Publication Date:
2023-05-12
Description:
Detailed deglacial and Holocene records of planktonic d18O and Mg/Ca-based sea surface temperature (SST) from the Okinawa Trough suggest that at ~18 to 17 thousand years before present (kyr B.P.), late spring/early summer SSTs were approximately 3°C cooler than today, while surface waters were up to 1 practical salinity unit saltier. These conditions are consistent with a weaker influence of the summer East Asian Monsoon (EAM) than today. The timing of suborbital SST oscillations suggests a close link with abrupt changes in the EAM and North Atlantic climate. A tropical influence, however, may have resulted in subtle decoupling between the North Atlantic and the Okinawa Trough/EAM during the deglaciation. Okinawa Trough surface water trends in the Holocene are consistent with model simulations of an inland shift of intense EAM precipitation during the middle Holocene. Millennial-scale alternations between relatively warm, salty conditions and relatively cold, fresh conditions suggest varying influence of the Kuroshio during the Holocene.
Keywords:
A-7; Age, 14C AMS; Age, 14C milieu/reservoir corrected (-400 yr); Age, 14C milieu/reservoir corrected (-700 yr); Age, dated; Age, dated standard deviation; Age, maximum/old; Age, minimum/young; Calendar age; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Laboratory code/label; PC; Piston corer
Type:
Dataset
Format:
text/tab-separated-values, 165 data points
