#### DMCA

## Discussions Assimilation of ocean colour data into a Biochemical Flux Model of the Eastern (2006)

Citations: | 2 - 1 self |

### Citations

1137 |
Stochastic Processes and Filtering Theory.
- Jazwinski
- 1970
(Show Context)
Citation Context ...cast. The (sub-) optimal gain G of the EK filter can be obtained by formulating a variational problem to find the gain that minimizes the expected error between the analysis state and the true state (=-=Jazwinski, 1970-=-). The optimality of the Kalman gain is predicated on the knowledge of the forecast error covariance matrix P f . At time t k , it is given by Gk =P f k Ht k [H f kP k HT k +R]−1 , (8) where Hk denote... |

1046 | General circulation experiments with the primitive equations - Smagorinsky - 1963 |

696 |
Development of a turbulence closure model for geophysical fluid problems
- Mellor, Yamada
- 1982
(Show Context)
Citation Context ...ntal diffusion terms are evaluated using the Smagorinsky (1963) diffusion formulation while the vertical mixing coefficients are computed according to the Mellor-Yamada 2.5 turbulence closure scheme (=-=Mellor and Yamada, 1982-=-). The model has one open boundary located at 20 ◦ E as shown in Fig. 1 where open boundary conditions apply. The computational grid has a horizontal resolution of 1/10 ◦ ×1/10 ◦ and 25 sigma levels i... |

480 | A description of a threedimensional coastal ocean circulation model - Blumberg, Mellor - 1987 |

415 | Climatological atlas of the world ocean - Levitus - 1982 |

266 | Construction of correlation functions in two and three - Gaspari, Cohn - 1999 |

220 | A sequential ensemble Kalman filter for atmospheric data assimilation - Houtekamer, Mitchell |

196 |
Data assimilation in meteorology and oceanography
- Ghil, Malanotte-Rizzoli
- 1991
(Show Context)
Citation Context ...e estimates of the system state, as these methods allow for efficient handling of the model uncertainties while intermittently adjusting the model trajectory each time new observations are available (=-=Ghil and Malanotte-Rizzoli, 1991-=-). Taking into account (even partially) the model error is a key step for building a successful ecosystem assimilation system because of significant uncertainties in the current ecological models. For... |

193 | Optical modeling of the upper ocean in relation to its biogenous matter content - Morel - 1988 |

129 | User’s Guide for a Three-dimensional, Primitive Equation
- Mellor
- 1990
(Show Context)
Citation Context ...ion model. POM has been extensively described in the literature (Blumberg and Mellor, 1983, 1987; Horton et al., 1997; Lascaratos and Nittis, 1998) and is accompanied by a comprehensive User’s guide (=-=Mellor, 1998-=-). It has been previously used in the Mediterranean area by Drakopoulos and Lascaratos (1997) and Zavatarelli and Mellor (1995) and in the eastern Levantine basin by Lascaratos and Nittis (1998) and K... |

75 | An approximate Kalman filter for ocean data assimilation; an example with an idealized Gulf
- Fukumori, Malanotte-Rizzioli
(Show Context)
Citation Context ...lly implemented in several marine ecosystem data assimilation studies. The SEEK filter operates with low-rank matrices to avoid the prohibitive computational cost of the EK filter (Cane et al., 1996; =-=Fukumori and Malanotte-Rizzoli, 1995-=-), while only adjusting the model forecast in the directions of error growth. It further supports different degrees of simplifications in the evolution of its “correction directions” at a minimal loss... |

53 |
The European Regional Seas Ecosystem Model, a complex marine ecosystem model
- Baretta, Ebenhoh, et al.
- 1995
(Show Context)
Citation Context ...he contribution of the Turkish rivers with a total runoff of ∼5 km 3 /yr. 2.2 Biochemical Flux Model BFM is a generic highly complex model based on the European Regional Seas Ecosystem Model (ERSEM) (=-=Baretta et al., 1995-=-; Vichi et al., 2004). Although a detailed description of the BFM and its implementation in the Eastern Mediterranean can be found in a companion paper Petihakis et al. (2006), a brief presentation is... |

43 |
Parameter optimization and analysis of ecosystem models using simulated annealing: a case study at Station
- Matear
- 1995
(Show Context)
Citation Context ...et al., 1999; Lawson et al., 1996; Spiitz et al., 1998; Vallino, 2000), direct minimization methods (Fasham and Evans, 1995; Prunet et al., 1996), and Monte Carlo methods (Harmon and Challenor, 1996; =-=Matear, 1995-=-). Recently, focus shifted toward the use of Kalman filter based sequential assimilation techniques to directly compute estimates of the system state, as these methods allow for efficient handling of ... |

