Southern California Oceanography MLPA South Coast Study...

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Southern California Oceanography Southern California Oceanography MLPA South Coast Study RegionMLPA South Coast Study Region

Oceanography Workshop September 16, 2008 • El Segundo, CA

John Largier • Bodega Marine Lab

Developing an Oceanographic Developing an Oceanographic Perspective for MLPA in S CaliforniaPerspective for MLPA in S California

What can we do with models & cartoons?What can we do with models & cartoons?

Developing an Oceanographic Developing an Oceanographic Perspective for MLPA in S CaliforniaPerspective for MLPA in S California

I

II

III

VIV

VI

-- Currents & Connectivity

-- Water type & Habitat

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

ConnectivityConnectivity

- typical circulation pattern- variability …

… predictable currents? … stochastic dispersion?

- features

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

HabitatHabitat- biogenic water properties

(SST, Chl)- water quality,

i.e., contaminants

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

HabitatHabitat- biogenic water properties

(SST, Chl)- water quality,

i.e., contaminants

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

LargeLarge--scale circulationscale circulation

What ?

wind stress curl (Dong & McW 2007)

schematic (Hickey 1992, 2003)

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

LargeLarge--scale circulationscale circulation

Seasonal evolution …… spring: winds & upwelling

… summer: winds relax inshore,curl & Ekman pumping, SC Counter-current Southern California Eddy

… fall: broadening recirculation becomes unstable

seasonal dynamics (Di Lorenzo 2003)

Merged MODIS Aqua and Terra products. (Aug 13 - 17, 2006). Courtesy of M. Kahru and B.G. Mitchell, OPG Group, SIO

SBC, SMB, islands,upwelling, …

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

Multiple scales of patterns Multiple scales of patterns ……

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

Shelf currentsShelf currents

Southward currents over the shelf …reversing at times (Oct-Nov?)

Huntington Beach (Noble et al 2004)

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

UpwellingUpwellingShallow thermoclinethroughout SCB, breaks surface at specific times & places

Pt Conception, Pt Dume, Palos Verdes, Pt Loma, S of border

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

UpwellingUpwelling

Thermistors N and S of Pt Loma

Zimmerman

Cross-shore transects, shelf break to the inner shelf :

distance from 20m isobath (m)

dept

h (m

)

Temperature (oC)

Nitrate conc. (μM)

Chlorophyll conc. (μg/l)

( oC)

(μM)

(μg/l)Upwelling Upwelling …… Shallow thermocline with Chl max

Drew Lucas data (unpubl.)

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

Internal WavesInternal Waves … and other HF motions

Temperature, fluorescence, (08/03 - 08/23/2006; 25 m WW):

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

Internal WavesInternal Waves … and other HF motions

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

WavesWaves

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

River and tidal plumesRiver and tidal plumes

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

River and tidal plumesRiver and tidal plumes

Developing an Oceanographic Developing an Oceanographic Perspective for MLPA in S CaliforniaPerspective for MLPA in S California

I

II

III

VIV

VI

-- Currents & Connectivity

-- Water type & Habitat

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

ConnectivityConnectivity

- typical circulation pattern- variability …

… predictable currents? … stochastic dispersion?

- features

Southern California Oceanography MLPA SCSRSouthern California Oceanography MLPA SCSR

HabitatHabitat- biogenic water properties

(SST, Chl)- water quality,

i.e., contaminants

Developing an Oceanographic Developing an Oceanographic Perspective for MLPA in S CaliforniaPerspective for MLPA in S California

What can we do with models & cartoons?What can we do with models & cartoons?

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