North Pacific oceanic variability

1. Seminar report North Pacific oceanic variability 報告人：沈茂霖 (Mao-Lin Shen) 2014/9/4

2. Qiu’s papers • Qiu, B. and S. Chen (2010) "Interannual-to-Decadal Variability in the Bifurcationof the North Equatorial Current of the Philippines." JPO, accepted. • Qiu, B. and S. Chen (2010) "Interannual Variability of the North Pacific Subtropical Countercurrent and Its Associated Mesoscale Eddy Field." JPO, 40(1), 213-225. • Qiu, B. and S. Chen (2010). "Eddy-mean flow interaction in the decadally modulating Kuroshio Extension system." DSR-II, 57(13-14): 1098-1110.

3. (Qiu and Chen, 2010) • North Equatorial Current bifurcation (NECB) • Zonally distributed wind stress curl

4. STCC (Qiu and Chen, 2010) • STCC, subtropical countercurrent • Ekman convergence forcing, which associated with meridional temperature gradient and zonal geostrophic velocity

5. Fig. Comparison between the interannually-varying Ekman forcing term and the interannually-varying EKE time series in the STCC band.

6. Fig. Comparison with Nino 3.4 and WP indices.

7. (Qiu and Chen, 2010) Fig. (B) Eddy kinetic energy calculated from the satellite altimeter SSH data from October 1992 to September 2008. White contours denote the 4000-m isobaths..

9. Fig. (A) Lagged correlation between the SSHa (32o-34oN) and the one-year running mean PDO index. (B) Same as (A) except for the negative, one-year running mean NPGO index. Shaded regions indicate negative correlation coefficients.

12. Fig. Correlation map of modeled Kuroshio transport and modeled SSHa (left) and that of observed Kuroshio transport (Johns et al., 2001) and SSHa.

13. Modeled Kuroshio transport Fig. Determining modeled Kuroshio transport from SSHa.

14. Kuroshio transport Fig. Determining Kuroshio transport from AVISO SSHa.

15. Luzon Strait Throughflow Fig. Modeled Luzon Strait throughflow and the correlation map with SSHa.

16. Thank you for your attention.