Sea level has changed A LOT throughout Earth’s history In groups, brain-storm about process that cause sea level to change (you should think of at least 4) Modified from: http://www.bgs.ac.uk/discoveringGeology/climateChange/general/ coastal.html?src=topNav
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Sea level has changed A LOT throughout Earth’s history
In groups, brain-storm about process that cause sea level to change (you should think of at least 4)
Which process do you think is currently causing the most sea level rise?
A. Changes in terrestrial water storageB. Subsidence in coastal regionsC. Ocean circulation changesD. Warming ocean causing water to expandE. Melting of glaciers and ice sheets
Which process do you think is currently causing the most sea level rise?
A. Changes in terrestrial water storageB. Subsidence in coastal regionsC. Ocean circulation changesD. Warming ocean causing water to expandE. Melting of glaciers and ice sheets
Measured contributions vs. observed rates of sea level rise• Thermal expansion currently accounts for roughly
half of the observed sea level rise;
• While Greenland and Antarctica have the potential to contribute substantial amounts of ice (around 120m of global sea level if they both completely melted), their current contribution is dwarfed by small mountain glaciers and ice caps;
• Sea level rise that is measured with satellites and tide gauges is larger than the sum of the components. This discrepancy highlights the need for additional measurements!
http://www.grida.no/graphicslib/Author: Hugo Ahlenius, UNEP/GRID-Arendal