Viticulture Ch 3 Flashcards
(21 cards)
What is macroclite
anything as large as Bordeaux for example. tens to hundreds of kilometers
Who introduced the 3 separate climate level
Richard Smart in 1984
What is mesoclimate
As small as a vineyard or as large as a sub-region i.e. Pomerol
what is the diurnal temperature range
it is the difference between daytime and nighttime mean temperatures
What is evapotranspiration?
The amount by which plants and the soil they grow in lose water
how many decisions are made from site selection to bottle
3000
What is LTI
Latitude temperature index developed by David Jackson in 1994
Take the mean temperature of the warmest month multiply it by 60 minus the latitude
This system is best used for cooler more maritime regions
How are degree days figured
Take the average daily temperature (the sum of the daily max and min temperatures divided by two) duringthe seven month growing season deducted by 50F (10C) and add it all up.
What is the growing season
Northern Hemisphere= April to October
Southern Hemisphere= October to April
What are the ranges for Region 1 to Region 5
Region 1 = 2500
Region 5 = 4000
What method is used to determine the continentality of a site
MTWM - MTCM
mean temperature warm and cold months
What is the ideal number of days without frost for a site to make successful grapes
180+ days
What are somethings that are often cited as a result of global warming
Higher natural sugars and therefore alcohol
What is a negative effect of global warming
Addition of pests and disease
Also temp changes could turn Bordeaux into Barossa and Barossa into too hot for winemaking
What is the current northerly limit for grape growing
50th parallel
Name 3 considerations when choosing a location for a vineyard
Water availability
Dips in land (cold air pockets, frost)
Autumn frosts
Prevailing winds
What is the temperature change per 100m as you rise in altitude
0.5-.06C per 100m
What is the ideal aspect for a site in the northern hemisphere
southerly up to 40degrees (this is the most extreme reasonable for harvesting). This maximizes solar radiation - insolation
What is the thermal zone
slopes are warmed by airs as it travels down the slope replaced by warmer air from above
Why would a vineyard in a cool climate want to be near a body of water?
Water is able to store more heat effectively than land and additionally is able to release heat.
Gulf water warm the north west coast of Europe by and estimated 9C
On a mesoclimate name 5 vineyard regions which benefit from proximity to bodies of water
Bordeaux and the Gironde Mosel and the Rhine Burgenland and Neusiedler See Lake Balaton in Hungary Hunter Valley
