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Author
Chen, X. ; Zhang, Y. ; Zhang, M. ; Feng, Y. ; Wu, Z. ; Qiao, F. ; Huang, N.E.
Title
Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle
Type
$loc['typeJournal Article']
Year
2013
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
41
Issue
11-12
Pages
2797-2815
Keywords
Ocean heat content ; Modulated annual cycle ; Empirical mode decomposition ; Instantaneous frequency ; Instantaneous amplitude ; CMIP3
Abstract
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Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0930-7575
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
209
Permanent link to this record
Author
Deng, J. ; Wu, Z. ; Zhang, M. ; Huang, N.E. ; Wang, S. ; Qiao, F.
Title
Data concerning statistical relation between obliquity and Dansgaard-Oeschger events
Type
$loc['typeJournal Article']
Year
2019
Publication
Abbreviated Journal
Data Brief
Volume
23
Issue
Pages
Keywords
Dansgaard-Oeschger events ; Obliquity ; Surrogate data ; Time-varying Shannon entropy
Abstract
Data presented are related to the research article entitled “Using Holo-Hilbert spectral analysis to quantify the modulation of Dansgaard-Oeschger events by obliquity” (J. Deng et al., 2018). The datasets in Deng et al. (2018) are analyzed on the foundation of ensemble empirical mode decomposition (EEMD) (Z.H. Wu and N.E. Huang, 2009), and reveal more occurrences of Dansgaard-Oeschger (DO) events in the decreasing phase of obliquity. Here, we report the number of significant high Shannon entropy (SE) (C.E. Shannon and W. Weaver, 1949) of 95% significance level of DO events in the increasing and decreasing phases of obliquity, respectively. First, the proxy time series are filtered by EEMD to obtain DO events. Then, the time-varying SE of DO modes are calculated on the basis of principle of histogram. The 95% significance level is evaluated through surrogate data (T. Schreiber and A. Schmitz, 1996). Finally, a comparison between the numbers of SE values that are larger than 95% significance level in the increasing and decreasing phases of obliquity, respectively, is reported.
Address
Key Laboratory of Marine Sciences and Numerical Modelling, Ministry of Natural Resources, Qingdao 266061, PR China
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
2352-3409
ISBN
Medium
Area
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Conference
Funding
strtoupper('3').strtolower('1372394'); strtoupper('P').strtolower('MC6660458')
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1068
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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Edition
ISSN
0277-3791
ISBN
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
971
Permanent link to this record
Author
Feng, J. ; Wu, Z. ; Liu, G.
Title
Fast Multidimensional Ensemble Empirical Mode Decomposition Using a Data Compression Technique
Type
$loc['typeJournal Article']
Year
2014
Publication
Journal of Climate
Abbreviated Journal
J. Climate
Volume
27
Issue
10
Pages
3492-3504
Keywords
Data processing ; Data quality control ; Time series
Abstract
Address
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Thesis
Publisher
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Summary Language
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Series Editor
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Abbreviated Series Title
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Series Issue
Edition
ISSN
0894-8755
ISBN
Medium
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
126
Permanent link to this record
Author
Feng, J. ; Wu, Z. ; Zou, X.
Title
Sea Surface Temperature Anomalies off Baja California: A Possible Precursor of ENSO
Type
$loc['typeJournal Article']
Year
2014
Publication
Journal of the Atmospheric Sciences
Abbreviated Journal
J. Atmos. Sci.
Volume
71
Issue
5
Pages
1529-1537
Keywords
ENSO ; El Nino
Abstract
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Publisher
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
0022-4928
ISBN
Medium
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
127
Permanent link to this record
Author
Fu, C.B. ; Qian, C. ; Wu, Z.H.
Title
Projection of global mean surface air temperature changes in next 40 years: Uncertainties of climate models and an alternative approach
Type
$loc['typeJournal Article']
Year
2011
Publication
Science China Earth Sciences
Abbreviated Journal
Sci. China Earth Sci.
