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Author Smith, S. R.
Title Progress of the Shipboard Automated Meteorological and Oceanographic System (SAMOS) initiative Type $loc['typeReport']
Year 2006 Publication Abbreviated Journal
Volume Issue Pages cdrom
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Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Climate Observation Program 4th Annual System Review, NOAA, Silver Spring, MD, USA
Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 934
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Author Smith, S. R.
Title A Comparison of SAMOS and Bridge Observations on Research Vessels Type $loc['typeConference Article']
Year 2006 Publication 1st Joint GOSUD SAMOS Workshop, NOAA, Boulder, CO, USA Abbreviated Journal
Volume Issue Pages
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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 NOAA
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 936
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Author Smith, S. R.
Title Collaboration between Shipboard Oceanic and Atmospheric Data Programs Type $loc['typeMagazine Article']
Year 2006 Publication EOS Abbreviated Journal
Volume 87
Issue Pages 463,466
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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 NOAA
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 938
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Author Smith, S. R. ; Bentamy, A. ; Clayson, C. A.
Title SEAFLUX 3rd Workshop Type $loc['typeMagazine Article']
Year 2006 Publication Flux News Abbreviated Journal
Volume Issue 2
Pages
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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 @ mfield @
Serial 916
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Author Smith, S. R. ; Bourassa, M. A. ; Rolph, J. ; Hughes, P.
Title The FSU fluxes for the Atlantic and Indian Oceans Type $loc['typeReport']
Year 2006 Publication Abbreviated Journal
Volume Issue Pages cdrom
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Climate Observation Program 4th Annual System Review, NOAA, Silver Spring, MD, USA
Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Funding NOAA, NSF
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 933
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Author Smith, S. R. ; Keeley, R. ; Delcroix, T.
Title Report of the 1st Joint GOSUD/SAMOS Workshop Type $loc['typeReport']
Year 2006 Publication Abbreviated Journal
Volume Issue Pages 63
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Corporate Author Thesis
Publisher UCAR Joint Office for Science Support
Place of Publication Boulder, CO, USA
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 NOAA
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 941
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Author Taylor, J. P.
Title Comparison of ECMWF and Quikscat-Derived Surface Pressure Gradients Type $loc['typeManuscript']
Year 2006 Publication Abbreviated Journal
Volume Issue Pages
Keywords Flagging Techniques
Abstract A technique based solely on QuikSCAT data is developed for determining suspect differences between QSCAT and ECMWF pressure gradients. Pressure fields are computed from scatterometer winds using a variational method that applies a gradient wind conversion. Kinematic analysis of the satellite wind field is performed in order to determine which parameters are physically related to the suspect pressure gradients. It is discovered that the likelihood of these suspect occurrences has the greatest dependence on relative vorticity, total deformation, and the curvature Rossby number. A broad range of these values is tested and a single assessment criterion is derived based upon the value of several skill scores. Overall, the assessment criterion is able to correctly identify the majority of suspect pressure gradients; yet considerable over-flagging does occur in many instances. However, the over-flagging is not random: the false alarms are tightly clustered around the suspect areas, resulting in flagged regions that are too large. Identification of the location of suspect areas in pressure products should be useful to forecasters.
