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Unit 2 Sources of Sea Level Rise
- 1. This work is supported by the National Science Foundation’s Directorate for Education and Human Resources TUES-1245025, IUSE- 1612248, IUSE-1725347, and IUSE-1914915. Questions, contact education-AT-unavco.org SOURCES OF SEA-LEVEL RISE What are sources of sea-level rise in addition to thermal expansion? Version: Jan 16, 2019
- 2. SEA LEVEL HAS CHANGED A LOT THROUGHOUT EARTH’S HISTORY • Brainstorm processes that cause sea level to change Modified from: http://www.bgs.ac.uk/discoveringGeology/climateChange/general/coastal.html?src=topN av
- 3. PROCESSES THAT CAUSE SEA LEVEL TO CHANGE
- 4. WHICH PROCESS DO YOU THINK IS CURRENTLY CAUSING THE MOST SEA-LEVEL RISE? A. Changes in terrestrial water storage B. Subsidence in coastal regions C. Ocean circulation changes D. Warming ocean causing water to expand E. Melting of glaciers F. Melting of ice sheets
- 5. GLOBAL MEAN SEA-LEVEL BUDGET
- 6. GLOBAL MEAN SEA-LEVEL BUDGET SUMMARIZED 0 0.2 0.4 0.6 0.8 1 1.2 Thermal Expansion Glaciers Ice sheets Land Water Storage Sealevel(mm/yr)1993–2010
- 7. WHICH PROCESS DO YOU THINK IS CURRENTLY CAUSING THE MOST SEA-LEVEL RISE? A. Changes in terrestrial water storage B. Subsidence in coastal regions C. Ocean circulation changes D. Warming ocean causing water to expand E. Melting of glaciers and ice sheets F. Melting of ice sheets
Editor's Notes
- Modified from: http://www.bgs.ac.uk/discoveringGeology/climateChange/general/coastal.html?src=topNav Here discuss that sea level has changed over time. The ma on the x-axis represents millions of years ago. Have students brainstorm why sea level has changed over time (this can be done as a think-pair-share activity). Compile the classes answers and follow up with the next slide, which summarizes causes of sea-level change.
- http://www.ipcc.ch/ipccreports/tar/vol4/english/fig3-4.htm
- IPCC 2014 This table provides data of the contributions from thermal expansion, glaciers and ice sheets, and land water storage to sea-level rise from observations (above) and models (below).
- This summarizes the information from the table in the previous slide and demonstrates that thermal expansion is the largest source (do note that glaciers + ice sheets exceeds thermal expansion). Instructors may want to hold off on presenting this information, as Unit 3 of this module further explores sea-level contributions from ice sheets.