Author: Jennifer Ayako GeorgePublisher:
ISBN:
Category : Marine phytoplankton
Languages : en
Pages : 96
Book Description
The Physical and Biological Mechanisms Controlling the Winter-spring Phytoplankton Bloom in Long Island Sound
Author: Jennifer Ayako GeorgePublisher:
ISBN:
Category : Marine phytoplankton
Languages : en
Pages : 96
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.
Canadian Journal of Fisheries and Aquatic Sciences
Author: 1998 Ocean Sciences Meeting
Author: Marine & Freshwater Research
Author: Response of Marine Ecosystems to Global Change
Author: Gabriel GorskyPublisher: Archives contemporaines
ISBN: 2847030298
Category : Global environmental change
Languages : en
Pages : 447
Book Description
Dynamics of Marine Ecosystems
Author: K. H. MannPublisher: John Wiley & Sons
ISBN: 1118687914
Category : Science
Languages : en
Pages : 512
Book Description
The new edition of this widely respected text providescomprehensive and up-to-date coverage of the effects ofbiological–physical interactions in the oceans from themicroscopic to the global scale. considers the influence of physical forcing on biologicalprocesses in a wide range of marine habitats including coastalestuaries, shelf-break fronts, major ocean gyres, coral reefs,coastal upwelling areas, and the equatorial upwelling system investigates recent significant developments in this rapidlyadvancing field includes new research suggesting that long-term variability inthe global atmospheric circulation affects the circulation of oceanbasins, which in turn brings about major changes in fish stocks.This discovery opens up the exciting possibility of being able topredict major changes in global fish stocks written in an accessible, lucid style, this textbook isessential reading for upper-level undergraduates and graduatestudents studying marine ecology and biological oceanography
Bulletin of the Atomic Scientists
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 104
Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Temporal Dynamics of an Estuary: San Francisco Bay
Author: James E. CloernPublisher: Springer
ISBN: 9061935385
Category : Science
Languages : en
Pages : 237
Book Description
Estuaries are highly dynamic systems subject to changes occurring over a spectrum of time scales ranging from very short periods (e. g. over a tidal cycle) to geologic time scales. The nature of an estuary reflects complex responses to many driving forces, each having a characteristic frequency (or frequencies) of change. For example, freshwater inflow to estuaries varies daily in response to short-term events such as storms, seasonally, and between years as a result of longer-term climatic variability. Other important components of weather, e. g. wind speed/ direction and daily insolation, also vary over time scales ranging from hours to years. Tidal amplitude changes continuously with dominant frequencies associated with the semi-diurnal cycle, the fortnightly neap-spring, and the semi-annual cycle. Temporal dynamics of these driving forces evoke responses in the form of changing (I) circulation patterns and mixing, (2) sediment composition and transport, (3) solute speciation and distribution, (4) composition and abundance of particulates, (5) biomass, species composition, and productivity of plant and animal communities, (6) rates of material exchange between the sediments, water column, and atmosphere, and (7) bioavailability of trace metals and other pollutants. The purpose of this book is to examine the temporal dynamics of these properties and processes in the San Francisco Bay estuary.
Toxic Dinoflagellate Blooms
Author: Dennis L. TaylorPublisher: North-Holland
ISBN:
Category : Science
Languages : en
Pages : 536
Book Description