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Solar forcing and El Niño-Southern Oscillation (ENSO) influences on productivity cycles interpreted from a late-Holocene high-resolution marine sediment record, Adélie Drift, East Antarctic Margin

Open-File Report 2007-1047-SRP-036

By:
, , , , , , , ,
DOI: 10.3133/ofr20071047SRP036

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Abstract

Core JPC17B was collected from the Adélie-Drift, a nearly 300-m thick drift deposit at 140ºE along the Indian Ocean sector of the Antarctic continental shelf. Sediments consist of nearly continuously laminated diatom mud and diatom ooze, with accumulation rates on the order of 20-21 m kyr-1 based on 10 AMS radiocarbon dates. Spectral analysis was performed on time series of opal content, d13Corg, Ti content, and Ba content. Strong decadal to century- scale variability is present in all proxies. Opal and Ti-time series show strong variance at periods of 11, 22 and 110- years, which are suggestive of solar forcing. Ba-time series exhibits strong variance at a period of 3-3.6-yr, consistent with possible El Niño-Southern-Oscillation (ENSO) forcing.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Solar forcing and El Niño-Southern Oscillation (ENSO) influences on productivity cycles interpreted from a late-Holocene high-resolution marine sediment record, Adélie Drift, East Antarctic Margin
Series title:
Open-File Report
Series number:
2007-1047-SRP-036
DOI:
10.3133/ofr20071047SRP036
Year Published:
2007
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
6 p.
Larger Work Type:
Report
Larger Work Subtype:
USGS Numbered Series
Other Geospatial:
Antarctica
Additional Online Files(Y/N):
N