Coastal Upwelling Equatorward winds along a coastline lead to offshore Ekman transport Mass conservation requires these waters replaced by cold, denser.

Slides:

Advertisements

Similar presentations

Chapter 15 Section - 1.

Advertisements

Coastal Upwelling Features over Arabian Sea From ROMS-Model

Upwelling/Downwelling and Related Processes The 2 nd Last Class.

California Current & Barnacle larvae transport Mikaela Provost Physical Oceanography 12/2/2010.

Coastal Upwelling Equatorward winds along a coastline lead to offshore Ekman transport Mass conservation requires these waters replaced by cold, denser.

Currents Surface Currents –About 10% of the ocean’s water is in surface currents, water flowing horizontally in the uppermost 400 m Driven mostly by wind.

Ocean Gyres - combine knowledge of global winds and Ekman flow - surface transport can be determined from wind direction/velocity - surface transport alters.

Earth Systems Science Chapter 5 OCEAN CIRCULATION I: SURFACE Winds, surface currents Flow within gyres: convergence, divergence, upwelling, downwelling,

Oceanic Circulation Current = a moving mass of water.

The California Current and Coastal Upwelling Allison Parker Physical Oceanography November 20, 2007.

Physical Controls on Phytoplankton Would you expect a fall bloom of phytoplankton? What would end it?

Wind-driven Ocean Circulation

Oceanic Circulation Current = a moving mass of water.

Ocean Circulation II Ekman transport & Geostrophic currents.

Highways in the Sea (Chapter 9)

Lecture 7: The Oceans (1) EarthsClimate_Web_Chapter.pdfEarthsClimate_Web_Chapter.pdf, p

Define Current decreases exponentially with depth. At the same time, its direction changes clockwise with depth (The Ekman spiral). we have,. and At the.

Surface wind stress Approaching sea surface, the geostrophic balance is broken, even for large scales. The major reason is the influences of the winds.

Effects of Ocean-Atmosphere Coupling in a Modeling Study of Coastal Upwelling in the Area of Orographically-Intensified Flow Natalie Perlin, Eric Skyllingstad,

Upwelling. What is upwelling? Upwelling video clip.

Define Current decreases exponentially with depth and. At the same time, its direction changes clockwise with depth (The Ekman spiral). we have,. and At.

General Ocean Circulation. Wind driven circulation About 10% of the water is moved by surface currents Surface currents are primarily driven by the wind.

Quiz #1, Part 1 results (You can see the statistics yourself in “My Grades”)

OCEAN CURRENTS AND CLIMATE. Ocean Currents and Climate There are two types of Ocean Currents: 1. Surface Currents are driven by surface wind circulation.

On the ocean surface, wind is what drives the direction of the water. The Coriolis Force helps to turn the water to the east (right) in the N.H. and east.

OCEAN CURRENTS.

Surface Ocean Circulation and Geostrophy Fig. CO7 S.

Upper ocean currents, Coriolis force, and Ekman Transport Gaspard-Gustave de Coriolis Walfrid Ekman.

Ocean Circulation Recall from last lecture that differential heating of the earth, along with the effects of the rotation of the globe cause generally.

IoE The Basics of Satellite Oceanography. 8. Mesoscale variability and coastal pollution Lecture 8 Mesoscale variability and coastal pollution.

The Ocean General Circulation. Mean Circulation in the Ocean Gulf Stream.

The Ocean General Circulation (satellite). Mean Circulation in the Ocean Gulf Stream.

Current Weather Introduction to Air-Sea interactions Ekman Transport Sub-tropical and sub-polar gyres Upwelling and downwelling Return Exam I For Next.

Ekman pumping Integrating the continuity equation through the layer:. Assume and let, we have is transport into or out of the bottom of the Ekman layer.

For most of the basin Question

HOLLY GONZALES DECEMBER 4, 2013 Humboldt Current System.

Coastal Upwelling Equatorward winds along a coastline lead to offshore Ekman transport Mass conservation requires these waters replaced by cold, denser.

The California Current

Coastal Oceanography Outline Global coastal ocean Dynamics Western boundary current systems Eastern boundary current systems Polar ocean boundaries Semi-enclosed.

EVAT 554 OCEAN-ATMOSPHERE DYNAMICS UPWELING AND DOWNWELLING; EKMAN TRANSPORT LECTURE 14 (Reference: Peixoto & Oort, Chapter 8,10)

Ocean Currents. The water in the ocean is constantly moving The water in the ocean is constantly moving Broad bands of ocean water that flow in one direction.

Zack Burgher Physical Oceanography. Development of the Current The eastern boundary current of the South Atlantic subtropical gyre Exceptionally strong.

99 Surface and Deep Circulation. Chamberlin and Dickey, 2008 Exploring the World Ocean Questions to Consider What are the patterns of the surface circulation?

Boundary Currents - combine knowledge of global winds and Ekman flow - surface transport can be determined from wind direction/velocity - surface transport.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

How to create a subtropical gyre circulation I

Gyres of the world oceans

Global wind circulation

NASA’s Ocean Color Online Visualization and Analysis System

NASA’s Ocean Color Online Visualization and Analysis System

Class 24/25 -- The Oceans SURFACE CURRENTS Major surface currents

Ocean Circulation Vol 1: Surface Currents.

EarthsClimate_Web_Chapter.pdf, p

Coastal CO2 fluxes from satellite ocean color, SST and winds

Ocean Currents Ocean water circulates in currents caused by wind and by density differences Currents are the flow of water between areas of different surface.

Western Boundary Currents

Week 6-7: Wind-driven ocean circulation Tally’s book, chapter 7

The Dynamic Ocean.

Ocean Currents Chapter 16.1

Ocean Currents Some key questions: What causes the ocean currents?

Vertical Structure of the California Current System Hoke Seamount Cruise 2004 OC SEP 2006 LT Alicia Hopkins.

LT Ricardo Roman OC3570 March 7, 2006

The California Current System: Comparison of Geostrophic Currents, ADCP Currents and Satellite Altimetry LCDR David Neander, NOAA OC3570, Summer 2001.

Ocean Currents Some key questions: What causes the ocean currents?

Upwelling Currents.

An Analysis of the Eckman Mass Transport for Cruise Data OC

Ocean Currents.

Presentation transcript:

Coastal Upwelling Equatorward winds along a coastline lead to offshore Ekman transport Mass conservation requires these waters replaced by cold, denser waters Brings nutrients into surface waters creating blooms Creates dynamic height gradients - currents

Coastal Upwelling

April 2000 CalCoFI Cruise

Coastal Upwelling California Current April 1978 AVHRR - SST CZCS Chlorophyll SSTChl

At smaller scales... Strong west winds

Review Wind stress along coasts leads to divergence of surface Ekman transport This drives to coastal upwelling and forms a coastal jet This drives the productivity of eastern boundary currents