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1 Modeling Skin-Layer Salinity with an Extended Salinity Layer -- Determining the Global Mean SSS Y. Tony Song Tong Lee Jae-Hong Moon Tangdong Qu Simon.

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Presentation on theme: "1 Modeling Skin-Layer Salinity with an Extended Salinity Layer -- Determining the Global Mean SSS Y. Tony Song Tong Lee Jae-Hong Moon Tangdong Qu Simon."— Presentation transcript:

1 1 Modeling Skin-Layer Salinity with an Extended Salinity Layer -- Determining the Global Mean SSS Y. Tony Song Tong Lee Jae-Hong Moon Tangdong Qu Simon Yueh Tony Song, Nov. 2014

2 2 Problems: 1. Aquarius does not give the gSSS 2. HYCOM has possible bias 3. Argo at 5 m is not Aquarius SSS Main Issue: Near-surface salinity stratification Related references: Alory et al. 2012; Boutin et al. 2013; Drucker & Riser 2014; Moon & Song 2014 Tony Song, Nov. 2014

3 3 Extended Surface Salinity Layer (ESSL) Tony Song, Nov. 2014 ESS = S1 + ΔS ✕ CF ✕ c0 ES1 = S1 – ΔS ✕ CF ✕ c1 ES2 = S2 – ΔS ✕ CF ✕ c2 CF = Correlation Function: between S1 and E-P c0, c1, and c2: empirically and mathematically determined constants E-P: NCEP and/or OAFlux (Yu et al. 2008) River: Dai et al. 2009

4 4 Correlation Function (CF) Tony Song, Nov. 2014 ESS (t) = S1 (t) + ΔS (t) ✕ CF (x,y) ✕ c0

5 5 Global SSS Tony Song, Nov. 2014 Before After

6 6 Tropical SSS Tony Song, Nov. 2014 After Before Summary: The ESSL scheme allows extrapolating sub-surface ARGO salinity to the skin-layer for a “global mean salinity” reference. Aqu-Argo error = 0.03 PSU

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