Author: John Christopher Paul HemmingsPublisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
Quantitative modelling of spatial variability in the north atlantic spring phytoplankton bloom
Author: John Christopher Paul HemmingsPublisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
Wind-induced Modulation of Spring Phytoplankton Blooms in the North Atlantic Derived from Satellite Observations
Author: Rei UeyamaUnraveling Mechanisms Underlying Annual Plankton Blooms in the North Atlantic and Their Implications for Biogenic Aerosol Properties and Cloud Formation
Author: Kristina Dee Anne MojicaPublisher: Frontiers Media SA
ISBN: 288971652X
Category : Science
Languages : en
Pages : 314
Book Description
Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 712
Book Description
Phytoplankton Dynamics Studying Using Observation and Bio-physical Modeling
Author: Yi XuPublisher:
ISBN:
Category : Chlorophyll
Languages : en
Pages : 101
Book Description
Continental shelf phytoplankton bloom dynamics are associated with meteorological, oceanographic and coastal forcing mechanisms. Mixing related to stratification and de-stratification is a key process of the physical environment that can control the timing and magnitude of blooms. Using data from satellite, coastal ocean observatory and bio-physical model, this study investigated the seasonal and decadal variability of chlorophyll in the Mid-Atlantic Bight and how different forcing mechanisms affect the phytoplankton bloom. The temporal and spatial distribution of chlorophyll a in the MAB was quantified using satellite data collected by the Sea-viewing Wide Field of view Sensor (SeaWiFS). The MAB undergoes a fall-winter bloom in the middle-outer shelf region and spring bloom in the shelf-break region. The interannual variability of bloom magnitude is associated with wind-induced mixing. Mixing has been recognized as having an important role in influencing underwater light and nutrient budgets and thus regulating phytoplankton bloom. The ratio of light over mixed layer depth (MLD) was used to determine the trade-off effects of mixing on phytoplankton bloom activity. We find that a critical light value around 60 (W m-2) for the shelf region and 150 (W m-2) for the shelf-break front region in promoting maximum phytoplankton biomass and there is a predictable linear regression relationship between the critical light value and depth. The bio-physical model identified the wind-induced mixing, net heat flux and river run-off are the most important factors influencing water column stability. Sensitivity studies showed that the timing of the destratification and initiation of fall bloom was closely related to the wind forcing. The river's role in bringing buoyancy was significant in increasing phytoplankton bloom. The decadal declines in the seasonal satellite estimates of chlorophyll a concentrations have been observed in the fall and winter in the MAB and are hypothesized to reflect shifts in the Atlantic Multidecadal Oscillation (AMO) that alters wind stress, river discharge, and net heat flux. This work prototypes the integration of observation and modeling in a coastal environment and demonstrates the use of 3D coupled physical-biological model forced with realistic atmospheric forcing to study the phytoplankton dynamics in the MAB.
The Norwegian Sea Ecosystem
Author: Hein Rune SkjoldalPublisher: Fagbokforlaget
ISBN:
Category : Architecture
Languages : en
Pages : 568
Book Description
'The Norwegian Sea Ecosystem' elucidates the interaction between the different ecological compartments of the area, with special emphasis on the most important pelagic fish stocks. It deals with mechanisms for ecosystem variability and discusses the challenge of an ecosystem approach to managing the area.
Using Temporal Variability in Optical Measurements to Quantify Phytoplankton Production, Particle Size, and Aggregation During the North Atlantic Spring Bloom
Author: Nathan BriggsPublisher:
ISBN:
Category : Algal blooms
Languages : en
Pages : 0
Book Description
A Mechanistic Approach to Plankton Ecology
Author: Thomas KiørboePublisher: Princeton University Press
ISBN: 0691190313
Category : Nature
Languages : en
Pages : 228
Book Description
The three main missions of any organism--growing, reproducing, and surviving--depend on encounters with food and mates, and on avoiding encounters with predators. Through natural selection, the behavior and ecology of plankton organisms have evolved to optimize these tasks. This book offers a mechanistic approach to the study of ocean ecology by exploring biological interactions in plankton at the individual level. The book focuses on encounter mechanisms, since the pace of life in the ocean intimately relates to the rate at which encounters happen. Thomas Kiørboe examines the life and interactions of plankton organisms with the larger aim of understanding marine pelagic food webs. He looks at plankton ecology and behavior in the context of the organisms' immediate physical and chemical habitats. He shows that the nutrient uptake, feeding rates, motility patterns, signal transmissions, and perception of plankton are all constrained by nonintuitive interactions between organism biology and small-scale physical and chemical characteristics of the three-dimensional fluid environment. Most of the book's chapters consist of a theoretical introduction followed by examples of how the theory might be applied to real-world problems. In the final chapters, mechanistic insights of individual-level processes help to describe broader population dynamics and pelagic food web structure and function.
The Impact of Desert Dust Across the Mediterranean
Author: Stefano GuerzoniPublisher: Springer Science & Business Media
ISBN: 0792342941
Category : Science
Languages : en
Pages : 415
Book Description
The atmosphere is an important pathway for the transport of continentally-derived material to the oceans. In this respect the Mediterranean Sea is of special importance because its atmosphere receives inputs of anthropogenic aerosols from the north and desert- derived Saharan dusts from the south. The dusts, much of which is transported in the form of seasonal `pulses', have important effects on climate, marine chemistry and sedimentation in the Mediterranean Sea. This volume brings together reviews and specific-topic papers on the following aspects of Saharan dust transport to the Mediterranean Sea: (i) the modelling of Saharan dust transport, (ii) the chemistry and mineralogy of the dusts and their effect on precipitation, (iii) the contribution of the dusts to marine sedimentation, (iv) the aerobiology of the dusts, and (v) climatic implications of Saharan dust transport. The volume is aimed at students and researchers with an interest in the climate, biogeochemistry and geology of the Mediterranean Sea.
British National Bibliography for Report Literature
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 784
Book Description