Fig. 5: Subsurface ocean variability during low Antarctic sea ice events for SPEAR_LO control simulation.
From: Antarctic sea ice multidecadal variability triggered by Southern Annular Mode and deep convection
a Lead/lag composite anomalies of potential ocean temperature (in 10−1 °C) in the upper 700 m during the low Antarctic sea ice events for the SPEAR_LO CTL simulation. Positive (negative) lead/lag years mean that Antarctic SIE leads (lags) the other variables. Colors indicate significant anomalies exceeding 95% confidence level using a Student’s t test. Black line corresponds to the mixed-layer depth at which the potential density increases by 0.03 kg m−3 from the ocean surface. b Same as in (a), but for salinity (in 10−1 PSU). c Same as in (a), but for potential density (Rho0 in 10−1 kg m−3). d Same as in (a), but for ocean stratification (in 10−4 kg m−4) estimated by minus vertical gradient of potential density (-dRho0/dz). Positive (negative) values indicate stronger (weaker) stratification. e Same as in (d), but for contribution from the potential temperature anomaly to the ocean stratification anomaly (-dRho0_T/dz in 10−4 kg m−4). f Same as in (d), but for contribution from the salinity anomaly to the ocean stratification anomaly (-dRho0_S/dz in 10−4 kg m−4).