Volume
54
Issue
9
Pages
1400-1406
Keywords
decadal prediction ; global warming ; multi-decadal climate variability ; the Ensemble Empirical Mode Decomposition ; CMIP3 multi-model
Abstract
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Thesis
Publisher
Place of Publication
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
1674-7313
ISBN
Medium
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
293
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Author
Hou, T.Y. ; Yan, M.P. ; Wu, Z.
Title
A Variant Of The Emd Method For Multi-Scale Data
Type
$loc['typeJournal Article']
Year
2009
Publication
Advances in Adaptive Data Analysis
Abbreviated Journal
Adv. Adapt. Data Anal.
Volume
01
Issue
04
Pages
483-516
Keywords
Empirical Mode Decomposition (EMD) ; adaptive data analysis ; sparse representation
Abstract
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Thesis
Publisher
Place of Publication
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Summary Language
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Series Editor
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Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1793-5369
ISBN
Medium
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
670
Permanent link to this record
Author
Hu, X. ; Cai, M. ; Yang, S. ; Wu, Z.
Title
Delineation of thermodynamic and dynamic responses to sea surface temperature forcing associated with El Niño
Type
$loc['typeJournal Article']
Year
2018
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
51
Issue
11-12
Pages
4329-4344
Keywords
El Niño ; SST anomalies ; Thermodynamic and dynamic responses ; Gill-type response
Abstract
A new framework is proposed to gain a better understanding of the response of the atmosphere over the tropical Pacific to the radiative heating anomaly associated with the sea surface temperature (SST) anomaly in canonical El Niño winters. The new framework is based on the equilibrium balance between thermal radiative cooling anomalies associated with air temperature response to SST anomalies and other thermodynamic and dynamic processes. The air temperature anomalies in the lower troposphere are mainly in response to radiative heating anomalies associated with SST, atmospheric water vapor, and cloud anomalies that all exhibit similar spatial patterns. As a result, air temperature induced thermal radiative cooling anomalies would balance out most of the radiative heating anomalies in the lower troposphere. The remaining part of the radiative heating anomalies is then taken away by an enhancement (a reduction) of upward energy transport in the central-eastern (western) Pacific basin, a secondary contribution to the air temperature anomalies in the lower troposphere. Above the middle troposphere, radiative effect due to water vapor feedback is weak. Thermal radiative cooling anomalies are mainly in balance with the sum of latent heating anomalies, vertical and horizontal energy transport anomalies associated with atmospheric dynamic response and the radiative heating anomalies due to changes in cloud. The pattern of Gill-type response is attributed mainly to the non-radiative heating anomalies associated with convective and large-scale energy transport. The radiative heating anomalies associated with the anomalies of high clouds also contribute positively to the Gill-type response. This sheds some light on why the Gill-type atmospheric response can be easily identifiable in the upper atmosphere.
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ISSN
0930-7575
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
997
Permanent link to this record
Author
Hu, Z.-Z. ; Huang, B. ; Kinter, J.L. ; Wu, Z. ; Kumar, A.
Title
Connection of the stratospheric QBO with global atmospheric general circulation and tropical SST. Part II: interdecadal variations
Type
$loc['typeJournal Article']
Year
2012
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
38
Issue
1-2
Pages
25-43
Keywords
Stratospheric QBO ; Tropical Pacific SST ; Interdecadal variation ; Walker circulation ; Tropical deep convection ; ERA40 and NCEP/NCAR reanalyses ; ENSO
Abstract
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Thesis
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Summary Language
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Series Issue
Edition
ISSN
0930-7575
ISBN
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
260
Permanent link to this record
Author
Huang, B. ; Hu, Z.-Z. ; Kinter, J.L. ; Wu, Z. ; Kumar, A.
Title
Connection of stratospheric QBO with global atmospheric general circulation and tropical SST. Part I: methodology and composite life cycle
Type
$loc['typeJournal Article']
Year
2012
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
38
Issue
1-2
Pages
1-23
Keywords
Stratospheric QBO ; Tropical Pacific SST ; Walker circulation ; Deep convection ; Atmospheric stability ; ERA40 and NCEP/NCAR reanalyses
Abstract
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Corporate Author
Thesis
Publisher
Place of Publication
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Summary Language
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ISSN
0930-7575
ISBN
Medium
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
259
Permanent link to this record