Geography and Oceanography - Chapter 18 pdf

Today’s Tune
Today’s Tune
“
“
This is the Sea”
This is the Sea”


by The Waterboys
by The Waterboys
Next Midterm
Next Midterm
Monday, May 16, 2011, 1:00
Monday, May 16, 2011, 1:00

Here in Gilfillan Auditorium, closed book
Here in Gilfillan Auditorium, closed book

Same format as Test 1
Same format as Test 1

Bring #2 pencil
Bring #2 pencil

Study Guide POSTED on main class web
Study Guide POSTED on main class web
site:
site:


/> />Transformation of Wind-Driven

Transformation of Wind-Driven
Deep-water Waves
Deep-water Waves
Transformation of Wind-Driven
Transformation of Wind-Driven
Shallow-water Waves
Shallow-water Waves


Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Photography by Clark Little
Tsunamis
Tsunamis

Sudden shifting of the ocean floor
Sudden shifting of the ocean floor
due to earthquakes, volcanic
due to earthquakes, volcanic
eruptions, and submarine slumping.
eruptions, and submarine slumping.
–
open ocean
open ocean

:
:
short
short
heights,
heights,
long
long


wavelengths (>100 km), and long periods
wavelengths (>100 km), and long periods


400-500 mph!!!
400-500 mph!!!
–
shallow water
shallow water
: their length shortens and
: their length shortens and
their height increases dramatically.
their height increases dramatically.
Global Wave Propagation After
Global Wave Propagation After
2004 Sumatra Event
2004 Sumatra Event
Titov, V., A.B. Rabinovich, H.O. Mojfeld, R.E. Thomson, and F.I. Gonzalez, The global reach of the 26 December 2004 Sumatra tsunami, Science, 309 (5743), 2045-2048, 2005.
Oregon Coastal Atlas

Oregon Coastal Atlas
Tsunami Hazard Information
Tsunami Hazard Information


or
or
/> />Tsunami from slumping
Tsunami from slumping
Driscoll et al., Geology, 28(5):407-410
North Carolina Example
North Carolina Example
Back to Wind-Driven Scenarios:
Back to Wind-Driven Scenarios:
Storm Surges
Storm Surges

extremely high water levels due to
extremely high water levels due to
–
Low pressure system - big storms
Low pressure system - big storms

persistent onshore winds
persistent onshore winds

rise in sea level
rise in sea level
Hurricanes!
Hurricanes!

(W. Atlantic)
(W. Atlantic)
Cyclones!
Cyclones!
(W. Pacific)
(W. Pacific)
NASA Advanced Microwave Scanning Radar
Hurricane Katrina, Saturday, Aug 27, 2005
NASA PPT Radar, Visible Infrared Scanner, Tropical Microwave Imager
GOES satellite
L
Accumulation of water driven shoreward by storm winds:
Elevated sea level at shore
Hurricane Katrina, Sunday, Aug 28, 2005
ESRI.com
New Orleans, Wednesday, Aug 31, 2005
OSU Wave Tank
OSU Wave Tank