Total organic carbon (TOC) on ground bulk and carbonate-free sediment samples of ODP Hole 151-911A


Autoria(s): Knies, Jochen; Matthiessen, Jens; Vogt, Christoph; Stein, Ruediger
Cobertura

LATITUDE: 80.477430 * LONGITUDE: 8.227300 * DATE/TIME START: 1993-08-22T06:15:00 * DATE/TIME END: 1993-08-26T21:34:00 * MINIMUM DEPTH, sediment/rock: 219.71 m * MAXIMUM DEPTH, sediment/rock: 505.37 m

Data(s)

21/09/2002

Resumo

A multiproxy analysis of Hole 911A (Ocean Drilling Program (ODP) Leg 151) drilled on the Yermak Plateau (eastern Arctic Ocean) is used to investigate the behaviour of the Svalbard/Barents Sea ice sheet (SBIS) during late Pliocene and early Pleistocene (~3.0-1.7 Ma) climate changes. Contemporary with the 'Mid-Pliocene (~3 Ma) global warmth' (MPGW), a warmer period lasting ~300 kyr with seasonally ice-free conditions in the marginal eastern Arctic Ocean is assumed to be an important regional moisture source, and possibly one decisive trigger for intensification of the Northern Hemisphere glaciation in the Svalbard/Barents Sea area at ~2.7 Ma. An abrupt pulse of ice-rafted debris (IRD) to the Yermak Plateau at ~2.7 Ma reflects distinct melting of sediment-laden icebergs derived from the SBIS and may indicate the protruding advance of the ice sheet onto the outer shelf. Spectral analysis of the total organic carbon (TOC) record being predominantly of terrigenous/fossil-reworked origin indicates SBIS and possibly Scandinavian Ice Sheet response to incoming solar radiation at obliquity and precession periodicities. The strong variance in frequencies near the 41 kyr obliquity cycle between 2.7 and 1.7 Ma indicates, for the first time in the Arctic Ocean, a close relationship of SBIS growth and decay patterns to the Earth's orbital obliquity amplitudes, which dominated global ice volume variations during late Pliocene/early Pleistocene climate changes.

Formato

text/tab-separated-values, 606 data points

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.88348

doi:10.1594/PANGAEA.88348

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Knies, Jochen; Matthiessen, Jens; Vogt, Christoph; Stein, Ruediger (2002): Evidence of Mid Pliocene (3 Ma) global warmth in the eastern Arctic Ocean and implications for the Svalbard/Barents Sea ice sheet during the late Pliocene and early Pleistocene. Boreas, 31(1), 82-93, doi:10.1111/j.1502-3885.2002.tb01058.x

Palavras-Chave #151-911A; AGE; Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Element analyser CHN Rapid, Heraeus; Joides Resolution; Leg151; North Greenland Sea; Ocean Drilling Program; ODP
Tipo

Dataset