Open AccessVariations of East Asian summer monsoon since the last deglaciation based on Mg/Ca and oxygen isotope of planktic foraminifera in the northern East China Sea
Author(s) -
Kubota Yoshimi,
Kimoto Katsunori,
Tada Ryuji,
Oda Hirokuni,
Yokoyama Yusuke,
Matsuzaki Hiroyuki
Publication year - 2010
Publication title -
paleoceanography
Language(s) - English
Resource type - Journals
eISSN - 1944-9186
pISSN - 0883-8305
DOI - 10.1029/2009pa001891
Subject(s) - geology , stalagmite , foraminifera , δ18o , holocene , oceanography , deglaciation , isotopes of oxygen , east asian monsoon , sea surface temperature , teleconnection , surface water , climatology , precipitation , bottom water , monsoon , benthic zone , stable isotope ratio , environmental science , geochemistry , physics , el niño southern oscillation , quantum mechanics , environmental engineering , meteorology
Variations in Mg/Ca‐based sea surface temperature and oxygen isotope ratio ( δ 18 O) of the surface water in the northern East China Sea (ECS) were reconstructed with high resolution during the last 18 kyr using planktic foraminifera. Millennial‐scale variations between warmer, more saline surface water and cooler, less saline surface water were recognized during the early deglacial period and the Holocene, suggesting changes in the mixing ratio between the Kuroshio Water and the Changjiang Diluted Water. Stronger East Asian summer monsoon (EASM) precipitation events in south China are identified at 10.5, 8.8, 7.0, 5.3, 4.7, 2.9, 1.7, and 0.5 ka, based on sea surface salinity (SSS) records of the northern ECS. Weaker EASM precipitation events are also detected at 9.3, 8.3, 7.3, 6.0, 3.3, 2.3, 0.7, and 0.4 ka during the Holocene. These events agree with the maxima in δ 18 O records of stalagmites from various parts of the Changjiang (Yangtze) River drainage. This agreement supports that our SSS record properly captures the millennial‐scale dry (less EASM precipitation) events over the drainage basin of the Changjiang River during the Holocene. These dry events are also in good agreement with North Atlantic ice‐rafted events, suggesting a teleconnection between North Atlantic climate and the EASM during the Holocene.