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Author
Ali, M.M. ; Bhowmick, S.A. ; Sharma, R. ; Chaudhury, A. ; Pezzullo, J.C. ; Bourassa, M.A. ; Ramana, I.V. ; Niharika, K.
Title
An Artificial Neural Network Model Function (AMF) for SARAL-Altika Winds
Type
$loc['typeJournal Article']
Year
2015
Publication
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated Journal
IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing
Volume
8
Issue
11
Pages
5317-5323
Keywords
AltiKa ; artificial neural network (ANN) ; geophysical data records ; wind speed
Abstract
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Edition
ISSN
1939-1404
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Conference
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
118
Permanent link to this record
Author
Bunge, L. ; Clarke, A.J.
Title
On the Warm Water Volume and Its Changing Relationship with ENSO
Type
$loc['typeJournal Article']
Year
2014
Publication
Journal of Physical Oceanography
Abbreviated Journal
J. Phys. Oceanogr.
Volume
44
Issue
5
Pages
1372-1385
Keywords
Physical Meteorology and Climatology ; Climate variability ; ENSO ; Observational techniques and algorithms ; Climate records ; Variability ; Decadal variability ; Interannual variability
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ISSN
0022-3670
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
156
Permanent link to this record
Author
Deng, J. ; Wu, Z. ; Zhang, M. ; Huang, N.E. ; Wang, S. ; Qiao, F.
Title
Using Holo-Hilbert spectral analysis to quantify the modulation of Dansgaard-Oeschger events by obliquity
Type
$loc['typeJournal Article']
Year
2018
Publication
Quaternary Science Reviews
Abbreviated Journal
Quaternary Science Reviews
Volume
192
Issue
Pages
282-299
Keywords
Pleistocene ; Paleoclimatology ; Greenland ; Antarctica ; Data treatment ; Data analysis ; Dansgaard-oeschger (DO) events ; Obliquity forcing ; Phase preference ; Holo-hilbert spectral analysis ; Amplitude modulation ; EMPIRICAL MODE DECOMPOSITION ; GREENLAND ICE-CORE ; NONSTATIONARY TIME-SERIES ; ABRUPT CLIMATE-CHANGE ; LAST GLACIAL PERIOD ; NORTH-ATLANTIC ; MILLENNIAL-SCALE ; RECORDS ; VARIABILITY ; CYCLE
Abstract
Astronomical forcing (obliquity and precession) has been thought to modulate Dansgaard-Oeschger (DO) events, yet the detailed quantification of such modulations has not been examined. In this study, we apply the novel Holo-Hilbert Spectral Analysis (HHSA) to five polar ice core records, quantifying astronomical forcing's time-varying amplitude modulation of DO events and identifying the preferred obliquity phases for large amplitude modulations. The unique advantages of HHSA over the widely used windowed Fourier spectral analysis for quantifying astronomical forcing's nonlinear modulations of DO events is first demonstrated with a synthetic data that closely resembles DO events recorded in Greenland ice cores (NGRIP, GRIP, and GISP2 cores on GICC05 modelext timescale). The analysis of paleoclimatic proxies show that statistically significantly more frequent DO events, with larger amplitude modulation in the Greenland region, tend to occur in the decreasing phase of obliquity, especially from its mean value to its minimum value. In the eastern Antarctic, although statistically significantly more DO events tend to occur in the decreasing obliquity phase in general, the preferred phase of obliquity for large amplitude modulation on DO events is a segment of the increasing phase near the maximum obliquity, implying that the physical mechanisms of DO events may be different for the two polar regions. Additionally, by using cross-spectrum and magnitude-squared analyses, Greenland DO mode at a timescale of about 1400 years leads the Antarctic DO mode at the same timescale by about 1000 years. (C) 2018 Elsevier Ltd. All rights reserved.
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Series Editor
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ISSN
0277-3791
ISBN
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Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
971
Permanent link to this record
Author
Gilford, D.M. ; Smith, S.R. ; Griffin, M.L. ; Arguez, A.
Title
Southeastern U.S. Daily Temperature Ranges Associated with the El Niño-Southern Oscillation
Type
$loc['typeJournal Article']
Year
2013
Publication
Journal of Applied Meteorology and Climatology
Abbreviated Journal
J. Appl. Meteor. Climatol.
Volume
52
Issue
11
Pages
2434-2449
Keywords
Climate variability ; Climatology ; ENSO ; Surface temperature ; Climate records
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ISSN
1558-8424
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
180
Permanent link to this record