Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, China.
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China.
Sci Rep. 2018 Apr 9;8(1):5678. doi: 10.1038/s41598-018-24055-1.
The hydrological characteristics, including temperatures and salinities, of the upper water over the last 30 ka from two sites connected by the Indonesian Throughflow (ITF) across the Makassar Strait are reconstructed and compared. The thermocline hydrological gradient in the strait was larger during 13.419 ka BP and 24.227 ka BP than that in the Holocene. The weakened ITF during those periods in the last glacial period, corresponding to the decreased trade wind stress under an El Niño-like climate mean state, likely accounts for the increased thermocline gradient. The thermocline water temperature variabilities of the two sites, in particular the highest peaks at ~7 ka BP, are different from the records of the open western Pacific. Reoccurrence of the South China Sea Throughflow and thus a decreased surface throughflow along the Makassar Strait perhaps led to a warmer peak of thermocline temperature at ~7 ka BP than at ~11 ka BP.
对通过马六甲海峡连接的两个站点的上层水的水文特征（包括温度和盐度）进行了重建，并进行了比较。海峡温跃层的水文梯度在 13.419ka BP 和 24.227ka BP 期间大于全新世。在末次冰期的这些时期，ITF 减弱，与厄尔尼诺样气候平均状态下的信风应力减小相对应，这可能导致温跃层梯度增加。两个站点的温跃层水温变化，特别是在 ~7ka BP 左右的最高峰值，与开阔的西太平洋记录不同。南海海流的再次出现，以及马六甲海峡沿海水面流量的减少，可能导致在 ~7ka BP 时温跃层温度的峰值比在 ~11ka BP 时更高。
