[MIS08-P15] Variations of the North and South Pacific Subtropical Gyres over the past 400 kyrs
Keywords:Sea surface temperature, South Pacific Subtropical Gyre, Paleoceanography
In this study, we reconstructed and analyze mid sea surface temperature (SST) records in the western and eastern sides in the NPSG and South Pacific Subtropical Gyre (SPSG) for the past 400 kyrs to investigate evolution of those gyres. We reconstructed intensity of the gyre circulation from ΔSST difference between west and eastern sides of the gyres. The west-east ΔSST record in SPSG show orbital scale variations over the past 400 kyrs. Spectral analysis suggests predominance of 23 and 41 kyr cycles, suggesting precession and obliquity control on SPSG.