Dormancy to Budburst: Extreme Lows

During the winter, winegrapes enter the dormancy stage of their seasonal lifecycle. As the air temperature cools throughout the winter months, the risk of injury from extreme cold increases. A useful metric to account for the risk of cold injury is the minimum daily temperatures that the plants may experience. 

The maps below have three tabs, each shows the same information but allows you to visualize it in a slightly different way. 

    • One the first tab (Interactive) you can zoom in and out. Importantly you can see the warming scenarios by clicking on the small square showing three layers in the upper right corner of the map; for best viewing we recommend checking only one box at a time of the three options (Historical, Moderate warming, High warming). This box also lets you change the underlying map (basic topographic or  imagery, which gives satellite views).
    • The middle tab (Compare Warming Scenarios) shows the historical, moderate warming and high warming scenarios side-by-side for easy comparison.
    • The right tab (Anomalies) shows how much of a change occurs from the recent (historical) past versus the moderate (MW) and high (HW) warming scenarios. 
More information about these maps can be found below, here. 

Minimum Temperatures: December to February

Minimum Temperatures: March

Minimum Temperatures: April

More Information

Warming Scenarios: Two warming scenarios are represented in the data. The Moderate Warming (MW) and High Warming (HW) scenarios are represented by averaging the data for the periods of years between 2040 – 2059 and 2070 – 2089, respectively. These warming scenarios represent two instances in the spectrum of potential climate realizations. These warming scenarios represent projected future climate based on a high emissions scenario at two timepoints in the future. For more information on the climate scenarios see, About.


Funding for the climate maps component of this project has been provided in part by the Canada Research Chair in Temporal Ecology and in part by the governments of Canada and British Columbia under the Canadian Agricultural Partnership, a federal-provincial-territorial initiative.
Funding is administered by the Investment Agriculture Foundation of BC. This project is part of the Farm Adaptation Innovator Program delivered by the Climate & Agriculture Initiative BC.