THE INDONESIAN THROUGHFLOW RESPONSE TO INDO-PACIFIC CLIMATE VARIABILITY

摘要

The Indonesian Throughflow (ITF) is a significantrncomponent of the global thermohaline circulation, andrnplays an important role in the heat and freshwaterrnbudget of both the Pacific and the Indian Oceans. ITFrntransport variability is linked to the large-scale climaternmodes of the El Ni?o-Southern Oscillation (ENSO) andrnthe Indian Ocean Dipole (IOD). Here, we develop proxyrntechniques using the remotely-sensed altimeter data tornproduce a time series for monitoring interannual ITFrntransport variability. The focus is on the three outflowrnpassages of Lombok, Ombai and Timor, where directrnvelocity measurements are available to help mold andrnground truth the algorithm needed to convert the proxyrndata to ITF transport information. The resulting timernseries shows strong interannual ITF variability that isrnrelated to Indo-Pacific climate variations driven by therndistinctive processes associated with both ENSO andrnthe IOD.