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Residual NBS
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Direct Observations of Evaporation
MESH Component NBS
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Hydroclimate Synthesis and Summary

Closing the Great Lakes Water Balance using Environment Canada's MESH Model and GLERL NBS Estimates

Vincent Fortin;Erika Klyszejko, Alain Pietroniro
In this project a methodology was proposed for projecting the five-year MESH hindcast of component net basin supplies further into the past using GLERL component NBS estimates, in order to explore whether uncertainty in component NBS, as assessed from differences between GLERL and MESH component NBS, is sufficient to explain systematic differences with residual NBS and move closer to closing the Great Lakes water balance. The back-projected MESH NBS were found to agree better with residual NBS than GLERL component NBS for all lakes.
Back-Projection of MESH Component NBS using GLERL Estimates
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MESH Back Projection (MBP) NBS Data
GLERL component NBS to back-project MESH component NBS
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Supporting Content (Show)
Main Topics
Hydroclimate Information
Questions We Asked
What are the historical NBS estimates & how have changes affected lake levels?
Key Findings
Increasing evaporation and precipitation are offsetting, except on Superior
Improve understanding of hydroclimatic processes & impacts
Assessing Reliability of Historical Data