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CLIMATE CHANGE, SEA-LEVEL RISE and COASTAL GEOLOGIC HAZARDS
The document discusses the impacts of climate change on sea-level rise and coastal geological hazards in Rhode Island, focusing on the analysis of glacial deposits and projected future scenarios. It presents data on geological shore zone types, predicted tidal heights, and the accelerating rates of global sea level rise linked to temperature increases. Additionally, it emphasizes the need for understanding these changes to prepare for future environmental challenges in coastal areas.
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CLIMATE CHANGE, SEA-LEVEL RISE and COASTAL GEOLOGIC HAZARDS
- 1. CLIMATE CHANGE, SEA-LEVELRISE and COASTAL GEOLOGIC HAZARDS URI Climate Change Symposium 5 May 2011 Jon C. Boothroyd Rhode Island State Geologist, Research Professor Emeritus – Quaternary Geology ------------- Rhode Island Geological Survey and Department of Geosciences College of the Environment and Life Sciences University of Rhode Island jon_boothroyd@uri.edu
- 2. Laurentide Ice FlowDirections You are here - Stone and Sirkin, 1996
- 3. Map Generated By: BAOakley and JC Boothroyd
- 4. Oakley, 2011 Charlestown Moraine Ice margins modified from: Dyke and Prest, 1987 Ridge, 2010; Goss, 1993 Smith, 2010
- 5. Oakley, 2011 Ice margins modified from: Dyke and Prest, 1987 Ridge, 2010; Goss, 1993 Smith, 2010
- 6. Granitic Till Upland QUATERNARY DEPOSITS OF RHODE ISLAND Thick Stratified Deposits Narragansett structural basin Compact Till Upland EXPLANATION Stratified Material Till End Moraine - Till and You are here Stratified Material Miles 0 5 10 15 Block Island Kilometers Complex 0 5 10 20 30
- 7. Braided River ona Delta Plain A GLACIAL DEPOSITIONAL - ENVIRONMENT
- 8. Facies Deposited ina Glacial Lake Depositional Environment Imbricated Gravel Facies deposited on a delta plain Stratified Coarse- Stratified Coarse- - Medium Sand Facies Medium Sand Facies deposited on a delta deposited on a delta slope slope
- 9. Eustatic Sea-Level Rise + Isostatic Rebound Laurentide at Ice Sheet? Laurentide 2m.100yr-1 Ice Sheet? Block Island 2m.100yr-1 Antarctic Antarctic Ice Ice Sheet? Sheet? 2-5m.100yr-1 2-5m.100yr-1 Explanation Oakley and Boothroyd, in prep 2011
- 10. Post-Glacial Lake Atlantic Ocean
- 11. Post-Glacial Lake Estuary Atlantic Ocean
- 12. - 4 mbelow present 5,000 yBP
- 13. The Sea MayBe Rising – But….. Narragansett Pier Seawall – Patriots Day 2007 WPRI.com 16 apr 2007
- 15. GEOLOGIC SHORE ZONETYPES Percent • Beach Plain and Barrier Spit 25 • Glacial Stratified Bluff 8 • Till Bluff 23 • Metamorphosed Sedimentary Bedrock 8 • Igneous and Other Meta Bedrock 5 • Discontinuous Bedrock 1 • Shoreline Protection Structure 30
- 16. Southeast Wind Northeast Wind From Wright and Sullivan, 1982
- 17. Patriots Day ExtratropicalStorm – April 2007 Newport Tide Gauge SET UP PREDICTED http://tidesandcurrents.noaa.gov/ STORM SURGE data_menu.shtml?stn=8452660%20Newport,%20RI&type=Tide+Data
- 18. Overwash - Browning Cottages RE Hehre
- 19. Frontal Erosion -Browning Cottages BA Oakley
- 20. Frontal Erosion 1939-2006- Browning Cottages 2006 1939
- 21.
- 22. Tidal Datums Newport HEIGHT NOW New MSL Old “MSL” Adapted from: www.ngs.noaa.gov/newsys-cgi- bin/ngs_opsd.prl?PID=LW0493& EPOCH=1983-2001
- 23. How High willthe Water Be? Boothroyd and Hehre 2008 9.46 Feet Above MHHW Tidal Heights Newport Adapted from: www.ngs.noaa.gov/newsys-cgi- bin/ngs_opsd.prl?PID=LW0493&EPOCH=1983-2001
- 24. Frequency…? Next Month…. Next Year Adapted from NOAA; USACE 1988; Hehre 2007
- 25. Charlestown Beach ves rge plus Wa rS torm Su 100 yea Overwash RE Hehre
- 26. Charlestown Beach, RI StormSurge Overwash With Washover Fan Feb 1985
- 27. Charlestown Beach –Hurricane Bob 1991 Washover Fan Deposition Removal is a Bad Idea ……. Barriers Naturally Retreat Landward and Upward Aug 1991
- 28. Lastly, Climate Change and the Future Shore Zone of Rhode Island
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- 30. THE HOCKEY STICK Temp lags CO2 Medieval Warm Little Ice Period Age Moberg et al, 2005
- 31. Greenland Outlet Glaciers Change from Polythermal to Warm Based A Key to Future Sea-Level Rise Brathwaite, 2002
- 32. HEIGHT NOW Adapted from: http://tidesandcurrents.noaa.gov/sltrends/ sltrends_station.shtml?stnid=8452660%20Newport,%20RI Boothroyd 2011
- 33. Observed Global SeaLevel Rise ... Accelerating ter i me IPCC 18 cm rise since 1900 e Alt 2001 Current rate: llit 3.3 cm per decade Sate estimate es Gaug Tide Rahmstorf, Cazenave, Church, Hansen, Keeling, Parker and Somerville (Science 2007)
- 35. Global Sea LevelLinked to Global Temperature Projection of Sea-Level Rise 1990 - 2100 Using IPCC 2007 Temperature Projections Extreme Projection IPCC 2007 Vermeer and Rahmstorf, 2009, PNAS, v106, p 21537-21532
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- 39. Ninigret – GreenHill Lagoons 2003 – 2004 Orthophoto
- 40. Ninigret – GreenHill Lagoons 1938 Storm Surge + SL Rise 11 ft above MHHW
- 41. Ninigret – GreenHill Lagoons 1938 Storm Surge + SL Rise 11 ft above MHHW
- 42. Ninigret – GreenHill Lagoons 2003 – 2004 Orthophoto
- 43. Ninigret – GreenHill Lagoons 2100 Inundation – 5 ft 200 ft Barrier Migration
- 44. Ninigret – GreenHill Lagoons 2100 Inundation – 5 ft 200 ft Barrier Migration
- 45. Coastal Rhode Island– A Common View of the Future Don Bousquet, June 2008