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Author
Misra, V. ; Selman, C. ; Waite, A. J. ; Bastola, S. ; Mishra, A.
Title
Terrestrial and Ocean Climate of the 20th Century
Type
$loc['typeBook Chapter']
Year
2017
Publication
Florida's climate: Changes, variations, & impacts
Abbreviated Journal
Volume
Issue
Pages
485-509
Keywords
Seasonal cycle ; Diurnal variations ; Sea breeze ; ENSO ; Tropical cyclones ; Hurricanes ; AWP ; AMO ; PDO ; PIZA
Abstract
Address
Corporate Author
Thesis
Publisher
Florida Climate Institute
Place of Publication
Gainesville, FL
Editor
Chassignet, E. P.; Jones, J. W.; Misra, V.; Obeysekera, J.
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
849
Permanent link to this record
Author
Moeller, L
Title
Low-Frequency Variations of the Sea Breeze in Florida
Type
$loc['typeManuscript']
Year
2011
Publication
Abbreviated Journal
Volume
Issue
Pages
Keywords
Bermuda High ; Atlantic Warm Pool ; Sverdrup Vorticity Balance ; interannual variations
Abstract
Address
Department of Earth, Ocean, and Atmospheric Science
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
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
334
Permanent link to this record
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
Permanent link to this record
Author
Karmel, T.
Title
Using multiple methodologies to explore variation in rainfall events in the southeastern United States
Type
$loc['typeManuscript']
Year
2016
Publication
Abbreviated Journal
Volume
Issue
Pages
Keywords
Climate ; rainfall ; variation ; percentiles ; southeast ; united states ; assessment
Abstract
Address
Department of Earth, Ocean, and Atmospheric Sciences
Corporate Author
Thesis
$loc['Bachelor'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
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
81
Permanent link to this record
Author
Yu, P. ; Morey, S.L. ; O'Brien, J.J.
Title
A reduced-dynamics variational approach for the assimilation of altimeter data into eddy-resolving ocean models
Type
$loc['typeJournal Article']
Year
2009
Publication
Ocean Modelling
Abbreviated Journal
Ocean Modelling
Volume
27
Issue
3-4
Pages
215-229
Keywords
Ocean modeling ; Data assimilation ; Variational adjoint methods
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
1463-5003
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
400
Permanent link to this record
Author
Kanamitsu, M. ; Yulaeva, E. ; Li, H. ; Hong, S.-Y.
Title
Catalina Eddy as revealed by the historical downscaling of reanalysis
Type
$loc['typeJournal Article']
Year
2013
Publication
Asia-Pacific Journal of Atmospheric Sciences
Abbreviated Journal
Asia-Pacific J Atmos Sci
Volume
49
Issue
4
Pages
467-481
Keywords
Catalina Eddy ; vorticity ; diurnal variation ; sea breeze
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
1976-7633
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
194
Permanent link to this record
Author
Jia, Y. ; Chassignet, E.P.
Title
Seasonal variation of eddy shedding from the Kuroshio intrusion in the Luzon Strait
Type
$loc['typeJournal Article']
Year
2011
Publication
Journal of Oceanography
Abbreviated Journal
J Oceanogr
Volume
67
Issue
5
Pages
601-611
Keywords
Eddy shedding ; Kuroshio intrusion ; Luzon Strait ; Seasonal variation
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
0916-8370
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
289
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
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
260
Permanent link to this record
Author
Hilburn, K.A.
Title
Development of scatterometer-derived surface pressures for the Southern Ocean
Type
$loc['typeJournal Article']
Year
2003
Publication
Journal of Geophysical Research
Abbreviated Journal
J. Geophys. Res.
Volume
108
Issue
C7
Pages
Keywords
scatterometer ; surface pressure ; variational techniques ; Southern Ocean ; SeaWinds ; QuikSCAT
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
0148-0227
ISBN
Medium
Area
Expedition
Conference
Funding
NASA, NOAA, ONR
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
477
Permanent link to this record
Author
Misra, V. ; DiNapoli, S.
Title
The variability of the Southeast Asian summer monsoon
Type
$loc['typeJournal Article']
Year
2014
Publication
International Journal of Climatology
Abbreviated Journal
Int. J. Climatol.
Volume
34
Issue
3
Pages
893-901
Keywords
Monsoon onset ; Monsoon demise ; length of wet season ; interannual variation
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
0899-8418
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
139
Permanent link to this record