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Mass Balance & Modelling (Modelled SMB Budget (Gardner et al 2011,…
Mass Balance & Modelling
Modelled SMB Budget
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Queen Eliz Islands, Canadian High Arctic
Importance MB Monitoring
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Glacier response effects
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e.g. glacier fed water supplies, irrigation schemes, HEP, global sealevel
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Models require:
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3. Apply flow law
Glens flow law which applies:
surface grad, ice thickness & hardness
Role Numerical Models
Relate climate ∆ to ELA / mass balance ∆ to investigate
- past climate & glacier response
- future climate ∆ & glacier response
(Golledge & Hubbard, 2011)
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Value of modelling
- Shows which factors / controls = most important
- Reveal great variability of individual glacier response to climate
- Allow investigation magnitude of different controls
Why models
= useful
- Can hold factors constant
∴ study controls in isolation
- Reveal responses to given forcings vary greatly
- btwn individual glaciers
- in time (response times vary)
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