Decadal and Long?Term Variability of Sea Level in the Southwestern Pacific During 1948–2018

Decadal and long-term variability of sea level in the Southwestern Pacific (SWP) was investigated by using tide gauge measurements obtained near New Zealand during 1948–2018 a 1.5-layer reduced gravity model. After removal global mean level, there still exists prominent positive trend strong decadal oscillations SWP which are attributed to Southern Annular Mode (SAM) Interdecadal Oscillation (IPO), respectively. On time scale, intensification local wind stress curl associated with strengthening SAM contributes rise (SLR) through Ekman convergence. locally generated westward propagating signals induced IPO exert comparable influences on variations SWP. Results from multivariable linear regression suggest that can account for almost all SLR, explains approximately 58% variability.