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Glossary entry

Spanish term or phrase:

refracción nocturna

English translation:

nocturnal radiation

Added to glossary by Damian Hosford
Oct 25, 2010 17:43
13 yrs ago
Spanish term

refracción nocturna

Spanish to English Other Wine / Oenology / Viticulture
In the following phrase:

"Esta obsesión por controlar cada palmo de tierra se ha trasladado a la elaboración de vinos. Exclusivamente con uvas procedentes de la Parcela X se ha elaborado el primer monovarietal de Y, un 100% Tempranillo. La Parcela, rica en caliza, es idónea para el cultivo de esta varietal, y la estructura del suelo permite mayor **refracción nocturna** dando lugar a una perfecta maduración del fruto.

what exactly is this, and how is it phrased in English?

thanks in advance.
Proposed translations (English)
4 nocturnal radiation
3 night refraction
2 heat reflection
Change log

Oct 28, 2010 08:31: Damian Hosford Created KOG entry

Discussion

Damian Hosford Oct 26, 2010:
I agree that "refraction" of the sun's rays can occur during the daytime and can aid the ripening of the grapes. The issue here is that refraction cannot have a great effect during the night, the moon is the only light "source", but as it is a reflection then it is very low grade and has a minimal effect. They are clearly stating that it is a process that is occurring during the night and that the soil surface and structure allows for the nocturnal radiation to assist with the ripening, it wouldn't surprise me that the vines are close to the ground to take full advantage of this process, hope it helps!
Christine Walsh Oct 26, 2010:
Good find. As David says,it may not be the scientific term, but if it's used in the industry... One often thinks of 'refraction' in terms of light, and for this reason the combintion with 'night' seems strange.
Lucy Phillips (asker) Oct 26, 2010:
I finally found a relevant link - look as though nocturnal/night refraction may work here, odd as it sounds to my ear!

"Presidio Vineyard & Winery was founded in 1991 from winemaker Douglas Braun’s concept of bringing European viticultural philosophy to Santa Barbara County . His idea was of a high-density, low-yield per vine vineyard, planted low to the ground to maximize the refraction of heat from the soil, at the winery’s estate Presidio Vineyard located west of the Santa Rita Hills near Lompoc . This certified organic and biodynamically farmed vineyard’s cool climate and southern-facing exposure is particularly well-suited for Pinot Noir, Syrah, and Chardonnay."

http://www.presidiowinery.com/vineyard.html

Proposed translations

16 hrs
Selected

nocturnal radiation

Hi Lucy,

The correct term is "radiational cooling" or "radiative cooling" rather than refraction, which is a change in direction of a wave of some form of energy.

I think they are stating that the soil is of the right consistency to allow for appropriate nocturnal radiation of heat absorbed during the day.

Hope it helps!
Reference:

http://forecast.weather.gov/glossary.php?word=radiational%20cooling

http://en.wikipedia.org/wiki/Radiative_cooling

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4 KudoZ points awarded for this answer. Comment: "thanks Damian"
50 mins

night refraction

The term is applied to war here!!! However, I imagine that the structure of the ground affects the levels of refraction, and thus the temperature, which makes the grapes ripen faster.

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Note added at 52 mins (2010-10-25 18:36:06 GMT)
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Sorry, forgot the link:

http://www.google.com.ar/url?sa=t&source=web&cd=4&ved=0CCkQF...
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5 hrs

heat reflection

just an idea -
nocturnal heat reflection or h.r. at night

Harnpshire affords variety from chalklands around Winchester to well drained gravelly loam at Wellow, Sandy soils feature in the New Forest and support a number of small vineyards while on its western edge there is stony ground, southern Europe's vineyards often appear to grow straight out of earthless stones with the merit of heat reflection. On the Isle of Wight Adgestone is on calcareous drift forming a fine south facing slope between 150- 250'.

http://flbenterprises.com/england.html

St. Helena AVA

Climate: Warm, due to greater protection from western hills, with less fog or wind incursions. The narrowing of the valley floor provides more heat reflection off the hillsides

http://www.napavintners.com/about/ab_3_appell.aspx

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Note added at 15 hrs (2010-10-26 09:38:10 GMT)
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I'm not sure which physical process is actually involved, heat reflection or heat refraction, but heat reflection is used quite a bit

We used vertical shoot positioning (VSP) when we built the trellising in the vineyard, again because it maximizes the sunlight into the vines and the sunlight directly into the fruit. VSP trellises are designed to keep the fruiting zones close to the ground (approximately 28 inches high) to get heat reflection from the ground.
http://www.shadowmountainvineyards.net/vineyard.html

The slate of the Mosel’s banks plays a crucial role in nurturing the vines, its porous nature and heat reflection helping ripen the grapes in these precarious conditions.
http://www.exploringwine.co.uk/MoselSaarRuwer.html

Watering young vines-the Sainte Victoire in the background
I arrived at the Foreign Legion estate in Puyloubier under a scorching sun. Backed to the massive 1legion_wine_vineyard_tractor Sainte-Victoire which culminates at an altitude of 1011 meters, the property gets lots of sun, directly and indirectly with the heat reflection from the famed mountain range
http://www.wineterroirs.com/2008/09/legion_wine.html

not sure whether this is what it's about:
Geodynamics of the lithosphere: an introduction - Google Books Result
Kurt Stüwe - 2007 - Mathematics - 493 pages
This is called heat refraction. Eq. 3.7 can also be written in differential ... As a consequence, it is conceivable that the process of heat refraction will ...
books.google.co.uk/books?isbn=3540712364...
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