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A high resolution record of sea surface temperature in southern Okinawa Trough for the past 15,000years

Author:
Ruan, Jiaping, Xu, Yunping, Ding, Su, Wang, Yinghui, Zhang, Xinyu
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2015 v.426 pp. 209-215
ISSN:
0031-0182
Subject:
climate, drilling, solar radiation, summer, surface water temperature, Ryukyu Archipelago
Abstract:
The study of long-chain alkenones in the Ocean Drilling Program (ODP) core 1202B reveals a sub-centennial resolution record of sea surface temperature (SST) in the southern Okinawa Trough for the past 15thousandyears (kyr). From the Deglaciation to Holocene, SST varied from 21.1 to 26.5°C. The presence of Bølling (15.0–14.2kyrBP) and Allerød (13.7–13.4kyrBP) warming phases, Older Dryas (14.2–13.7kyrBP) and Younger Dryas (12.8–11.6kyrBP) cold periods reflects a tight teleconnection of climate between the Okinawa Trough and the North Atlantic region in the last Deglaciation. After rapidly increased and reached the maximum at ~7.4kyrBP, SST in the southern OT gradually decreased, corresponding with the lowering of northern hemisphere summer solar insolation. However, a series of abrupt SST drops were identified at ca. 8.6–8.1, 5.8–4.8, 4.1–3.9, 3.0–2.5, 1.6–1.3 and 0.6–0.5kyrBP, which cannot be explained by solar insolation changes alone, and instead are mediated by a complex sun–ocean–atmosphere coupling.
Agid:
5449767