Youger Dryas and Heinrich events recorded by magnetic susceptibility of sediments from the central temperature area of Western Pacific Warm Pool

Abstract

Three short geomagnetic excursions, the Go thenburg, Mono Lake and Mungo (or Maelifell) in the Brunhes Positive Polarity period, were revealed based on the studies of magnetostratigraphy, susceptibility ( ) and 18 O of sediments in core WP 92-5 from the central temperature area of the Western Pacific Warm Pool (WPWP), and the ages of them are 12.1-11.3 kaBP, 25.0-24.0 kaBP, and 31.0-28.0 kaBP respectively. Furthermore, the Younger Dryas (YD) and Heinrich (H) cold events were also discovered in this core by the susceptibility record. The YD cold event occurred at the depth of 30-22 cm with an age of 11.5-10.6 kaBP; H1, H2 and H3 cold events occurred at depths of 51-39 cm, 108-91 cm and 140-126 cm with ages of 15.1-13.0 kaBP, 25.0-22.1 kaBP and 30.6-28.2 kaBP respectively, which well correspond to the H1, H2, H3 events recorded by susceptibility of core SU90-09 from middle Atlantic, indicating that the susceptibility change of marine sediments can be an important sign of climatic frequent fluctuations.

Sensitivity of Sediment Magnetic Records to Climate Change during Holocene for the Northern South China Sea

“…This correlation implies that total content of all magnetic particles is affected by a common factor. Total concentration of magnetic minerals within marine sediments was proved to be related to variation of temperature despite that sediment magnetic response to climate change differed from different regions within the SCS (Hou et al, 1996;Tang et al, 2003;Zhang et al, 2010;Ouyang et al, 2014a). Variation of χ lf , χ ARM and SIRM for the studied core PC24 was coincident with variation of χ lf for a previous reported core DSH-1C from the northern SCS before 6 cal.…”

“…Previous studies suggested that marine sediment was one of the most important signal carriers of climate change. Therefore, marine sediment magnetic records have been becoming another focus of paleaoclimate research (Arai et al, 1997;Kissel et al, 1999;Oldfield et al, 2003;Tang et al, 2003;Kumar et al, 2005;Sangode et al, 2007;Xu et al, 2011;Larrasoaña et al, 2015). Many magnetic results of the SCS sediments were reported since the past decade.…”

Magnetic records of Core MD77-181 in the Bay of Bengal and their paleoenvironmental implications

“…Although magnetic susceptibility variations can be used to recover paleoclimatic and paleoenvironmental changes [30][31][32][33][34][35] , the diagenetic dissolution of detrital magnetic particles and the occurrence of authigenic magnetic grains may attenuate or even eliminate the magnetic records of primary environmental changes. Particularly, in continental margins of rapid deposition and in some specific environmental settings such as sites of upwelling and high rates of organic productivity and sediment accumulation [23-25, 36, 37] , partially restricted basins such as the Mediterranean or Sea of Japan [38][39][40][41][42] and abyssal plains with organic-rich turbiditic sediments [28,43,44] , etc., magnetic records tend to be impacted by reductive diagenesis.…”

Magnetic characteristics and its environmental implications of core YSJD-86GC sediments from the southern South China Sea

“…Magnetic records were used to identify climatic cycles, sediment sources, changes of the sedimentary environment and reductive diagenesis during post-deposition [8][9][10][11][12][13]. Magnetic research of sediments for the SCS has been concerned since nearly the past 20 years.…”