East Asian monsoon history and paleoceanography of the Japan Sea over the last 460,000 years

Type Article
Date 2018-07
Language English
Author(s) Gallagher Stephen J1, Sagawa Takuya2, Henderson Andrew C. G.3, Saavedra-Pellitero Mariem4, de Vleeschouwe David5, Black Heather6, 7, Itaki Takuya8, Toucanne SamuelORCID9, Bassetti Maria-Angela10, Clemens Steve11, Anderson William6, 7, Alvarez-Zarikian Carlos12, Tada Ryuji13
Affiliation(s) 1 : Univ Melbourne, Sch Earth Sci, Melbourne, Vic, Australia.
2 : Kanazawa Univ, Inst Sci & Engn, Kanazawa, Ishikawa, Japan.
3 : Newcastle Univ, Sch Geog Polit & Sociol, Newcastle Upon Tyne, Tyne & Wear, England.
4 : Univ Bremen, Dept Geosci, Bremen, Germany.
5 : Univ Bremen, MARUM Ctr Marine Environm Res, Bremen, Germany.
6 : Florida Int Univ, Earth & Environm Dept, Miami, FL 33199 USA.
7 : Florida Int Univ, Marine Sci, Miami, FL 33199 USA.
8 : Natl Inst Adv Ind Sci & Technol, Geol Survey Japan, Tsukuba, Ibaraki, Japan.
9 : Inst Francais Rech Exploitat Mer, Ctr Bretagne, Issy Les Moulineaux, France.
10 : Univ Perpignan, Lab CEFREM, Perpignan, France.
11 : Brown Univ, Earth Environm & Planetary Sci, Providence, RI 02912 USA.
12 : Texas A&M Univ, Int Ocean Discovery Program, College Stn, TX USA.
13 : Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan.
Source Paleoceanography And Paleoclimatology (2572-4517) (Amer Geophysical Union), 2018-07 , Vol. 33 , N. 7 , P. 683-702
DOI 10.1029/2018PA003331
WOS© Times Cited 17
Keyword(s) Tsushima Warm Current, Pleistocene, Holocene, paleoceanography, East Asian summer monsoon, East Asian winter monsoon
Abstract

The Japan Sea is directly influenced by the Asian monsoon, a system that transports moisture and heat across southeast Asia during the boreal summer, and is a major driver of the Earth's ocean‐atmospheric circulation. Foraminiferal and facies analyses of a 460 kyr record from IODP Expedition 346 Site U1427 in the Japan Sea reveal a record of nutrient flux and oxygenation that varied due to sea level and East Asian monsoon intensity. The East Asian summer monsoon (EASM) was most intense during MIS (Marine Isotope Stage) 5e, 7e, 9e and 11c when the Tsushima Warm Current flowed into an unrestricted well mixed normal salinity Japan Sea. Whereas East Asian winter monsoon (EAWM) conditions dominated MIS 2, 4, 6 and 8 when sea level minima restricted the Japan Sea resulting in low salinity and oxygen conditions in the absence of Tsushima flow. Reduced oxygen stratified, low salinity, higher productivity oceanic conditions characterise terminations TV, TIII, TII and TI when East China Sea Coastal Waters breached the Tsushima Strait. Chinese loess, cave and Lake Biwa (Japan) and U1427 proxy records suggests EASM intensification during low to high insolation transitions whereas the strongest EAWM prevailed during lowest insolation periods or high to low insolation transitions. Icesheet/CO2 forcing lead to the strongest EAWM events in glacials and enhanced EASM in interglacials. Mismatches between proxy patterns suggests latitudinal and land/sea thermal contrasts played a role in East Asian monsoon variability suggesting a complex interplay between ice sheet dynamics, insolation and thermal gradients controls monsoonal intensity.

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Gallagher Stephen J, Sagawa Takuya, Henderson Andrew C. G., Saavedra-Pellitero Mariem, de Vleeschouwe David, Black Heather, Itaki Takuya, Toucanne Samuel, Bassetti Maria-Angela, Clemens Steve, Anderson William, Alvarez-Zarikian Carlos, Tada Ryuji (2018). East Asian monsoon history and paleoceanography of the Japan Sea over the last 460,000 years. Paleoceanography And Paleoclimatology, 33(7), 683-702. Publisher's official version : https://doi.org/10.1029/2018PA003331 , Open Access version : https://archimer.ifremer.fr/doc/00444/55591/