Development of Ontario Climate Divisions

Funded by The Great Lakes Observing System (GLOS)

Project Summary

Consistent, standardized analysis of historical climate changes and future projections are critical to all of GLISA’s work. In our experience, climate stations (location-based) and climate divisions (multi-county scale) are useful spatial scales for presenting summaries of past, current, and future climate changes. The climate divisions, as defined by NOAA for the U.S., represent an intermediate spatial scale that has proven valuable to many of GLISA’s partners and often a good starting point for describing sub-regional climate changes. But there is no equivalent set of boundaries for Canada. As part of our Great Lakes Adaptation Data Suite (GLADS), we are convening a working group of Canadian partners to develop the spatial boundaries for climate divisions in Ontario to better serve stakeholders in Canada. We will share the new boundaries with other organizations, packaging Ontario climate data as a new, vetted, spatial scale for local and regional climate change analysis and adaptation.

Project Accomplishments

  • A shapefile of Ontario climate divisions;
  • White paper describing the development process;
  • Climate projections for Ontario’s climate divisions available on GLISA’s website and in GLADS.

GLISA Contribution

GLISA was the grantee for this project through funding from The Great Lakes Observing System (GLOS). GLISA coordinated the working group of Ontario partners, led discussions with our partners, and synthesized working group ideas to create climate divisions for Ontario.

Project Partners

  • Aquanty
  • Ouranos
  • Canadian Forest Service
  • Climate Risk Institute
  • Environment and Climate Change Canada
  • Grand River Conservation Authority
  • Maitland Valley Conservation Authority
  • Toronto and Region Conservation Authority

GLISA Contact

Laura Briley, Climatologist,

Omar Gates, Climatologist,