Growing Season: Extreme Heat

Summary:
Winegrape varieties have different heat tolerances. Extreme heat in the summer months may be damaging to certain varieties. Choosing the best variety for a vineyard may account for the maximum summer temperatures. The Mean Maximum Daily Temperatures for the summer months are displayed in the maps below for the Okanagan Valley of British Columbia, Canada.

More information about these maps can be found below, here

 

Mean Maximum Daily Temperatures: June

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Value Comparison Legend:
MW: Moderate Warming Scenario
HW: High Warming Scenario
Value Comparison Legend:
MW: Moderate Warming Scenario
HW: High Warming Scenario

Mean Maximum Daily Temperatures: July

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Value Comparison Legend:
MW: Moderate Warming Scenario
HW: High Warming Scenario
Value Comparison Legend: MW: Moderate Warming Scenario HW: High Warming Scenario

Mean Maximum Daily Temperatures: August

Features: Zoom Control: Zoom Measuring Tool: Zoom Layer Control: Zoom
Value ComparisonLegend:
MW: Moderate Warming Scenario
HW: High Warming Scenario
SD Comparison Legend:
MW: Moderate Warming Scenario
HW: High Warming Scenario

Mean Maximum Daily Temperatures: September

Features: Zoom Control: Zoom Measuring Tool: Zoom Layer Control: Zoom
Value Comparison Legend:
MW: Moderate Warming Scenario
HW: High Warming Scenario
SD Comparison Legend:
MW: Moderate Warming Scenario
HW: High Warming Scenario

More Information

Anomalies:
Anomalies are a metric which highlight the change in a variable from the recent historical average (1970 – 1989). Positive values indicate a projected increase from the past.

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.

Average Anomalies (Warming Scenario – Historical): 

Mean Maximum Daily Temperature Anomalies:

      • June: the historical average temperature is 23.7 °C, with warming temperatures rise:
        • Moderate Warming: 5.3 °C
        • High Warming: 7.9 °C
      • July: the historical average temperature is 26.9 °C, with warming temperatures rise:
        • Moderate Warming: 7.5 °
        • High Warming: 11.5 °C
      • August: the historical average temperature is 26.7 °C, with warming temperatures rise:
        • Moderate Warming: 6.1 °C
        • High Warming: 9.9 °C
      • September: the historical average temperature is 20.3 °C, with warming temperatures rise:
        • Moderate Warming: 5.9 °C
        • High Warming: 9.6 °C

General Circulation Models (GCMs):
We leverage prediction from General Circulation Models (GCMs) created by climate scientists worldwide. These models are designed to predict how environments are likely to change using atmospheric physics to project future temperatures, precipitation, and more variables for different greenhouse gas emission scenarios. Currently, each scenario is categorized by Representative Concentration Pathways, summarizing how emissions change through 2100. The RCP with the greatest emissions (RCP 8.5) was used to generate the data shown in the maps. A consensus on climate variables was reached by using an ensemble of 15 GCMs.