coloured wine grape, that is used as both a blending grape and for varietal wines. The name Merlot is thought to derive from the Old French word for young blackbird, merlot, a diminutive of merle, the blackbird , probably from the color of the grape. Merlot-based wines...
, Pinot Noir
Pinot Noir
Pinot noir is a black wine grape variety of the species Vitis vinifera. The name may also refer to wines created predominantly from Pinot noir grapes...
, and even Cabernet Sauvignon
Cabernet Sauvignon
Cabernet Sauvignon is one of the world's most widely recognized red wine grape varieties. It is grown in nearly every major wine producing country among a diverse spectrum of climates from Canada's Okanagan Valley to Lebanon's Beqaa Valley...
. Pillitteri Estates Winery from the Niagara-on-the-Lake region of Ontario claim to be the first winery in the world producing Shiraz (Syrah) ice wine with the 2004 vintage, Semillion, and Sangiovese in 2007.
Ice wines from white varieties tend to be pale yellow or light gold in color when they are young and can maderise
Maderisation
Maderisation is a process that involves the heating and oxidization of a wine. The term is named after the process used in the production of Madeira wine, where it occurs while the wine is still in cask. The resulting wine darkens in color and acquires a Sherry-like character...
(acquiring a deep amber-golden color) as they age. The red varieties tend to have a light burgundy or even pink color like that of rosé wines, since the steeping of the skins in the pressed liquid typically used in red wine making is obviously not possible in ice wine production.
Characteristics
Even though it is normal for residual sugar content in ice wine to run from 180 g/L up to as high as 320 g/L (with a mean in the 220 g/L range), ice wine is very refreshing (as opposed to cloying) due to high acidity. (The titratable acidity in ice wine is almost always above 10 g/L.) Ice wine usually has a medium to full body, with a long lingering finish. The nose is usually reminiscent of peach, pear, dried apricot, honey, citrus, figs, caramel, green apple, etc., depending on the varietal. The aroma of tropical and exotic fruits such as pineapple, mango, or lycheeLychee
The lychee is the sole member of the genus Litchi in the soapberry family, Sapindaceae. It is a tropical and subtropical fruit tree native to Southern China and Southeast Asia, and now cultivated in many parts of the world...
is quite common, especially on white varietals .
Ice wine usually has a slightly lower alcohol content than regular table wine. Some Riesling ice wines from Germany have an alcohol content as low as 6%. Ice wines produced in Canada usually have higher alcohol content, between eight and 13 percent. In most years, ice wines from Canada generally have higher brix
Brix
Degrees Brix is the sugar content of an aqueous solution.One degree Brix is 1 gram of sucrose in 100 grams of solution and represents the strength of the solution as percentage by weight . If the solution contains dissolved solids other than pure sucrose, then the °Bx is only approximate the...
degree (must weight
Must weight
Must weight is a measure of the amount of sugar in grape juice , and hence indicates the amount of alcohol that could be produced if it is all fermented to alcohol, rather than left as residual sugar...
) compared to those from Germany. This is largely due to the more consistent winters in Canada. Must with insufficient brix level cannot be made into ice wine, and is thus often sold as "special select late harvest" or "select late harvest" at a fraction of the price that true ice wine commands.
Connoisseurs argue about whether ice wine improves with age or is meant to be drunk young. Those who support aging claim that ice wine's very high sugar level (which is often much higher than that of Sauternes
Sauternes (wine)
Sauternes is a French sweet wine from the Sauternais region of the Graves section in Bordeaux. Sauternes is made from Sémillon, Sauvignon Blanc, and Muscadelle grapes that have been affected by Botrytis cinerea, also known as noble rot. This causes the grapes to become partially raisined,...
) and high acidity preserve the content for many years after bottling. Those who disagree contend that as ice wine ages it loses its distinctive acidity, fruitiness, aroma, and freshness.
External links
- http://www.icewine.info Icewine at IceWine.info
- Ice wine at Wines of Canada
- Icewine informations Icewine website