Environmental magnetic measurements of marine sediments from Antarctica: implications to paleoclimate changes during the past 15 ka

• Main Authors: Hongming, Hou, Baogui, Wang, Xianzan, Tang, Youlang, Luo, Honghan, Zheng
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polar Research Institute of China - PRIC 1997
• Subjects: Prydz Bay; Maxwell Bay; Wall Bay; Advances in Polar Science; Antarc*; Antarctica; Polar Science
• Online Access: http://library.arcticportal.org/2125/; http://library.arcticportal.org/2125/1/A701.005.pdf

In this paper, authors report some results obtained from systematic rock magnetic measurements on Core NP95-1 and Core NG93-1, which were collected from the Prydz Bay, Eastern Antarctica and Great Wall Bay (Maxwell Bay), Western Antarctica respectively during the 11th and 9th CHINARE and a sequence of paleoclimate variations is well established based on sediment rock magnetic properties. In Antarctica, the magnetic properties show a close linkage to paleoenvironmental variations. The Core NP95-1 well recorded several paleoclimatic events, such as Heinrich event 1, Bolling-Allerod warm period and Younger Dryas cold event. The Heinrich event 1 occurred at about 14.2 ka B.P., Younger Dryas cold event occurred between 11.7 ka B.P. and 10.3 ka B.P., and the boundary of Pleistocene and Holocene in Antarctica is 10.3 ka B.P. In Holocene, two warm periods were recorded at about 10.0 ka B.P. and 6.0 ka B.P. with a little cold period between them. After 6.0 ka B.P., two cores both recorded a cold climatic oscillation. Paleoclimate described by two cores rock magnetic measurements was simultaneously changed in Eastern and Western Antarctica during the same period two cores commonly covered.