Icewine fingerprint involved in latitude under climate change
Résumé
Aroma plays a crucial role in determining icewine quality and influencing the profit of growers, but the influence of climate change on icewine sustainable production and the diversity of aroma volatiles in icewine among different regions are unknown. Here, we employed aroma volatiles of 8 Vidal icewines from 2 typical premium production regions (Liaoning in China and Ontario in Canada) and an emerging low-latitude mountainous area (Yunnan in China) to project future diversity and sustainability. We found that Ontario and Yunnan's icewines were characterized with intense apricot or peach and tropical fruit aromas, which was consistent with the excellent grade icewine around the world based on 225 icewine aroma datasets from 5 countries. Icewine from Liaoning was abundant with honey flavor. Moreover, projections suggested a northward trend of 3.5 degrees N and 6 degrees N in Ontario during near future (2021-2050) and far future (2070-2099) periods, respectively. However, Liaoning province might have more challenges for premium icewine production under the worst climate warming scenario. Notably, the lower latitude and higher altitude region, Yunnan province, would sustainable provide special premium icewine with a northward expansion of icewine production region to 28.5 degrees N under climate change. The findings provide theoretical support in relieving climate change challenges to premium icewine availability and stability.