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Author
Laxenaire, R., Speich, S., & Alexandre S
Title
Evolution of the thermohaline structure of one Agulhas Ring reconstructed from satellite altimetry and Argo floats. Journal of Geophysical Research
Type
$loc['typeJournal Article']
Year
2019
Publication
Oceans
Abbreviated Journal
Volume
124
Issue
12
Pages
8969-9003
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$loc['no']
Call Number
COAPS @ user @
Serial
1096
Permanent link to this record
Author
Xu, X. ; Bower, A. ; Furey, H. ; Chassignet, E.P.
Title
Variability of the Iceland-Scotland Overflow Water Transport Through the Charlie-Gibbs Fracture Zone: Results From an Eddying Simulation and Observations
Type
$loc['typeJournal Article']
Year
2018
Publication
Journal of Geophysical Research: Oceans
Abbreviated Journal
J. Geophys. Res. Oceans
Volume
Issue
8
Pages
Keywords
Abstract
Observations show that the westward transport of the Iceland‐Scotland overflow water (ISOW) through the Charlie‐Gibbs Fracture Zone (CGFZ) is highly variable. This study examines (a) where this variability comes from and (b) how it is related to the variability of ISOW transport at upstream locations in the Iceland Basin and other ISOW flow pathways. The analyses are based on a 35‐year 1/12° eddying Atlantic simulation that represents well the main features of the observed ISOW in the area of interest, in particular, the transport variability through the CGFZ. The results show that (a) the variability of the ISOW transport is closely correlated with that of the barotropic transports in the CGFZ associated with the meridional displacement of the North Atlantic Current front and is possibly induced by fluctuations of large‐scale zonal wind stress in the Western European Basin east of the CGFZ; (b) the variability of the ISOW transport is increased by a factor of 3 from the northern part of the Iceland Basin to the CGFZ region and transport time series at these two locations are not correlated, further suggesting that the variability at the CGFZ does not come from the upstream source; and (c) the variability of the ISOW transport at the CGFZ is strongly anticorrelated to that of the southward ISOW transport along the eastern flank of the Mid‐Atlantic Ridge, suggesting an out‐of‐phase covarying transport between these two ISOW pathways.
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Series Editor
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Edition
ISSN
2169-9275
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Medium
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1023
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Author
Roberts, M.J. ; Jackson, L.C. ; Roberts, C.D. ; Meccia, V. ; Docquier, D. ; Koenigk, T. ; Ortega, P. ; Moreno‐ ; Chamarro, E. ; Bellucci, A. ; Coward, A. ; Drijfhout, S. ; Exarchou, E. ; Gutjahr, O. ; Hewitt, H. ; Iovino, D. ; Lohmann, K. ; Putrasahan, D. ; Schiemann, R. ; Seddon, J. ; Terray, L. ; Xu, X. ; Zhang, Q. ; Chang, P. ; Yeager, S.G. ; Castruccio, F.S. ; Zhang. C. ; Wu, L.
Title
Sensitivity of the Atlantic Meridional Overturning Circulation to Model Resolution in CMIP6 HighResMIP Simulations and Implications for Future Changes
Type
$loc['typeJournal Article']
Year
2020
Publication
Journal of Advances in Modeling Earth Systems
Abbreviated Journal
J. Adv. Model. Earth Syst.
Volume
Issue
Pages
Accepted
Keywords
Abstract
A multi‐model, multi‐resolution ensemble using CMIP6 HighResMIP coupled experiments is used to assess the performance of key aspects of the North Atlantic circulation. The Atlantic Meridional Overturning Circulation (AMOC), and related heat transport, tends to become stronger as ocean model resolution is enhanced, better agreeing with observations at 26.5°N. However for most models the circulation remains too shallow compared to observations, and has a smaller temperature contrast between the northward and southward limbs of the AMOC. These biases cause the northward heat transport to be systematically too low for a given overturning strength. The higher resolution models also tend to have too much deep mixing in the subpolar gyre. In the period 2015‐2050 the overturning circulation tends to decline more rapidly in the higher resolution models, which is related to both the mean state and to the subpolar gyre contribution to deep water formation. The main part of the decline comes from the Florida Current component of the circulation. Such large declines in AMOC are not seen in the models with resolutions more typically used for climate studies, suggesting an enhanced risk for Northern Hemisphere climate change. However, only a small number of different ocean models are included in the study.
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$loc['no']
Call Number
COAPS @ user @
Serial
1109
Permanent link to this record
Author
Stukel, M.R. ; Décima, M. ; Landry, M.R. ; Selph, K.E.
Title
Nitrogen and isotope flows through the Costa Rica Dome upwelling ecosystem: The crucial mesozooplankton role in export flux
Type
$loc['typeJournal Article']
Year
2018
Publication
Global Biogeochemical Cycles
Abbreviated Journal
Global Biogeochemical Cycles
Volume
32
Issue
12
Pages
1815–1832.
