oceanographic patterns in ecco & satellite imagery with applications to fisheries li luo and...
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Oceanographic Patterns in ECCO & Satellite Imagery with Applications to Fisheries
Li Luo and Dale Kiefer
11/01/2012
SECTION TITLE | 2
Our work with ECCO• We have imported output of ECCO simulation of global circulation into the
EASy Marine Geographical Information System that we have developed. We can now more easily merge such output with satellite imagery, models of plankton, and fishery dynamics. As one example ECCO has been incorporated into USC’s web-based information system dealing with climate change and the Southern California Bight.
• We have conducted EOF analyses to determine the goodness of fit between ECCO simulations and satellite imagery of SST, SSChl, and SSH. We will employ ECCO to better understand the patterns that we have observed in these analyses.
• Using ECCO output, we have explored the factors shaping to the spatial/temporal distribution of catch, effort, and recruitment of fisheries:• Tuna of the Eastern Pacific• Thresher, Blue, and Mako sharks of the California Current• Menhaden of the Gulf Stream• Sardines of Canary Current off Morocco
Bight Watch Information System
GISStatistical Tools EOF, pattern assessment, correlation analyses, predictor
Biogeochemical Models Plankton, Productivity, Nutrient, CO2, O2
Fishery Models Small and Large Pelagics
satellite imagerye.g. GHRSST,
SSChl, AVISO SLA
ocean resourcese.g. CALCOFI,
SWFSC
circulation modelse.g. ECCO, S.C. ROMS
ocean monitoring e.g. Buoys, Scripps
Pier, SPOT, SCCWRP
Time Series Information
UtilityTest models Explore Linkages Track Climatic Drivers Identify Anomalies
ENSO, PDO, EMI, NPGO
Bight Watch GIS Architecture
EASy
DatabaseImagery & Model OutputGE/GM
Desktop
NetViewer
GoogleEarth
Spatial Analysis
Service
Custom Data
EASy Infrastructure
Reg. DataEOF XLS
Batch File
‘R’Data File
PNG File
Script File
‘R’ InterfaceGE/GM Files
GoogleMaps
Google PHAMLite
Outline
EOF Results Comparison between Aviso satellite data and ECCO SSH model data across three spatial scales.
Application of ECCO & Satellite imagery In Fishery.
EOF Results Comparison between Aviso satellite data and ECCO SSH model data
across three spatial scales
North Pacific Basin
West Coast of North AmericaSouthern California Bight
(Latitude [-29.5 52.5] Longitude [-217.75 -71.75])
(Latitude: [22.5 48.25]Longitude: [-130 -105.25])
(Latitude: [30.75 34.75]Longitude: [-120.75 -116])
Study Area
ECCO AVISOEOF Results Comparison between Aviso satellite data and ECCO model data
Mode 1
Mode 2
Mode 3
The First Three EOF Spatial Patterns Modes (the North Pacific Basin)
Mode1ECCO: 16.5%Aviso: 14.3%
r = 0.94
Mode 2ECCO: 6.2%Aviso: 6.8%
r=0.85
Mode3ECCO: 5.1%Aviso: 4.4%
r=0.91
The First Three Temporal expansion coefficients of EOF Spatial Patterns Modes (the North Pacific Basin)
Mode 1
Mode 2
Mode 3
ECCO AVISO
The First Three EOF Spatial Patterns Modes (the West Coast of North America)
Mode 1ECCO: 60.6%Aviso: 31.0%
r=0.80
Mode 2ECCO: 6.1%Aviso: 5.0%
r=0.74
Mode 3ECCO: 3.4%Aviso: 3.4%
r=0.36
The First Three Temporal expansion coefficients of EOF Spatial Patterns Modes (the West Coast of North America)
Mode 1
Mode 2
Mode 3
ECCO AVISO
The First Three EOF Spatial Patterns Modes (the Southern California Bight)
Mode 1ECCO: 69.6%Aviso: 47.8%
r=0.8
Mode 2ECCO: 7.8%
Aviso: 12.2%r=0.34
Mode 3ECCO: 4.5%Aviso: 6.8%
r=-0.02
The First Three Temporal expansion coefficients of EOF Spatial Patterns Modes (the Southern California Bight)
EOF Mode
North Pacific Basin
West Coast of North America
Southern California Bight
1 0.94 0.80 0.802 0.85 0.74 0.343 0.91 0.36 -0.02
Correlation Coefficients between Aviso Satellite imagery and ECCO Model Data
ModePacific West Bight
ECCO Aviso ECCO Aviso ECCO Aviso
1 16.5 14.3 60.6 31.0 69.6 47.8
2 6.2 6.8 6.1 5.0 7.8 12.2
3 5.1 4.4 3.4 3.4 4.5 6.8
Percentage of the total variance explained by each mode (%)
Application of Satellite imagery and ECCO In Fishery
MODIS. Chlorophyll. February 2007
Annual Average O2 at 150 m
ECCO currents and 1 degree skipjack caught on fish aggregation devicesAugust 1998
FAD and Shear Attraction
ECCO currents, and 1 degree yellowfin dolphin setsApril 1999
Vorticity and Shear shapes the distribution of catch and effort
Conclusions• The correlation coefficient between each pair of the EOF
mode temporal expansion coefficients for the AVISO imagery and ECCO calculations across all the three spatial scales suggested that the SSH values from ECCO model matched well with the real satellite imagery for the large scale such as the North Pacific Basin. The match appears less significant on smaller scales.
• It appears that patterns in circulation in the Eastern Pacific helps greatly to explain the distribution of catch, effort, and recruitment of tuna.
Thanks!
EOF Results Comparison between SST, SSH and SSChl satellite data
for the North Pacific Basin
Mode 1SST: 20.9%
ChlA: 10.6%SSH: 14.3%
Mode 2SST: 7.6%
ChlA: 8.3%SSH: 6.8%
Mode 3SST: 6.5%
ChlA: 6.1%SSH: 4.4%
The comparison of EOF results of SST, SSH, and Chlorophyll within north pacific basin area
SST – GHRSSTChlA – SeaWiFS SSH – AVISO
SST
ChlA
SSH
The First Two EOF Spatial Patterns ModesMode 1 Mode 2
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