Records
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Author
Huang, B. ; Hu, Z.-Z. ; Schneider, E.K. ; Wu, Z. ; Xue, Y. ; Klinger, B.
Title
Influences of tropical-extratropical interaction on the multidecadal AMOC variability in the NCEP climate forecast system
Type
$loc['typeJournal Article']
Year
2012
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
39
Issue
3-4
Pages
531-555
Keywords
Abstract
Address
Corporate Author
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
244
Permanent link to this record
Author
Huang, N.E. ; Wu, Z. ; Long, S.R. ; Arnold, K.C. ; Chen, X. ; Blank, K.
Title
On Instantaneous Frequency
Type
$loc['typeJournal Article']
Year
2009
Publication
Advances in Adaptive Data Analysis
Abbreviated Journal
Adv. Adapt. Data Anal.
Volume
01
Issue
02
Pages
177-229
Keywords
Instantaneous frequency ; Hilbert transform ; quadrature ; empirical mode decomposition ; normalized intrinsic mode function ; empirical AM/FM decomposition
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1793-5369
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
668
Permanent link to this record
Author
Huang, N.E. ; Wu, Z. ; Pinzón, J.E. ; Parkinson, C.L. ; Long, S.R. ; Blank, K. ; Gloersen, P. ; Chen, X.
Title
Reductions Of Noise And Uncertainty In Annual Global Surface Temperature Anomaly Data
Type
$loc['typeJournal Article']
Year
2009
Publication
Advances in Adaptive Data Analysis
Abbreviated Journal
Adv. Adapt. Data Anal.
Volume
01
Issue
03
Pages
447-460
Keywords
Global temperature change ; down sampling ; HHT filtering
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1793-5369
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
671
Permanent link to this record
Author
Ji, F. ; Wu, Z. ; Huang, J. ; Chassignet, E.P.
Title
Evolution of land surface air temperature trend
Type
$loc['typeJournal Article']
Year
2014
Publication
Nature Climate Change
Abbreviated Journal
Nature Climate change
Volume
4
Issue
6
Pages
462-466
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1758-678X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
131
Permanent link to this record
Author
Liu, M. ; Lin, J. ; Wang, Y. ; Sun, Y. ; Zheng, B. ; Shao, J. ; Chen, L. ; Zheng, Y. ; Chen, J. ; Fu, T.-M. ; Yan, Y. ; Zhang, Q. ; Wu, Z.
Title
Spatiotemporal variability of NO2 and PM2.5 over Eastern China: observational and model analyses with a novel statistical method
Type
$loc['typeJournal Article']
Year
2018
Publication
Atmospheric Chemistry and Physics
Abbreviated Journal
Atmos. Chem. Phys.
Volume
18
Issue
17
Pages
12933-12952
Keywords
TROPOSPHERIC NITROGEN-DIOXIDE ; PROVINCIAL CAPITAL CITIES ; CRITERIA AIR-POLLUTANTS ; BOUNDARY-LAYER ; NORTH CHINA ; HILBERT SPECTRUM ; UNITED-STATES ; TIME-SERIES ; OZONE ; EMISSIONS
Abstract
Eastern China (27-41 degrees N, 110-123 degrees E) is heavily polluted by nitrogen dioxide (NO2), particulate matter with aerodynamic diameter below 2.5 mu m (PM2.5), and other air pollutants. These pollutants vary on a variety of temporal and spatial scales, with many temporal scales that are nonperiodic and nonstationary, challenging proper quantitative characterization and visualization. This study uses a newly compiled EOF-EEMD analysis visualization package to evaluate the spatiotemporal variability of ground-level NO2, PM2.5, and their associations with meteorological processes over Eastern China in fall-winter 2013. Applying the package to observed hourly pollutant data reveals a primary spatial pattern representing Eastern China synchronous variation in time, which is dominated by diurnal variability with a much weaker day-to-day signal. A secondary spatial mode, representing north-south opposing changes in time with no constant period, is characterized by wind-related dilution or a buildup of pollutants from one day to another. We further evaluate simulations of nested GEOS-Chem v9-02 and WRF/CMAQ v5.0.1 in capturing the spatiotemporal variability of pollutants. GEOS-Chem underestimates NO2 by about 17 mu g m(-3) and PM2.5 by 35 mu g m(-3 )on average over fall-winter 2013. It reproduces the diurnal variability for both pollutants. For the day-to-day variation, GEOS-Chem reproduces the observed north-south contrasting mode for both pollutants but not the Eastern China synchronous mode (especially for NO2). The model errors are due to a first model layer too thick (about 130 m) to capture the near-surface vertical gradient, deficiencies in the nighttime nitrogen chemistry in the first layer, and missing secondary organic aerosols and anthropogenic dust. CMAQ overestimates the diurnal cycle of pollutants due to too-weak boundary layer mixing, especially in the nighttime, and overestimates NO2 by about 30 mu g m(-3) and PM2.5 by 60 mu g m(-3). For the day-to-day variability, CMAQ reproduces the observed Eastern China synchronous mode but not the north-south opposing mode of NO2. Both models capture the day-to-day variability of PM2.5 better than that of NO2. These results shed light on model improvement. The EOF-EEMD package is freely available for noncommercial uses.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1680-7324
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
946
Permanent link to this record
Author
Liu, Q. ; Tan, Z-M. ; Sun, J. ; Hou, Y. ; Fu, C. ; Wu, Z.
