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SUMMARY:Sources\, pathways and drivers of Sub-Antarctic Mode Water formati
 on - Bieito Fernandez Castro\, University of Southampton 
DTSTART:20251110T130000Z
DTEND:20251110T140000Z
UID:TALK236770@talks.cam.ac.uk
CONTACT:Bethan Wynne-Cattanach
DESCRIPTION:The formation of Sub-Antarctic Mode Waters (SAMWs) in the sub-
 Antarctic Zone of the southern Indo-Pacific Ocean is crucial for the trans
 fer of large amounts of heat and carbon dioxide to the ocean interior\, th
 ereby mitigating climate change. Despite their importance\, there are cont
 rasting views regarding the origins and history of these water masses prio
 r to subduction\, which determine the waters' heat and carbon sequestratio
 n capacity. Using a state-of-the-art ocean model constrained by observatio
 ns\, we identify and track the sources of SAMWs and quantify their heat ex
 change with the atmosphere. Our results confirm the co-existence of two so
 urces of SAMWs: warm\, shallow subtropical waters and cold\, deep Antarcti
 c waters. The formation of SAMW from contrasting sources has distinct impa
 cts on the climate system. On their path to SAMW formation\, subtropical w
 aters release heat into the atmosphere\, whilst Antarctic waters absorb he
 at. Furthermore\, subtropical and Antarctic sources dominate SAMW formatio
 n in the Indian and Pacific Oceans\, respectively\, highlighting the contr
 asting nature of the two main pools of SAMW. Our results shed new light on
  the intricate nature of SAMWs\, helping to predict and understand their r
 ole in slowing down future climate change.
LOCATION:MR3\, CMS
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