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New Zealand Fjord Records of Southern Hemisphere Westerly Wind Variability and Carbon Cycling - Dr Chris Moy

The strength, latitudinal position and zonal symmetry of the Southern Hemisphere westerly winds (SWW) play an important role in Southern Ocean (SO) C cycling by driving meridional overturning circulation and subsequent air-sea gas exchange. The efficiency of the SO carbon sink is highly dependent on the symmetry and strength of the SWW, but evaluating the role the SWW play over centennial to millennial timescales requires a distributed network of senstive paleoclimate records spanning a range of latitudes from all SO sectors, which we presently lack. Fjords along the SW margin of NZ offer excellent opportunities to reconstruct past changes in the SWW and contribute to our understanding of past westerly symmetry. I will present ongoing work towards evaluating past variations in the SWW from fjord geochemical sediment records obtained from Fiordland and report on progress towards establishing an international drilling project in order to obtain complete Holocene and late Pleistocene sedimentary records.

Date Wednesday, 25 September 2019
Time 1:00pm - 2:00pm
Audience All University
Event Category Sciences
Event Type Departmental Seminar
LocationBenson Common Room (Gn9), Geology Building

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