Science 10 September 2026

Study links higher-altitude vineyards to slower warming effects

Source: International Organisation of Vine and Wine (OIV)

Altitude threshold Above 600 m

Warming difference Significantly slower than lowland sites

Published by OIV (peer-reviewed)

Relevance Strategic site selection under climate change

A peer-reviewed study published by the International Organisation of Vine and Wine (OIV) has found that vineyards situated above 600 metres elevation are experiencing significantly slower increases in growing-season temperatures compared to lower-altitude sites in the same wine regions. The finding has direct implications for long-term vineyard site selection and the capacity of existing high-altitude regions to maintain wine quality under continuing climate change.

The study analysed temperature records from over 1,200 vineyard weather stations across Europe, South America, South Africa and Australia, comparing warming trends between sites above and below 600 m over a 40-year period. The pattern was consistent across all regions examined: above 600 m, average growing-season temperature increases were between 30% and 45% smaller than at comparable lowland sites in the same country or region.

What this means for wine producers

For established wine regions facing rising temperatures — Languedoc, southern Rhône, Barossa, McLaren Vale — the study strengthens the commercial case for acquiring or developing higher-altitude plots within their region as a hedge against continued warming. In Burgundy, where plot-level variation is already well-mapped, the data supports the quality premium attached to well-drained mid-slope sites that combine elevation with aspect benefits.

For emerging wine regions, the study suggests that altitude is one of the most powerful tools available for enabling quality wine production in areas that would otherwise be too warm. This is visible in practice in Argentina's Salta region (vineyards above 1,700 m), in parts of China's Yunnan province, and increasingly in Ethiopia's Rift Valley highlands. The Cool and warm climate styles guide explains the underlying mechanisms by which altitude — and temperature generally — shapes wine character.

Diurnal variation: the extra benefit

The study also confirmed a secondary benefit of high-altitude sites: greater diurnal temperature variation (the difference between daytime and night-time temperatures). Large day-to-night swings — often 15–20 °C at high altitude compared to 8–12 °C in lowland regions — allow grapes to accumulate sugar and phenolic ripeness during warm days while retaining natural acidity during cool nights. The result is grapes with both ripe fruit character and structural freshness — the combination that produces wines capable of ageing. For how altitude interacts with appellation rules, see the Appellations explained guide.

Source: International Organisation of Vine and Wine (OIV), September 2026. See also: IPCC (climate change and agriculture projections); AWRI (climate adaptation research for wine regions). Published 10 September 2026. Corrections via the contact form.

Questions

About altitude and climate.

Why do higher-altitude vineyards warm more slowly?

At altitude, temperatures are lower by approximately 0.6 °C per 100 metres of elevation (the standard atmospheric lapse rate). This baseline cooler temperature acts as a buffer against rising averages: the same absolute increase in temperature has a proportionally smaller effect on the growing season when the starting point is cooler. Additionally, high-altitude sites often experience greater diurnal temperature variation — warm days followed by cold nights — which preserves natural acidity and aromatic complexity in grapes. The OIV paper models these dynamics across multiple regions including the Alps, Andes, Iberian Meseta and Atlas Mountains.

Which wine regions already exploit altitude for freshness?

Many major high-quality regions use altitude deliberately. Mendoza (Argentina) produces its best Malbec above 900 m; the Cafayate sub-region in Salta grows Torrontés and Malbec above 1,700 m. In Spain, Ribeira Sacra's steep gorges and Priorat's slate terraces both benefit from altitude-moderated temperatures. In Italy, Alto Adige (Südtirol) vineyards can reach 1,000 m. In South Africa, Elgin and Hemel-en-Aarde sit at elevation, producing some of the country's freshest Pinot Noir and Chardonnay. For how altitude interacts with climate broadly, see the Cool and warm climate styles guide.

What does the OIV do and why does its research matter?

The OIV (Organisation Internationale de la Vigne et du Vin) is an intergovernmental organisation with 49 member states that sets standards and conducts scientific research on viticulture, oenology and wine economics. Its technical publications are peer-reviewed and widely cited by wine scientists and regulators. OIV data on global production, consumption and trade is used by the WSET, Decanter and government agricultural bodies as the authoritative source for wine statistics.

Are wine producers already planting at higher altitudes in response to climate change?

Yes — this is a documented trend. In Rioja, producers have been acquiring vineyards in the higher-altitude Rioja Alta and Rioja Alavesa subzones, where temperatures remain cooler than the increasingly hot Rioja Baja. In Burgundy, the BIVB has noted that Côte de Nuits grand cru plots sit on mid-slope positions that benefit from both drainage and slight altitude. In Australia, the Clare Valley and Eden Valley are seeing renewed investment precisely because of their elevation. Some producers in Tuscany are now planting Sangiovese significantly above traditional ranges. For the news context on a specific elevated region, see Ribeira Sacra gains DOCa status.

Could climate change open entirely new wine regions at high altitude?

This is already happening at the margins. Parts of the Ethiopian highlands, Himalayan foothills (Yunnan, China), and high-altitude Moroccan regions are seeing commercial viticulture become viable. In Europe, high-altitude sites in Scandinavia, Scotland and Poland are being planted experimentally. The OIV's data shows that global vineyard area at elevations above 500 m increased by around 8% between 2010 and 2024, compared to flat growth overall. For the most visible example of a new cool-climate region succeeding, see English sparkling wine record exports.