35 | Testing a marine ecosystem model: Sensitivity analysis and parameter optimization - Fennel, Losch, et al. - 2001 |

34 |
The use of optimization techniques to model marine ecosystem dynamics at the JGOFS station at 478N 208W
- Fasham, Evans
- 1995
(Show Context)
Citation Context ...model simulations and data, e.g. the adjoint method (Fennel et al., 2001; Friedrichs, 2001; Gunson et al., 1999; Lawson et al., 1996; Spiitz et al., 1998; Vallino, 2000), direct minimization methods (=-=Fasham and Evans, 1995-=-; Prunet et al., 1996), and Monte Carlo methods (Harmon and Challenor, 1996; Matear, 1995). Recently, focus shifted toward the use of Kalman filter based sequential assimilation techniques to directly... |

33 |
A Markov chain Monte Carlo method for estimation and assimilation into models
- Harmon, Challenor
- 1997
(Show Context)
Citation Context ...1; Friedrichs, 2001; Gunson et al., 1999; Lawson et al., 1996; Spiitz et al., 1998; Vallino, 2000), direct minimization methods (Fasham and Evans, 1995; Prunet et al., 1996), and Monte Carlo methods (=-=Harmon and Challenor, 1996-=-; Matear, 1995). Recently, focus shifted toward the use of Kalman filter based sequential assimilation techniques to directly compute estimates of the system state, as these methods allow for efficien... |

32 | Algal biomass and sea surface temperature in the Mediterranean Basin. Intercomparison of data from various satellite sensors, and implications for primary production estimates - Bricaud, Bosc, et al. |

32 |
Assimilation of surface data in a one-dimensional physical–biogeochemical model of the surface ocean. 2. Adjusting a simple trophic model to chlorophyll, temperature, nitrate, and pCO2 data. Global Biogeochem
- Prunet, Minster, et al.
- 1996
(Show Context)
Citation Context ...ta, e.g. the adjoint method (Fennel et al., 2001; Friedrichs, 2001; Gunson et al., 1999; Lawson et al., 1996; Spiitz et al., 1998; Vallino, 2000), direct minimization methods (Fasham and Evans, 1995; =-=Prunet et al., 1996-=-), and Monte Carlo methods (Harmon and Challenor, 1996; Matear, 1995). Recently, focus shifted toward the use of Kalman filter based sequential assimilation techniques to directly compute estimates of... |

30 |
Data assimilation and a pelagic ecosystem model: parameterization using time series observations
- Spitz, Moisan, et al.
- 1998
(Show Context)
Citation Context ... seek for the unknown parameters that minimize the misfit between model simulations and data, e.g. the adjoint method (Fennel et al., 2001; Friedrichs, 2001; Gunson et al., 1999; Lawson et al., 1996; =-=Spiitz et al., 1998-=-; Vallino, 2000), direct minimization methods (Fasham and Evans, 1995; Prunet et al., 1996), and Monte Carlo methods (Harmon and Challenor, 1996; Matear, 1995). Recently, focus shifted toward the use ... |

27 | Improving marine ecosystem models: use of data assimilation and mesocosm experiments - Vallino - 2000 |

26 | A simplified reduced order Kalman filtering and application to altimetric data assimilation - Hoteit, Pham, et al. |

23 |
Diagnostic and prognostic numerical circulation studies of the South Atlantic Bight. 1. Geophys
- Blumberg, Mellor
- 1983
(Show Context)
Citation Context ...el (BFM). 2.1 The physical model The hydrodynamic model is based on the Princeton Ocean Model (POM), a primitive equation, 3-D circulation model. POM has been extensively described in the literature (=-=Blumberg and Mellor, 1983-=-, 1987; Horton et al., 1997; Lascaratos and Nittis, 1998) and is accompanied by a comprehensive User’s guide (Mellor, 1998). It has been previously used in the Mediterranean area by Drakopoulos and La... |

23 |
Nutrient Dynamics and New Production in a Warm-Core Eddy from the Eastern Mediterranean-Sea
- Krom, Brenner, et al.
- 1992
(Show Context)
Citation Context ...in an oligotrophic gradient toward the east. The observed oligotrophy is thought to be due to low phosphorus concentrations (decreasing from west to east) limiting phytoplankton and bacterial growth (=-=Krom et al., 1992-=-). The state of the art in forecasting the Mediterranean Sea circulation is an operational system based on physical components. While 1570s5 10 15 20 25 5 10 15 20 25 these systems exist for ocean phy... |

20 | An Ensemble Kalman Filter with a complex marine ecosystem model: hindcasting phytoplankton - Allen, Eknes, et al. - 2003 |

