Variation in the sedimentation rates at the South and Central Highs of Shatsky Rise for the last 30 kyr

Title
Variation in the sedimentation rates at the South and Central Highs of Shatsky Rise for the last 30 kyr
Author(s)
서인아; 형기성
KIOST Author(s)
Hyeong, Kiseong(형기성)
Publication Year
2018-12-10
Abstract
The Kuroshio Extension (KE) occupies the boundary region of subtropical and subarctic gyre systems of North Pacific and its position and structure are sensitive to climatic changes. To understand the late Pleistocene history of KE, a 14 m long giant piston core, HI1715-GPC1 (36°08′N, 158°13′E 3550 m water depth), was acquired at the Central High of Shatsky Rise, located on the main axis of present-day KE pathway. The average linear sedimentation rate (LSR) for the Late Holocene is 2.9 cm/kyr, higher than that reported from the NPGP1302-1B (32°16′N, 158°13′E 2514 m water depth) at the Southern High (1.6 cm/kyr Seo et al., 2018, Palaeo-3, 496, 323-331), located at the southern edge of the KE main pathway. Such difference is possibly resulted from the high surface biological productivity and eolian ?ux along the main axis of KE. The LSRs during the last deglacial period and the glacial period are high (ca. 8 cm/kyr) in both cores, indicating that the detrital input of sediment and surface biological production have been higher during these cold periods. Meanwhile, the highest LSR of 20.1 cm/kyr for the last 30 kyr is recorded in 21.7
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/22832
Bibliographic Citation
2018 AGU Fall Meeting, pp.1, 2018
Publisher
American Geophysical Union
Type
Conference
Language
English
Publisher
American Geophysical Union
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