Cross-Wavelet Analysis: a Tool for Detection of Relationships between Paleoclimate Proxy Records

Prokoph, Andreas; Bilali, Hafida El

doi:10.1007/s11004-008-9170-8

Cited by 35 publications

(24 citation statements)

References 24 publications

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“…Unlike many traditional mathematical methods (for example, Fourier analysis), the wavelet approach can be used to analyse time series that contain non-stationary spectral power at many different frequencies 21 . For geological time series, although visual comparison of plots is commonly used, cross-wavelet analysis permits detection, extraction and reconstruction of relationships between two non-stationary signals simultaneously in frequency (or scale) and time (or location) 69 . The continuous wavelet transform (CWT; Supplementary Fig.…”

Section: Methodsmentioning

confidence: 99%

Glacial ice and atmospheric forcing on the Mertz Glacier Polynya over the past 250 years

et al. 2015

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The Mertz Glacier Polynya off George V Land, East Antarctica, is a source of Adélie Land Bottom Water, which contributes up to B25% of the Antarctic Bottom Water. This major polynya is closely linked to the presence of the Mertz Glacier Tongue that traps pack ice upstream. In 2010, the Mertz Glacier calved a massive iceberg, deeply impacting local sea ice conditions and dense shelf water formation. Here we provide the first detailed 250-year long reconstruction of local sea ice and bottom water conditions. Spectral analysis of the data sets reveals large and abrupt changes in sea surface and bottom water conditions with a B70-year cyclicity, associated with the Mertz Glacier Tongue calving and regrowth dynamics. Geological data and atmospheric reanalysis, however, suggest that sea ice conditions in the polynya were also very sensitive to changes in surface winds in relation to the recent intensification of the Southern Annular Mode.

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Section: Methodsmentioning

confidence: 99%

Glacial ice and atmospheric forcing on the Mertz Glacier Polynya over the past 250 years

et al. 2015

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“…In the present application, the modulus of the cross-wavelet transform W xy (a, b) represents the cross-amplitudes of x(t) and y(t), and it is defined as the cross-wavelet power (Prokoph and El Bilali, 2008) and the plot of W xy (a, b) 2 is called a coscalogram. It has the advantage of revealing pockets of high and low correlation in different frequency bands.…”

Section: Theoretical Analysismentioning

confidence: 99%

Electrophysiological and theoretical analysis of melatonin in peripheral nerve crush injury

Zencirci

Bilgin

Yaraneri

2010

Journal of Neuroscience Methods

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“…A cross-wavelet analysis was performed on the LIP area within the 10°N to 10°S humid belt and proxy-CO 2 time series using the Grinsted et al (2004) Matlab toolbox. Cross-wavelet analysis of time series was proposed by Prokoph and El Bilali (2008) to be used on geologic time series, particularly those with large uncertainties and noise. The analysis window is much narrower than that of other techniques such as a Fourier transform, allowing for greater temporal resolution and the method be applied to both cyclic, and as in this case, time series with chaotic elements.…”

Section: Methodsmentioning

confidence: 99%

The Interplay Between the Eruption and Weathering of Large Igneous Provinces and the Deep‐Time Carbon Cycle

Johansson

Zahirovic

Müller

2018

Geophysical Research Letters

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Although many sources of atmospheric CO2 have been estimated, the major sinks are poorly understood in a deep‐time context. Here we combine plate reconstructions, the eruption ages and outlines of Large Igneous Provinces (LIPs), and the atmospheric CO2 proxy record to investigate how their eruptions and weathering within the equatorial humid zone impacted global atmospheric CO2 since 400 Ma. Wavelet analysis reveals significant correlations between the eruption of the Emeishan LIP (259 Ma), the Siberian Traps (251 Ma), the Central Atlantic Magmatic Province (201 Ma), the second pulse of the North Atlantic Igneous Province (55 Ma), the High Arctic LIP (130 Ma), and the Deccan Traps (65 Ma) and perturbations in atmospheric CO2. Our analysis also reveals a clear relationship between the weathering of the Central Atlantic Magmatic Province (~200–100 Ma), the Deccan Traps (50–35 Ma), and the Afar Arabian LIP (30–0 Ma) and a significant atmospheric CO2 drawdown. Our results illustrate the significant role of subaerial LIP emplacement and weathering in modulating atmospheric CO2 and Earth's surface environments.

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Cross-Wavelet Analysis: a Tool for Detection of Relationships between Paleoclimate Proxy Records

Cited by 35 publications

References 24 publications

Glacial ice and atmospheric forcing on the Mertz Glacier Polynya over the past 250 years

Glacial ice and atmospheric forcing on the Mertz Glacier Polynya over the past 250 years

Electrophysiological and theoretical analysis of melatonin in peripheral nerve crush injury

The Interplay Between the Eruption and Weathering of Large Igneous Provinces and the Deep‐Time Carbon Cycle

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