19 |
Singular evolutive Kalman filter with EOF initialization for data assimilation in oceanography
- Pham, Verron, et al.
- 1997
(Show Context)
Citation Context ... be the most appropriate. 4.4 The correction directions A common strategy to determine the filter’s correction directions is to use model statistics as an approximation of the true system statistics (=-=Pham et al., 1997-=-). Then by appropriate sampling of model state vectors one can obtain an approximation of the fil1584s5 10 15 20 25 5 10 15 20 25 ter’s covariance matrix through the dominant empirical orthogonal func... |

19 |
Local Algorithms Using Seawifs Data for the Retrieval of
- Tassan
- 1994
(Show Context)
Citation Context ...ld information on water-quality parameters such as phytoplankton pigments (more precisely chlorophyll a and phaeophytin a), suspended sediment, and yellow substance (gelbstoff) in the euphotic layer (=-=Tassan, 1994-=-). Chlorophyll-a is one of the key parameters of the ecosystem model used here (Biochemical Flux Model–BFM) and therefore the appropriate use of satellite data may guide the modeling and forecasting p... |

17 | Assimilation of JGOFS EqPac and SeaWiFS data into a marine ecosystem model of the central equatorial Pacific Ocean - Friedrichs - 2002 |

17 |
An oceanographic nowcast/forecast system for the Red Sea
- Clifford, Horton, et al.
- 1997
(Show Context)
Citation Context ...The hydrodynamic model is based on the Princeton Ocean Model (POM), a primitive equation, 3-D circulation model. POM has been extensively described in the literature (Blumberg and Mellor, 1983, 1987; =-=Horton et al., 1997-=-; Lascaratos and Nittis, 1998) and is accompanied by a comprehensive User’s guide (Mellor, 1998). It has been previously used in the Mediterranean area by Drakopoulos and Lascaratos (1997) and Zavatar... |

15 | Physical and biological modeling in the Gulf Stream region. I. Data assimilation methodology. Deep-Sea Res - Anderson, Robinson, et al. - 2000 |

14 | Evolutivity of the reduced state space and data assimilation schemes based on the kalman filter - Hoteit, Pham |

12 | Assimilation of altimetric observations in a primitive equation model of the Gulf Stream using a Singular Extended Kalman - Brasseur, Ballabrera, et al. - 1999 |

9 |
2001. SeaDAS, a Data Analysis System for Ocean-Color Satellite Sensors
- Baith, Lindsay, et al.
(Show Context)
Citation Context ... more than 20 GB of data which were acquired from NASA Goddard through the NASA Ocean Colour Web and ftp service (Feldman and McClain, 2004). The data were processed by the NASA SeaDAS software v4.0 (=-=Baith et al., 2001-=-) from the original spectral data using default values from the SeaWiFS level 2 product processing chain which includes atmospheric correction, georeferencing and chlorophyll-a retrieval OC4v4 (O’Reil... |

9 | Modeling the Mediterranean Sea: climatological forcing - Drakopoulos, Lascaratos - 1997 |

9 | Modelling the Spatial and Temporal Variability of the Cretan Sea Ecosystem - Petihakis, Triantafyllou, et al. |

8 | I.: A singular evolutive extended Kalman filter to assimilate real in situ data in a 1-D marine ecosystem model, Ann - Hoteit, Triantafyllou, et al. - 2003 |

8 | 2003: A singular evolutive interpolated Kalman filter for efficient data assimilation in a 3-d complex physical biogeochemical model of the Cretan Sea - Triantafyllou, Hoteit, et al. |

7 | 2003. Assimilation of ocean color data into a biochemical model of the North Atlantic: Part I Data assimilation experiments - NATVIK, EVENSEN |

7 | Ecosystem modeling and data assimilation of physical-biogeochemical processes in shelf and regional areas of the Mediterranean - Triantafyllou, Hoteit, et al. - 2005 |

6 |
Efficient data assimilation into a complex, 3-D physical-biogeochemical model using partially-local Kalman filters
- Hoteit, Triantafyllou, et al.
- 2005
(Show Context)
Citation Context ...ter with independent chlorophyll data. Triantafyllou et al. (2003) implemented the interpolated version of the SEEK filter in a three dimensional ecosystem model of the Cretan Sea. In the same area, (=-=Hoteit et al., 2005-=-) successfully tested the SEEK filter with semi-evolutive correction directions composed of global and local EOFs. The reader is referred to Triantafyllou et al. (2005) for a review on the implementat... |

5 | An eddy resolving model of the Aegean and Levantine basins for the Mediterranean Forecasting System Pilot Project (MFSPP): Implementation and climatological runs, Ann - Korres, Lascaratos |

5 | The Eastern Mediterranean, in: The Biogeochemistry of Marine Systems, edited by - Krom, Groom, et al. - 2003 |

