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- Glacier_mass_balance abstract "Crucial to the survival of a glacier is its mass balance or surface mass balance (SMB), the difference between accumulation and ablation (sublimation and melting). Climate change may cause variations in both temperature and snowfall, causing changes in the surface mass balance. Changes in mass balance control a glacier's long-term behavior and are the most sensitive climate indicators on a glacier. From 1980-2012 the mean cumulative mass loss of glaciers reporting mass balance to the World Glacier Monitoring Service is -16 m. This includes 23 consecutive years of negative mass balances.A glacier with a sustained negative balance is out of equilibrium and will retreat, while one with a sustained positive balance is out of equilibrium and will advance. Glacier retreat results in the loss of the low elevation region of the glacier. Since higher elevations are cooler than lower ones, the disappearance of the lowest portion of the glacier reduces overall ablation, thereby increasing mass balance and potentially reestablishing equilibrium. However, if the mass balance of a significant portion of the accumulation zone of the glacier is negative, it is in disequilibrium with the local climate. Such a glacier will melt away with a continuation of this local climate.The key symptom of a glacier in disequilibrium is thinning along the entire length of the glacier. For example, Easton Glacier (pictured below) will likely shrink to half its size, but at a slowing rate of reduction, and stabilize at that size, despite the warmer temperature, over a few decades. However, the Grinnell Glacier (pictured below) will shrink at an increasing rate until it disappears. The difference is that the upper section of Easton Glacier remains healthy and snow-covered, while even the upper section of the Grinnell Glacier is bare, melting and has thinned. Small glaciers with shallow slopes such as Grinnell Glacier are most likely to fall into disequilibrium if there is a change in the local climate.In the case of positive mass balance, the glacier will continue to advance expanding its low elevation area, resulting in more melting. If this still does not create an equilibrium balance the glacier will continue to advance. If a glacier is near a large body of water, especially an ocean, the glacier may advance until iceberg calving losses bring about equilibrium.".
- Glacier_mass_balance thumbnail Glacier_Mass_Balance.png?width=300.
- Glacier_mass_balance wikiPageExternalLink antarctic-ice-sheet-surface-mass-balance.
- Glacier_mass_balance wikiPageExternalLink introduction-glacier-mass-balance.
- Glacier_mass_balance wikiPageExternalLink index.html.
- Glacier_mass_balance wikiPageID "4186046".
- Glacier_mass_balance wikiPageRevisionID "602653699".
- Glacier_mass_balance hasPhotoCollection Glacier_mass_balance.
- Glacier_mass_balance subject Category:Effects_of_global_warming.
- Glacier_mass_balance subject Category:Glaciology.
- Glacier_mass_balance type Consequence111410625.
- Glacier_mass_balance type EffectsOfGlobalWarming.
- Glacier_mass_balance type Phenomenon100034213.
- Glacier_mass_balance type PhysicalEntity100001930.
- Glacier_mass_balance type Process100029677.
- Glacier_mass_balance comment "Crucial to the survival of a glacier is its mass balance or surface mass balance (SMB), the difference between accumulation and ablation (sublimation and melting). Climate change may cause variations in both temperature and snowfall, causing changes in the surface mass balance. Changes in mass balance control a glacier's long-term behavior and are the most sensitive climate indicators on a glacier.".
- Glacier_mass_balance label "Bilancio di massa del ghiacciaio".
- Glacier_mass_balance label "Glacier mass balance".
- Glacier_mass_balance label "Massenbilanz (Glaziologie)".
- Glacier_mass_balance sameAs Massenbilanz_(Glaziologie).
- Glacier_mass_balance sameAs Bilancio_di_massa_del_ghiacciaio.
- Glacier_mass_balance sameAs m.0bnvyd.
- Glacier_mass_balance sameAs Q3528741.
- Glacier_mass_balance sameAs Q3528741.
- Glacier_mass_balance sameAs Glacier_mass_balance.
- Glacier_mass_balance wasDerivedFrom Glacier_mass_balance?oldid=602653699.
- Glacier_mass_balance depiction Glacier_Mass_Balance.png.
- Glacier_mass_balance isPrimaryTopicOf Glacier_mass_balance.
