The relevance of deep chlorophyll maximum in the open Mediterranean Sea evaluated through 3D hydrodynamic-biogeochemical coupled simulations

2014 ◽  
Vol 281 ◽  
pp. 26-37 ◽  
Author(s):  
Diego Macías ◽  
Adolf Stips ◽  
Elisa Garcia-Gorriz
Keyword(s):  
Mediterranean Sea ◽  
Deep Chlorophyll Maximum ◽  
Chlorophyll Maximum

scholarly journals Deep chlorophyll maximum and nutricline in the Mediterranean Sea: emerging properties from a multi-platform assimilated biogeochemical model experiment

2021 ◽  
Author(s):  
Anna Teruzzi ◽  
Giorgio Bolzon ◽  
Laura Feudale ◽  
Gianpiero Cossarini
Keyword(s):  
Mediterranean Sea ◽  
Satellite Data ◽  
Positive Impact ◽  
Model Simulation ◽  
Eastern Mediterranean ◽  
Western Mediterranean ◽  
Biogeochemical Model ◽  
Deep Chlorophyll Maximum ◽  
Argo Data ◽  
Chlorophyll Maximum

Abstract. Data assimilation has had a positive impact on biogeochemical modelling in a number of oceanographic applications. The recent operational availability of data from BGC-Argo floats, which provide valuable insights into key vertical biogeochemical processes, can lead to further improvements in biogeochemical modelling through assimilation schemes that include float observations in addition to traditionally assimilated satellite data. In the present work, we demonstrate the feasibility of joint multi-platform assimilation in realistic biogeochemical applications by presenting the results of one-year simulations of Mediterranean Sea biogeochemistry. Different combinations of satellite chlorophyll data and BGC-Argo nitrate and chlorophyll data have been tested, and validation with respect to available independent and semi-independent (before assimilation) observations showed that assimilation of both satellite and float observations outperformed the assimilation of platforms considered individually. Moreover, the assimilation of BGC-Argo data impacted the vertical structure of nutrients and phytoplankton in terms of deep chlorophyll maximum depth and intensity and nutricline depth. The outcomes of the model simulation assimilating both satellite data and BGC-Argo data have been used to explore the basin-wide differences in vertical features associated with summer stratified conditions, describing a relatively high variability between the western and eastern Mediterranean, with thinner and shallower but intense deep chlorophyll maxima associated with steeper and narrower nutriclines in the western Mediterranean.

scholarly journals Deep chlorophyll maximum and nutricline in the Mediterranean Sea: emerging properties from a multi-platform assimilated biogeochemical model experiment

2021 ◽  
Vol 18 (23) ◽  
pp. 6147-6166
Author(s):  
Anna Teruzzi ◽  
Giorgio Bolzon ◽  
Laura Feudale ◽  
Gianpiero Cossarini
Keyword(s):  
Mediterranean Sea ◽  
Satellite Data ◽  
Model Simulation ◽  
Eastern Mediterranean ◽  
Western Mediterranean ◽  
Biogeochemical Model ◽  
Deep Chlorophyll Maximum ◽  
Argo Data ◽  
Chlorophyll Maximum ◽  
Consistent Picture

Abstract. Data assimilation has led to advancements in biogeochemical modelling and scientific understanding of the ocean. The recent operational availability of data from BGC-Argo (biogeochemical Argo) floats, which provide valuable insights into key vertical biogeochemical processes, stands to further improve biogeochemical modelling through assimilation schemes that include float observations in addition to traditionally assimilated satellite data. In the present work, we demonstrate the feasibility of joint multi-platform assimilation in realistic biogeochemical applications by presenting the results of 1-year simulations of Mediterranean Sea biogeochemistry. Different combinations of satellite chlorophyll data and BGC-Argo nitrate and chlorophyll data have been tested, and validation with respect to available independent non-assimilated and assimilated (before the assimilation) observations showed that assimilation of both satellite and float observations outperformed the assimilation of platforms considered individually. Moreover, the assimilation of BGC-Argo data impacted the vertical structure of nutrients and phytoplankton in terms of deep chlorophyll maximum depth, intensity, and nutricline depth. The outcomes of the model simulation assimilating both satellite data and BGC-Argo data provide a consistent picture of the basin-wide differences in vertical features associated with summer stratified conditions, describing a relatively high variability between the western and eastern Mediterranean, with thinner and shallower but intense deep chlorophyll maxima associated with steeper and narrower nutriclines in the western Mediterranean.

scholarly journals Dynamics of Two Picophytoplankton Groups in Mediterranean Sea: Analysis of the Deep Chlorophyll Maximum by a Stochastic Advection-Reaction-Diffusion Model

PLoS ONE ◽  
2013 ◽  
Vol 8 (6) ◽  
pp. e66765 ◽  
Author(s):  
Giovanni Denaro ◽  
Davide Valenti ◽  
Bernardo Spagnolo ◽  
Gualtiero Basilone ◽  
Salvatore Mazzola ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Diffusion Model ◽  
Reaction Diffusion ◽  
Deep Chlorophyll Maximum ◽  
Chlorophyll Maximum ◽  
Reaction Diffusion Model

Deep chlorophyll maximum (DCM) in the Red Sea

2021 ◽  
Vol 14 (3) ◽  
Author(s):  
Mohideen Wafar ◽  
Mohammad Ali Qurban ◽  
Zahid Nazeer ◽  
Karuppusamy Manikandan
Keyword(s):  
Red Sea ◽  
Deep Chlorophyll Maximum ◽  
Chlorophyll Maximum

The Deep Chlorophyll Maximum: Comparing Vertical Profiles of Chlorophyll a

1982 ◽  
Vol 39 (5) ◽  
pp. 791-803 ◽  
Author(s):  
John J. Cullen
Keyword(s):  
Chlorophyll A ◽  
Phytoplankton Biomass ◽  
Physiological Adaptation ◽  
Organic Carbon Content ◽  
Deep Chlorophyll Maximum ◽  
Vertical Profiles ◽  
In Vivo Fluorescence ◽  
Chlorophyll Maximum ◽  
Vertical Distributions

The relationship between chlorophyll a and phytoplankton biomass (organic carbon content) is highly variable as is the yield of in vivo fluorescence per unit chlorophyll. Thus, vertical profiles of chlorophyll or in vivo fluorescence must be interpreted with caution if their ecological significance is to be established. Although the variability of carbon-to-chlorophyll ratios and fluorescence yield is large, much of it can be anticipated, corrected for, and usefully interpreted. Vertical profiles from different regions of the sea are presented; each has a deep chlorophyll maximum, but the probable mechanisms of their formation and maintenance differ widely. Most vertical distributions of chlorophyll can be explained by the interaction between hydrography and growth, behavior, or physiological adaptation of phytoplankton with no special consideration of grazing by herbivores, even though vertical distributions of epizooplankton are not uniform. The interaction between vertical profiles of zooplankton and chlorophyll will be better understood when the relationships between chlorophyll and phytoplankton biomass in those profiles is determined.Key words: chlorophyll a, fluorescence, phytoplankton, vertical structure

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