4 | Towards a data assimilation system for the Cretan sea ecosystem using a simplified Kalman - Hoteit, Triantafyllou, et al. |

2 | et al.: A singular evolutive extended Kalman filter to assimilate ocean color data in a coupled physical-biochemical model of the North Atlantic ocean - Carmillet, Brankart, et al. |

2 | Characteristics of deep chlorophill maximum in the Northeastern Mediterranean with respect to environmental conditions - Ediger, Yilmaz - 1996 |

2 |
A high-resolution three-dimensional study of intermediate water formation in the Levantine
- Lascaratos, Nittis
- 1998
(Show Context)
Citation Context ...l is based on the Princeton Ocean Model (POM), a primitive equation, 3-D circulation model. POM has been extensively described in the literature (Blumberg and Mellor, 1983, 1987; Horton et al., 1997; =-=Lascaratos and Nittis, 1998-=-) and is accompanied by a comprehensive User’s guide (Mellor, 1998). It has been previously used in the Mediterranean area by Drakopoulos and Lascaratos (1997) and Zavatarelli and Mellor (1995) and in... |

2 |
H.: Time series sampling and data assimilation in a very simple ecosystem model, Deep-Sea Res
- Lawson, Hofmann, et al.
- 1996
(Show Context)
Citation Context ... techniques basically seek for the unknown parameters that minimize the misfit between model simulations and data, e.g. the adjoint method (Fennel et al., 2001; Friedrichs, 2001; Gunson et al., 1999; =-=Lawson et al., 1996-=-; Spiitz et al., 1998; Vallino, 2000), direct minimization methods (Fasham and Evans, 1995; Prunet et al., 1996), and Monte Carlo methods (Harmon and Challenor, 1996; Matear, 1995). Recently, focus sh... |

2 | et al.: Transport and distribution of nutrients and chlorophyll-a by mesoscale eddies - Saliho˘glu, Saydam, et al. - 1990 |

2 | et al.: Carbon flow in the planktonic food web along a gradient of oligotrophy - Siokou-Frangou, Bianchi, et al. |

1 |
et al.: Mapping tropical Pacific sea level: data assimilation via a reduced state Kalman filter
- Cane, Kaplan, et al.
- 1996
(Show Context)
Citation Context ...pular and successfully implemented in several marine ecosystem data assimilation studies. The SEEK filter operates with low-rank matrices to avoid the prohibitive computational cost of the EK filter (=-=Cane et al., 1996-=-; Fukumori and Malanotte-Rizzoli, 1995), while only adjusting the model forecast in the directions of error growth. It further supports different degrees of simplifications in the evolution of its “co... |

1 | et al.: Phytoplankton size-based dynamics in the Aegean - Ignatiades, Psarra, et al. |

1 |
et al.: Algorithm Updates for the Fourth SeaWiFS Data Reprocessing, in: SeaWiFS Postlaunch Technical Report Series, edited by
- Patt, Barnes, et al.
- 2003
(Show Context)
Citation Context ...al spectral data using default values from the SeaWiFS level 2 product processing chain which includes atmospheric correction, georeferencing and chlorophyll-a retrieval OC4v4 (O’Reilly et al., 2000; =-=Patt et al., 2003-=-). The OC4v4 algorithm implements the following fourth order polynomial equation to calculate chlorophyll-a estimates log10 (chl − a)=0.366 − 3.067R4S + 1.930R 2 + 0.649R3 − 1.532R4 4S 4S 4S where R i... |

1 | Eastern Mediterranean Biochemical Flux Model, Simulations of the pelagic system - Petihakis, Triantafyllou, et al. - 2006 |

1 |
Remote Sensing of Primary
- Platt, Sathyendranath, et al.
- 1995
(Show Context)
Citation Context ...on from the observations to optimally initialize the forecast. One of the only synoptic data sources on the state of coastal and pelagic ecosystems comes from “ocean colour” satellite remote sensing (=-=Platt et al., 1995-=-). Since the launch of the Coastal Zone Colour Scanner on the Nimbus 7 satellite in 1978, satellite borne ocean colour sensors have become the standard tool for determining distributions of phytoplank... |

1 |
et al.: European Regional Seas Ecosystem Model III., Review of the biogeochemical equations
- Vichi, Baretta, et al.
- 2004
(Show Context)
Citation Context ... Turkish rivers with a total runoff of ∼5 km 3 /yr. 2.2 Biochemical Flux Model BFM is a generic highly complex model based on the European Regional Seas Ecosystem Model (ERSEM) (Baretta et al., 1995; =-=Vichi et al., 2004-=-). Although a detailed description of the BFM and its implementation in the Eastern Mediterranean can be found in a companion paper Petihakis et al. (2006), a brief presentation is considered necessar... |