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Meeting Dates Location

Title Author. Meeting Dates Location. NASA Aquarius Mission Timeline. Initial SPURS-2 Cruise Window. SPURS-2 Workshop. EOPM OSST Seattle. May. 2-year mean of Aquarius SSS. 2-year mean of Aquarius SSS. Animation of monthly maps. Monthly maps – 2 year average.

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Meeting Dates Location

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  1. Title Author Meeting Dates Location

  2. NASA Aquarius Mission Timeline Initial SPURS-2 Cruise Window SPURS-2 Workshop EOPM OSST Seattle May

  3. 2-year mean of Aquarius SSS

  4. 2-year mean of Aquarius SSS

  5. Animation of monthly maps

  6. Monthly maps – 2 year average

  7. Monthly maps with rain – first year

  8. Monthly maps with rain – second year

  9. Salinity/rain anomalies – first year

  10. Salinity/rain anomalies – second year

  11. 12 month EOF from 2-year averaged Aquarius SSS

  12. 24 month EOF of Aquarius SSS Consider shifting site westward to ~130°W to catch the EOF1 center of action and EOF2 saddle point

  13. Mean March (dry season) Current

  14. Mean October (wet season) Current

  15. Aquarius Captures Pacific TIWs • TIWs affect ocean, climate, biogeochemistry • Aquarius reveals TIWs salinity structure for the 1st time from space). • Brings new understanding to TIWs. Lee, Lagerloef, Gierach, Yueh, Dohan (2012, June GRL) SSS from Aquarius (color shading), SST (contours in a), surface currents (arrows in b) on Dec. 11, 2011 (7-day maps) Reynolds ¼-deg OI PSU OSCAR

  16. Fronts October 2012 monthly averages Above: Aquarius SSS gradients reveal prolific frontal structures that are not evident in Argo OI maps. Dark contour is 34.6 isohaline.Below: Differences between the maps above show (left) that satellite SSS are biased low relative to Argo in high rain regions, and (right) frontal patterns unresolved by Argo. The black contours are 100 mm/month isolines. H.Kao &G.Lagerloef, JGR-Oceans in prep, 2013

  17. Salinity gradient maps psu/km – 2 year average

  18. Salinity gradient maps psu/km – first year

  19. Salinity gradient maps psu/km – second year

  20. Summary • Proposed SPURS-2 site is in zonal band of strongest seasonal SSS variability • EOFs show peak SSS amplitude at ~130W; ~ 0.5 psu amplitude. Coincides with null point in quadrature phase EOF2 • Seasonal cycle is lightly asymmetrical over the year; max SSS in March, min SSS in October • Interannual variations; SSS under the ITCZ in Year 2 (Sep12-Aug13) was significantly less than in Year 1 (Sep11-Aug12). • Proposed site is in the climatological shear zone between NECC and NEC • Fronts varied seasonally and interannually; strongest during the wet season.

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