Late Holocene climate variability from Lake Pupuke maar, Auckland, New Zealand

Spectral analyses of quasi-annual organo-diatomaceous laminae couplets in an Auckland maar lake indicate brief (sub-decadal scale) episodes with strong spectral power and long periods of weak to no spectral power between c. 1700 to c. 550 cal. yr BP. Laminae couplet thickness appears to be a functio...

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Bibliographic Details
Published in:Quaternary Science Reviews
Main Authors: Striewski, B., Shulmeister, J., Augustinus, P. C., Soderholm, J.
Format: Article in Journal/Newspaper
Language:English
Published: Pergamon 2013
Subjects:
Lake Pupuke
Auckland
New Zealand
Lacustrine sediment sequences
Quasi-annual organo-diatomaceous laminae couplets
Laminae couplet thickness
Spectral analysis
Changes of wind regime
El Nino–southern oscillation
Diatom productivity
Southern Ocean
1105 Ecology
Evolution
Behavior and Systematics
1204 Archaeology
1907 Geology
2306 Global and Planetary Change
3302 Archaeology
Online Access:https://espace.library.uq.edu.au/view/UQ:308369
Description
Summary:Spectral analyses of quasi-annual organo-diatomaceous laminae couplets in an Auckland maar lake indicate brief (sub-decadal scale) episodes with strong spectral power and long periods of weak to no spectral power between c. 1700 to c. 550 cal. yr BP. Laminae couplet thickness appears to be a function of changes in wind flow over the basin, with enhanced wind flow deepening the mixing zone and providing additional nutrients for laminae formation. Aeolian dust from Australia amplifies the wind signal. Spectral signals in the high power episodes are focused in

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