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The impacts of the Indonesian Throughflow on the inter‐basin seesaw mechanism, in idealized experiments

AuthorsSantis, Wlademir; Aimola, Luis; Castellanos, Paola ; Campos, Edmo
KeywordsMeridional overturning circulation
Idealized experiments
Inter-basin seesaw effect
Indonesian Throughflow
Issue DateApr-2018
PublisherRoyal Meteorological Society (Great Britain)
CitationInternational Journal of Climatology 38(suppl.1): e985- e997 (2018)
AbstractThe role that the Indonesian Throughflow plays on climate is investigated in an alternative scenario, expected during glacial ages. The equatorwards shift of the Southern Hemisphere westerlies found in glacial ages acts to decrease the Agulhas Leakage (AL) and the thermohaline circulation (THC) in the Atlantic. Recent results suggest that these changes are followed by an increased THC in the Pacific, through an inter-basin seesaw mechanism. The enhanced circulation in the Pacific demands thermocline water to cross the equator towards northern latitudes, which shifts the water source of the throughflow from the low-salinity North Pacific to the relative saltier South Pacific. It is shown that in this equilibrium, the salinity anomalies of the throughflow impact the inter-basin seesaw towards the restoration of the modern climate, enhancing the North Atlantic Deep Water (NADW) formation and decreasing the THC in the Pacific. These results are consistent with paleo-observations and provide new insights to interpreting the climate changes in glacial periods.
Description13 pages, 10 figures, 2 tables, supporting information https://doi.org/10.1002/joc.5424
Publisher version (URL)https://doi.org/10.1002/joc.5424
Identifiersdoi: 10.1002/joc.5424
issn: 0899-8418
e-issn: 1097-0088
Appears in Collections:(ICM) Artículos
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