Introduction to Physical Oceanography
Homework Set 6
Due 15 October 2008
Late homework will cost 15 points per week or
part of a week it is late.
- Upwelling: This image of sea-surface temperature
in the Indian Ocean on 1 October 2005 shows
cold water offshore of Somalia indicating strong upwelling along
the coast of Somalia. Upwelling of cold water is common in this
region in late summer through October. Yet, this is off the east
coast of Africa, and upwelling typically occurs on west coasts
- Why is upwelling common offshore of Somalia
at this time?
- Ekman Transports: What is the direction of
the Ekman transport at any point relative to the eye of the hurricane?
To answer the question:
- Sketch the circulation in the atmosphere near
the eye of a hurricane.
- On the sketch, draw arrows showing Ekman transport
in the ocean at several points around the eye of the hurricane.
- What vertical currents might result from
this pattern of Ekman currents?
- Geostrophic Currents: Why can't direct measurements
of pressure made at different locations in the ocean be used to
calculate pressure gradients and therefore the baroclinic (relative)
- Geostrophic Currents: Briefly describe baroclinic
and barotropic components of geostrophic flow.
- Which component is calculated by the geostrophic
method applied to hydrographic observations made from ships?
- Sverdrup Circulation: The
Gulf Stream and Kuroshio both leave the coast near 40° N
latitude. Why? Hint: It has to do with Sverdrup
and the idea that the streamlines
of the Sverdrup circulation are closed at a western boundary
by a western boundary current.
27 August, 2008