Load SAM, ENSO indexes. Apply statistical methods to assess the relationship between the mooring data and these potential upwelling variability drivers.

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This can involve time-series analysis, correlation analysis, regression modelling, or other statistical techniques.

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The climate modes that affect the area are IOD, SAM, ENSO. Here are some links to the BoM website where you can see the impact of the various phases in SA.

• IOD http://www.bom.gov.au/climate/iod/#tabs=Indian-Ocean-climate-drivers
• SAM http://www.bom.gov.au/climate/sam/. Leuwin current has a strong relationship to SOI.
• ENSO http://www.bom.gov.au/climate/about/australian-climate-influences.shtml?bookmark=enso

What I know about these indexes on the year (2013) I identified the suppression through a quick look at BoM:

• SOI (SAM index): mostly neutral or else positive. http://www.bom.gov.au/climate/enso/soi/
• IOD neutral or negative during the entirety of the time series. http://www.bom.gov.au/climate/influences/graphs/#iod-monthly
• ENSO neutral http://www.bom.gov.au/climate/influences/graphs/#nino34-monthly