Address Department of Meteorology
Corporate Author Thesis $loc['Master's thesis']
Publisher Florida State University
Place of Publication Tallahassee, FL
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 NASA, OVWST, SeaWinds
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 619
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Author Yu, P
Title Development of New Techniques for Assimilating Satellite Altimetry Data into Ocean Models Type $loc['typeManuscript']
Year 2006 Publication Abbreviated Journal
Volume Issue Pages
Keywords Data Assimilation, Reduced Space, First Baroclinic Mode, Ocean Models, Vertical Normal Mode Decomposition, Variational
Abstract State of the art fully three-dimensional ocean models are very computationally expensive and their adjoints are even more resource intensive. However, many features of interest are approximated by the first baroclinic mode over much of the ocean, especially in the lower and mid latitude regions. Based on this dynamical feature, a new type of data assimilation scheme to assimilate sea surface height (SSH) data, a reduced-space adjoint technique, is developed and implemented with a three-dimensional model using vertical normal mode decomposition. The technique is tested with the Navy Coastal Ocean Model (NCOM) configured to simulate the Gulf of Mexico. The assimilation procedure works by minimizing the cost function, which generalizes the misfit between the observations and their counterpart model variables. The “forward” model is integrated for the period during which the data are assimilated. Vertical normal mode decomposition retrieves the first baroclinic mode, and the data misfit between the model outputs and observations is calculated. Adjoint equations based on a one-active-layer reduced gravity model, which approximates the first baroclinic mode, are integrated backward in time to get the gradient of the cost function with respect to the control variables (velocity and SSH of the first baroclinic mode). The gradient is input to an optimization algorithm (the limited memory Broyden-Fletcher-Goldfarb-Shanno (BFGS) method is used for the cases presented here) to determine the new first baroclinic mode velocity and SSH fields, which are used to update the forward model variables at the initial time. Two main issues in the area of ocean data assimilation are addressed: 1. How can information provided only at the sea surface be transferred dynamically into deep layers? 2. How can information provided only locally, in limited oceanic regions, be horizontally transferred to ocean areas far away from the data-dense regions, but dynamically connected to it? The first problem is solved by the use of vertical normal mode decomposition, through which the vertical dependence of model variables is obtained. Analyses show that the first baroclinic mode SSH represents the full SSH field very closely in the model test domain, with a correlation of 93% in one of the experiments. One common way to solve the second issue is to lengthen the assimilation window in order to allow the dynamic model to propagate information to the data-sparse regions. However, this dramatically increases the computational cost, since many oceanic features move very slowly. An alternative solution to this is developed using a mapping method based on complex empirical orthogonal functions (EOF), which utilizes data from a much longer period than the assimilation cycle and deals with the information in space and time simultaneously. This method is applied to map satellite altimeter data from the ground track observation locations and times onto a regular spatial and temporal grid. Three different experiments are designed for testing the assimilation technique: two experiments assimilate SSH data produced from a model run to evaluate the method, and in the last experiment the technique is applied to TOPEX/Poseidon and Jason-1 altimeter data. The assimilation procedure converges in all experiments and reduces the error in the model fields. Since the adjoint, or “backward”, model is two-dimensional, the method is much more computationally efficient than if it were to use a fully three-dimensional backward model.
Address Department of Oceanography
Corporate Author Thesis $loc['Ph.D. thesis']
Publisher Florida State University
Place of Publication Tallahassee, FL
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 NSF, ONR, NASA
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 589
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Author Yu, P. ; Morey, S. L. ; O'Brien, J. J.
Title Development of new techniques for assimilating satellite altimetry data into ocean models Type $loc['typeReport']
Year 2006 Publication Abbreviated Journal
Volume Issue Pages
Keywords
Abstract
Address
Corporate Author Thesis
Publisher World Meteorological Organization
Place of Publication Geneva, Switzerland
Editor Cote, J.
Language Summary Language Original Title
Series Editor Series Title Research Activities in Atmospheric and Ocean Modeling, Report No. 36
Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Funding Approved $loc['no']
Call Number COAPS @ mfield @
Serial 927
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Author Zamudio, L. ; Hurlburt, H.E. ; Metzger, E.J. ; Morey, S.L. ; O'Brien, J.J. ; Tilburg, C. ; Zavala-Hidalgo, J.
Title Interannual variability of Tehuantepec eddies Type $loc['typeJournal Article']
Year 2006 Publication Journal of Geophysical Research Abbreviated Journal J. Geophys. Res.
Volume 111
Issue C5
Pages
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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 0148-0227
ISBN Medium
Area Expedition Conference
Funding ONR
Approved $loc['no']
Call Number COAPS @ mfield @
Serial 438
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