Harvest Climate: Temperature & Precipitation

Summary:
September and October are the harvest months for winegrapes in the Okanagan Valley. Precipitation and temperature affect the quality and harvest time of the winegrapes. A rainy harvest season may dilute the winegrapes and decrease the overall quality of the yield while a warm harvest season may cause earlier harvest dates.

Both temperature and precipitation for September and October are in the following maps of the Okanagan Valley of British Columbia, Canada.

More information about these maps can be found below, here

Mean Minimum Daily Temperatures: September

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 Minimum Daily Temperatures: October

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

Accumulated Precipitation: September

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

Accumulated Precipitation: October

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

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 Minimum Daily Temperature Anomalies:
      • September: the historical average temperature is 7.5 °C, with warming temperature rises:
        • Moderate Warming: 4.8 °C
        •  High Warming: 8.3 °C
      • October: the historical average temperature is 2.7 °C, with warming temperature rises:
        • Moderate Warming: 3.6 °C 
        • High Warming: 5.8 °C
    • Accumulated Precipitation Anomalies:
      • September: the historical average precipitation is 29 mm, with warming precipitation changes:
        • Moderate Warming: -3 mm 
        • High Warming: -5 mm
      • October: the historical average precipitation is 20 mm, with warming precipitation changes:
        • Moderate Warming: 4 mm
        • High Warming: 6 mm

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.