Title
Changing rapid weather variability increases influenza epidemic risk in a warming climate
Type
$loc['typeJournal Article']
Year
2020
Publication
Environmental Research Letters
Abbreviated Journal
Environmental Research Letters
Volume
15
Issue
4
Pages
Keywords
Abstract
The continuing change of the Earth's climate is believed to affect the influenza viral activity and transmission in the coming decades. However, a consensus of the severity of the risk of influenza epidemic in a warming climate has not been reached. It was previously reported that the warmer winter can reduce influenza epidemic-caused mortality, but this relation cannot explain the deadly influenza epidemic in many countries over northern mid-latitudes in the winter of 2017-2018, one of the warmest winters in recent decades. Here we reveal that the widely spread 2017-2018 influenza epidemic can be attributed to the abnormally strong rapid weather variability. We demonstrate, from historical data, that the large rapid weather variability in autumn can precondition the deadly influenza epidemic in the subsequent months in highly populated northern mid-latitudes; and the influenza epidemic season of 2017-2018 was a typical case. We further show that climate model projections reach a consensus that the rapid weather variability in autumn will continue to strengthen in some regions of northern mid-latitudes in a warming climate, implying that the risk of influenza epidemic may increase 20% to 50% in some highly populated regions in later 21st century.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1070
Permanent link to this record
Author
Liu, Y. ; Tan, Z.-M. ; Wu, Z.
Title
Noninstantaneous Wave-CISK for the Interaction between Convective Heating and Low-Level Moisture Convergence in the Tropics
Type
$loc['typeJournal Article']
Year
2019
Publication
Journal of the Atmospheric Sciences
Abbreviated Journal
J. Atmos. Sci.
Volume
76
Issue
7
Pages
2083-2101
Keywords
Convection ; Diabatic heating ; Moisture ; moisture budget
Abstract
The interaction between tropical convective heating and thermally forced circulation is investigated using a global dry primitive-equation model with the parameterization of wave-conditional instability of the second kind (CISK). It is demonstrated that deep convective heating can hardly sustain itself through the moisture convergence at low levels regardless of the fraction of immediate consumption of converged moisture. In contrast, when the fraction is large, shallow convective heating and its forced circulation exhibit preferred growth of small scales. As the “CISK catastrophe” mainly comes from the instantaneous characters of moisture-convection feedback in the conventional wave-CISK, a noninstantaneous wave-CISK is proposed, which highlights the accumulation-consumption (AC) time scale for the convective heating accumulation and/or the converged moisture consumption. In the new wave-CISK, once moisture is converged, the release of latent heat takes place gradually within an AC time scale. In this sense, convective heating is not only related to the instantaneous moisture convergence at the current time, but also to that which occurred in the past period of the AC time scale. The noninstantaneous wave-CISK could guarantee the occurrence of convective heating and/or moisture convergence at larger scales, and then favor the growth of long waves, and thus solve the problem of CISK catastrophe. With the new wave-CISK and AC time scale of 2 days, the simulated convective heating-driven system bears a large similarity to that of the observed convectively coupled Kelvin wave.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0022-4928
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1065
Permanent link to this record
Author
Misra, V. ; Li, H. ; Wu, Z. ; DiNapoli, S.
Title
Global seasonal climate predictability in a two tiered forecast system: part I: boreal summer and fall seasons
Type
$loc['typeJournal Article']
Year
2014
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
42
Issue
5-6
Pages
1425-1448
Keywords
Abstract
Address
Corporate Author
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
142
Permanent link to this record
Author
Qian, C. ; Fu, C. ; Wu, Z.
Title
Changes in the Amplitude of the Temperature Annual Cycle in China and Their Implication for Climate Change Research
Type
$loc['typeJournal Article']
Year
2011
Publication
Journal of Climate
Abbreviated Journal
J. Climate
Volume
24
Issue
20
Pages
5292-5302
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0894-8755
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
287
Permanent link to this record
Author
Qian, C. ; Fu, C. ; Wu, Z. ; Yan, Z.
Title
The role of changes in the annual cycle in earlier onset of climatic spring in northern China
Type
$loc['typeJournal Article']
Year
2011
Publication
Advances in Atmospheric Sciences
Abbreviated Journal
Adv. Atmos. Sci.
Volume
28
Issue
2
Pages
284-296
Keywords
spring onset ; Ensemble Empirical Mode Decomposition ; modulated annual cycle ; Asian winter monsoon ; global warming
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0256-1530
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
309
Permanent link to this record