Geostrophic transport of Indonesian throughflow

The Indonesian throughflow was measured during a six year period, permitting estimates of the mean and mean annual cycle of volume transport. The measurements are based on regularly repeated XBT sections, which were used with the climatological T/S relationship to calculate geostrophic currents relative to 400 m. The mean relative throughflow-transport is found to be 5 × 106 m3/s. Hydrographic data is used to investigate deeper currents and the total throughflow. The mean annual cycle of throughflow-transport has strong annual and semiannual components. The maximum net, relative transport toward the west between Australia and Indonesia is 12 Sv, in August/September. The amplitude and phase of the annual signal vary considerably within the Indonesian region.