Climate Change: Sea Level Rise. Climate Change Weather vs. Climate Weather: day to day changes in...
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Transcript of Climate Change: Sea Level Rise. Climate Change Weather vs. Climate Weather: day to day changes in...
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Climate Change:Sea Level Rise
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Climate ChangeWeather vs. Climate
Weather: day to day changes in temperature, rainfall, cloudiness, moisture
Climate: long term changes in weather patterns on our planet
Effects of climate change: Sea level rise (today’s activity)Warmer sea surface temperaturesDrought (water shortage), flooding
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Pacific Islands Ocean Observing System
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Divers work on sensors at the Kilo Nalu Reef Observatory which
monitor water quality and temperature
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HIOOS Coastal Wave
Buoy Measurements
Wave buoys monitor wave
height, direction, and period around
the Pacific Ocean
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CO2 Buoy – South Shore Oahu
Photo courtesy of R. David Beales, UH Creative Services
TemperatureCarbon Dioxide
SalinityOxygen
ChlorophyllTurbidity
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HIOOS Coastal Wave
Buoy Measurements
Sea Level Stations
Tide gauge stations all over the world continuously monitor water level
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CO2 and Climate ChangeGreenhouse effect – makes
life on Earth possibleCO2 comes from natural
and man made sources:Natural: animal respiration,
volcanoesMan made: burning fossil
fuels (cars, planes, electricity), deforestation (cutting/burning trees)
Too much CO2 causes too much warming
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What affects sea level on short time scales?•Tides
•Weather • storms, hurricanes, waves
•El Nino • can lower or raise sea level depending on location
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What causes global sea level rise?Climate Change
Increasing temperatures cause melting ice in alpine glaciers, Greenland, and Antarctica
Warming causes thermal expansion of ocean water – like air and other fluids, water expands as the temperature increases
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Types of iceLand-based ice
(freshwater)Glaciers, icebergsIce sheets (Antarctica and
Greenland)Alpine (mountain) ice
Sea ice (seawater)Forms in the sea as water
freezesFloating in water
Glacier
Alpine Ice
Sea Ice
Photo credit: NSIDC
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What are the effects of sea level rise?
Coastal flooding
Contaminating drinking water with seawater
Increases impact of storms
Increases risk of coastal erosion
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Future Sea Level RisePrediction: Sea
level will rise 1 m (3.3 ft) in the next 100 years
Many areas in Hawaii are close to sea level
Data from UH Coastal Geology Group