Keywords
Crustaceans ; Diel vertical migration ; Nitrogen cycle ; Biological carbon pump ; Nitrogen isotopes ; Linear inverse ecosystem model
Abstract
The Costa Rica Dome (CRD) is an open-ocean upwelling ecosystem, with high biomasses of picophytoplankton (especially Synechococcus), mesozooplankton, and higher trophic levels. To elucidate the food web pathways supporting the trophic structure and carbon export in this unique ecosystem, we used Markov Chain Monte Carlo techniques to assimilate data from four independent realizations of δ15N and planktonic rate measurements from the CRD into steady state, multicompartment ecosystem box models (linear inverse models). Model results present well-constrained snapshots of ecosystem nitrogen and stable isotope fluxes. New production is supported by upwelled nitrate, not nitrogen fixation. Protistivory (rather than herbivory) was the most important feeding mode for mesozooplankton, which rely heavily on microzooplankton prey. Mesozooplankton play a central role in vertical nitrogen export, primarily through active transport of nitrogen consumed in the surface layer and excreted at depth, which comprised an average 36-46% of total export. Detritus or aggregate feeding is also an important mode of resource acquisition by mesozooplankton and regeneration of nutrients within the euphotic zone. As a consequence, the ratio of passively sinking particle export to phytoplankton production is very low in the CRD. Comparisons to similar models constrained with data from the nearby equatorial Pacific demonstrate that the dominant role of vertical migrators to the biological pump is a unique feature of the CRD. However, both regions show efficient nitrogen transfer from mesozooplankton to higher trophic levels (as expected for regions with large fish, cetacean, and seabird populations) despite the dominance of protists as major grazers of phytoplankton.
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$loc['no']
Call Number
COAPS @ rl18 @
Serial
978
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Author
Morey, S. L. ; Zavala-Hidalgo, J. ; O'Brien, J. J.
Title
The seasonal variability of continental shelf circulation in the northern and western Gulf of Mexico from a high-resolution numerical model
Type
$loc['typeBook Chapter']
Year
2005
Publication
New Developments in the Circulation of the Gulf of Mexico
Abbreviated Journal
Volume
Issue
Pages
Keywords
Ocean circulation� ; Mexico, Gulf of� ; Remote sensing ; Ocean circulation� ; Mexico, Gulf of� ; Mathematical models
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Sturges, W.; Lugo-Fernandez, A.
Language
Summary Language
Original Title
Series Editor
Series Title
Geophys. Mongr. Ser.
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Series Volume
Series Issue
161
Edition
ISSN
ISBN
Medium
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Conference
Funding
ONR, NASA, MMS
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
852
Permanent link to this record
Author
Kranz, S.A. ; Wang, S. ; Kelly, T.B. ; Stukel, M.R. ; Goericke, R. ; Landry, M.R. ; Cassar, N.
Title
Lagrangian Studies of Marine Production: A Multimethod Assessment of Productivity Relationships in the California Current Ecosystem Upwelling Region
Type
$loc['typeJournal Article']
Year
2020
Publication
Journal of Geophysical Research: Oceans
Abbreviated Journal
J. Geophys. Res. Oceans
Volume
125
Issue
6
Pages
Keywords
gross primary production ; long‐ ; term ecological research ; equilibrium inlet mass spectrometry ; carbon export ; net community production
Abstract
A multimethod process‐oriented investigation of diverse productivity measures in the California Current Ecosystem (CCE) Long‐Term Ecological Research study region, a complex physical environment, is presented. Seven multiday deployments covering a transition region from high to low productivity were conducted over two field expeditions (spring 2016 and summer 2017). Employing a Lagrangian study design, water parcels were followed over several days, comparing 24‐h in situ measurements (14C and 15NO3 ‐uptake, dilution estimates of phytoplankton growth, and microzooplankton grazing) with high‐resolution productivity measurements by fast repetition rate fluorometry (FRRF) and equilibrium inlet mass spectrometry (EIMS), and integrated carbon export measuremnts using sediment traps. Results show the importance of accounting for temporal and fine spatial scale variability when estimating ecosystem production. FRRF and EIMS measurements resolved diel patterns in gross primary and net community production. Diel productivity changes agreed well with comparably more traditional measurements. While differences in productivity metrics calculated over different time intervals were considerable, as those methods rely on different base assumptions, the data can be used to explain ecosystem processes which would otherwise have gone unnoticed. The processes resolved from this method comparison further understanding of temporal and spatial coupling and decoupling of surface productivity and potential carbon burial in a gradient from coastal to offshore ecosystems.
Address
Corporate Author
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
2169-9275
ISBN
Medium
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Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1113
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Author
Powell, M.
Title
), Observing and Analyzing the Near-Surface Wind Field in Tropical Cyclones
Type
$loc['typeBook Chapter']
Year
2010
Publication
Global Perspectives on Tropical Cyclones: From Science to Mitigation
Abbreviated Journal
Volume
Issue
Pages
177-199
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Publisher
World Scientific
Place of Publication
Editor
Chan, JCL; Kepert, JD
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
376
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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
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Summary Language
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Series Editor
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ISSN
1793-5369
ISBN
Medium
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
670
Permanent link to this record
Author
Wu, Z. ; Huang, N.E. ; Chen, X.
Title
The Multi-Dimensional Ensemble Empirical Mode Decomposition Method
Type
$loc['typeJournal Article']
Year
2009
Publication
Advances in Adaptive Data Analysis
Abbreviated Journal
Adv. Adapt. Data Anal.
Volume
01
Issue
03
Pages
339-372
Keywords
Empirical mode decomposition (EMD) ; ensemble empirical mode decomposition (EEMD) ; minimal scale principle ; pseudo multi-dimensional ensemble empirical mode decomposition ; multi-dimensional ensemble empirical mode decomposition
Abstract
Address
Corporate Author
Thesis
Publisher
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Summary Language
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Series Editor
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ISSN
1793-5369
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
669
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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
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Corporate Author
Thesis
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Place of Publication
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Summary Language
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Series Editor
Series Title
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Edition
ISSN
1793-5369
ISBN
Medium
Area
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
671
Permanent link to this record