TY  - JOUR
A1  - Pei, Renjie
A1  - Kuhnt, Wolfgang
A1  - Holbourn, Ann
A1  - Jöhnck, Janika
A1  - Hingst, Johanna
A1  - Beil, Sebastian
A1  - Lübbers, Julia
A1  - Andersen, Nils
T1  - Evolution of Sea Surface Hydrology Along the Western Australian Margin Over the Past 450 kyr
Y1  - 2021-11-05
VL  - 36
IS  - 11
JF  - Paleoceanography and Paleoclimatology
DO  - 10.1029/2021PA004222
PB  - 
N2  - We collected a suite of core top samples during R/V Sonne Cruise SO257 in May 2017 along the southwestern front of the Indo‐Pacific Warm Pool (IPWP) to monitor the variability of Southern Hemisphere tropical and subtropical sea surface hydrology and to assess temperature and salinity reconstructions with data sets reflecting conditions in the post‐monsoonal season. In our core top samples, a steep increase in planktic δ18O, associated with a decrease in sea surface temperature (SST), indicates that the southwestern front of the IPWP is located between 23° and 24°S during austral fall. We additionally reconstructed SST, sea surface salinity ,and δ18O seawater (δ18Osw) over the last 450 kyr in two sediment successions located within and beyond the monsoonal rain belt. Our records show that SST was highly coherent and phase‐locked with atmospheric pCO2 during the last 450 kyr. The regional differences in the δ18Osw records reveal that the Western Australian Margin north of 15°S remained seasonally under the influence of IPWP water masses, even during glacials. The temporal variability in upper ocean hydrology along the Western Australian Margin is not directly coupled to local monsoonal precipitation, but is strongly affected by advective mixing of Indonesian Throughflow derived water masses.
N2  - Key Points: Southwest front of modern Indo‐Pacific Warm Pool (IPWP) during austral fall is located between 23° and 24°S. Western Australian Margin north of 15°S remained seasonally influenced by IPWP throughout past 450 kyr. Upper ocean hydrology off Western Australia represents an integrated signal of monsoonal precipitation and advective mixing.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9765
ER  -