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The Stressed Yeast Society
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WSET School, London
Lavinia Cremonese / Florence
Lynn de Vries / Amsterdam
Mark Haigh / London
Irene López / Bilbao
Sophie Milnes / London
Miguel Silva / Lisbon
Peder Sortland / Stavanger
Jennifer Thörn / Stockholm
Ben Thuriaux-Alemán / Brighton
Margriet Vande Zande / Beaconsfield
4.9 - 5.0
Stellar+
4.6 - 4.8
Stellar
4.3 - 4.5
Remarkable
4.0 - 4.2
Worthy
3.5 - 3.9
Decent
(Ad-hoc)
Disappointing
Logroño (La Rioja)
Spain
18-23 June 2026
The Greyhound Beaconsfield
UK
2025
Madeira
Portugal
2024
Barahonda
D.O. Yecla
YeclaCENTURY-OLD & FORWARD-LOOKING
[More...]
Dominical R
2021
Prior Lucas
BairradaEVERYTHING IN ITS RIGHT PLACE
[More...]
The Corridor Pinot Noir
2019
Authentique Wine Cellars
Willamette ValleyOREGON, COMPOSED
[More...]
2014
Egon Müller
Mosel
STEEP SLOPES AND PRECISE FRUIT
[More...]
BELOW THE CAP
Diego Calderon
I. Latitude as a Scaffold
Maps situate places in relation to each other through representation and abstraction. While most of the maps we encounter today are structured by political boundaries, there is a deeper, quieter framework established by the parallel.
Let us then consider the potential of the map as a diagram of solar incidence and planetary physics: one where proximity to the ocean, geology, altitude, and winds are absent; one where appellation is reduced to an outline; one where the Old and New World paradigm is of no consequence.
II. Parallel Mechanics
The realm of latitude is that of photoperiod, UV index, and the geometry of sunlight. Much in line with an architectural section drawing, a latitude map provides an objective, measurable basis for factors such as day length and angle of incidence before any site-specific disruption occurs. For example, the Mosel at 48°N benefits from up to 16 hours of diffuse daylight, driving gradual photosynthetic buildup at lower temperatures. Conversely, at 32°N, the Valle de Guadalupe in Mexico gets shorter days that are nonetheless balanced by steeper, more intense radiation. The architecture of the vine has traditionally responded to these conditions: protection from vertical incidence at low latitudes (e.g., pergola, bush vine) versus aiding interception in lower-angled, higher-latitude locations (e.g., VSP).
III. Exception as Proof
It is precisely the factors excluded from our latitude map that obtain a renewed clarity through their absence. One of the best-known cases is that of Salta, famously outside the traditional band. Here, the disruptor is altitude, compensating for low latitude with the decrease in temperature brought by elevation. A similar case is the less-known Valle de Parras in Mexico—home to the oldest operating winery on the continent—which mirrors Salta at 25°∘. This compensation of low latitude with high altitude is not straightforward: UV intensity reaches levels rarely seen elsewhere, and the vine’s production of phenolic compounds and anthocyanins serves as its own natural sunblock. In most other cases, natural factors act as the ‘decoupler’ between a site and its parallel: mountain ranges, cold ocean currents, and rain shadows.
IV. Hemispheric Rhymes
One of the most compelling outcomes of this exercise is the direct comparison of corresponding latitudes north and south. Again, the objective is not to reduce the vast complexity of viticulture to diagrammatic dogma. On the contrary, it invites us to ask why grapes subject to an equivalent solar regime can be so different, and to look closely for manifestations related to latitude alone.
If we consider a high latitude—45°∘—we find the Northern Rhône (N) and Central Otago (S) sharing the same amount of summer daylight, struck at the same low angle. Yet they remain fundamentally distinct.
The slow, gradual ripening of the Northern Rhône is sustained by the lowering autumn sun and months of fading daylight, in a region sheltered by a vast continental landmass. Conversely, Central Otago—the southernmost wine region in the world—is considerably more exposed, protected only by the Southern Alps. While in the former the continental buffer counterbalances latitude, in the latter raw exposure and incisive UV incidence offset marginality: savoury, tertiary potential versus bright, resolute fruit clarity .
At a lower latitude (33°), consider the valleys of Guadalupe (N) and Barossa (S). Their position along these parallels speaks to vertical solar incidence, low-range continentality, and heat as an ever-present hazard.
In Baja, only intermittent marine breezes cool the baking soils. The broad range of varieties grown relies heavily on canopy architecture to provide shade, preventing both the raisining of fruit and the total combustion of natural acidity. In Barossa, the absence of altitude or cooling currents traps heat continuously, yielding wines of an unctuous character and remarkably high potential alcohol.
V. A Shifting Frontier
A final reflection turns to the ever-increasing exceptions to the traditional rule, and the accelerating case for remapping viticultural boundaries. This shifting border—where at the lower margins water deficits, extreme sunburn, and plummeting yields coincide with an expanding northern frontier (the UK, Poland, Scandinavia)—serves as a tangible register of a rapidly changing climate. While the latitude map describes baseline conditions immune to change (such as the angle of solar incidence), its primary value may lie in revealing how different regions respond to it, whether through natural adaptation or human intervention. At this pace, however, the map will soon require updating: widening to accommodate higher latitudes while regarding lower-latitude outposts with mounting concern.
An intriguing extension of this exercise would be the production of a complementary map, in which external factors—altitude, maritime proximity, prevailing winds—exert a gravitational pull northward or southward upon each region, visualising their true climatic departure from their parallel.
-DC
1 The strict plural of datum is data, which nonetheless tends to read ambiguously in this context.
2 Casa Madero, est. 1597.
3 All varietal differences considered.