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Item 7 Indices

• Sea Surface Temperature indices
• Bermuda-Labrador Sea Transport Index
• A. Fischer, CLIVAR/GODAE Ocean Synthesis Meeting
• 31 Aug - 1 Sep 2006, ECMWF, Reading, UK

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SST in boxes
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Perspective

• Biases in the seasonal cycle of some of the
  models (non-SST constrained)
  
• In the tropical Pacific interannual variability
  is stronger than these biases
  
• in WTIO the interannual variability on top of the
  syntheses own climatologies are very similar
  
• Interannual variability of SST in the tropical
  Indian Ocean (particularly SETIO) not captured by
  2 of the syntheses
  
• are subsurface expressions of tropical
  interannual variability (currents, thermocline
  depth/heat content) in the Indian Ocean captured
  as well as SST in the SST-constrained syntheses?

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Bermuda-Labrador Basin Transport Index
Curry and McCartney, JPO 2001
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Perspective

• Offsets in PEA
• tend to be the same between Labrador Sea and
  Bermuda - canceling out in the transport index
  (vertical integration details?)
  
• Some success in capturing the phasing of changes
• Amplitude variations