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2 edition of Decoupling of iron and phosphate in the global ocean found in the catalog.

Decoupling of iron and phosphate in the global ocean

Payal Parekh

Decoupling of iron and phosphate in the global ocean

by Payal Parekh

  • 222 Want to read
  • 16 Currently reading

Published by Massachusetts Institute of Technology, Woods Hole Oceanographic Institution in Cambridge, Mass, Woods Hole, Mass .
Written in

    Subjects:
  • Seawater -- Iron content -- Analysis.,
  • Seawater -- Analysis.,
  • Phosphate cycle (Biogeochemistry) -- Simulation methods.,
  • Nutrient cycles -- Simulation methods.,
  • Ocean circulation -- Simulation methods.

  • Edition Notes

    Statementby Payal Parekh.
    SeriesMIT/WHOI -- 2003-11., MIT/WHOI (series) -- 2003-11.
    ContributionsJoint Program in Oceanography/Applied Ocean Science and Engineering., Massachusetts Institute of Technology., Woods Hole Oceanographic Institution.
    The Physical Object
    Pagination139 p. :
    Number of Pages139
    ID Numbers
    Open LibraryOL16098083M

    Rose, A. L. and Waite, T. D. () Chemiluminescence of luminol in the presence of iron(II) and oxygen: oxidation mechanism and implications for its analytical use. Analytical Chemistry 73, Book Chapters. Garg, S., Rose, A. L. and Waite, T. D. (). Pathways contributing to the formation and decay of ferrous iron in sunlit natural. The highest stages of the stratigraphic range of the planktonic foraminiferal Rotalipora cushmani were investigated in a k.y.-long interval of the classical Tethyan Bottaccione section (Gubbio, Italy), the type locality of the C org- rich Bonarelli Level, which is the sedimentary expression of the worldwide latest Cenomanian oceanic anoxic event 2 (OAE 2).The disappearance of R. cushmani.

    Session 4 Global nutrient and carbon cycling Keynote - Susan Little Coupling and decoupling of Zn and Si in the global ocean Yingxu Wu The impact of upwelling on the DIC-temperature relationship in the surface global ocean Toby Tyrrell Comparison of latitudinal distributions of macronutrients, alkalinity and carbon. The homepage of IOPscience, home to more than years of leading scientific research journal content.

    Feb 14,  · Global Change Biology, 16, – Masek et al Potassium doping increases biochar carbon sequestration potential by 45%, facilitating decoupling of carbon sequestration from soil improvement Scientific Reports Vol 9, Article Pratt, K, Moran, D. Evaluating the cost-effectiveness of global biochar mitigation potential. Green Communications: Theoretical Fundamentals, Algorithms, and Applications - CRC Press Book Nowadays energy crisis and global warming problems are hanging over everyone’s head, urging much research work on energy saving.


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Decoupling of iron and phosphate in the global ocean by Payal Parekh Download PDF EPUB FB2

The model-proxy comparison of oxygen change suggests that a stratified Southern Ocean is required for reproducing the oxygen decrease in the deep Southern Ocean.

Iron fertilization and a global. Improved phosphate and AOU simulations are obtained when the amount of DOM is reduced and the deep ocean -Oâ/P ratio is increased in accord with recent observations of these properties. 43 refs. Schwertmannite is a ferric oxyhydroxysulfate mineral, which is common in acid sulfate systems.

Such systems contain varying concentrations of phosphate (PO43–)—an essential nutrient whose availability may be coupled to schwertmannite formation and fate. This study examines the effect of phosphate on schwertmannite stability under reducing ritacrossley.com by: 5.

For ocean fertilization to become a viable option to sequester CO 2, we need more extensive and targeted fieldwork and better mathematical models of ocean biogeochemical processes.

Models are needed both to interpret field observations and to make reliable predictions about the side effects of large-scale ritacrossley.com by: This iron–phosphorus–oxygen coupling produces a negative feedback, which may have kept atmospheric O 2 within equable levels throughout the Phanerozoic.

Thus, it is in the oceans that the role of phosphorus as limiting nutrient has the greatest repercussions for the global carbon and oxygen cycles.

The North Pacific Ocean is characterized with High-Nitrate, Low-Chlorophyll, where dissolved iron is a main limiting factor for plankton growth (Ridgwell, ).The marine export production data from Stations 50N (°01′E, 50°01′N) and SA (°E, 49°N) are taken from the papers of Onodera et al.

() and Asahi and Takahashi (), ritacrossley.com by: May 05,  · Numerical Simulation of Dissolved Iron Production and Transport in the Amur River and the Sea of Okhotsk our model can simulate dissolved iron production and transport in the Amur River basin and the Sea of Okhotsk.

Boyle EA () Decoupling of iron and phosphate in the global ocean. Global Biogeochem Cycles GB CrossRef Google Cited by: 2. The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and ritacrossley.com many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based compounds are usually solids at the typical ranges of temperature and pressure found on Earth.

The sedimentary source from the continental margins has a strong impact on open-ocean iron concentrations, particularly in the North Pacific. Plumes of elevated dissolved-iron concentrations develop at depth in the Southern Ocean, extending from source regions in. This book is dedicated to research on the application of phosphate rock sources to agriculture.

Journals and Meetings 6/29/ Global Phosphorus Dynamics - Environmental Science - Oxford Bibliographies. Optimal Design with Bounded Retardation for Problems with Non-separable Adjoints.

Authors; T. Slawig, Automated extension of fixed point pde solvers for optimal design with bounded retardation, in Constrained Optimization and Optimal Control for Partial Decoupling of iron and phosphate in the global ocean.

Glob. Biogeochem. Cycles Cited by: 6. Global Geoscience Transects [] History of Geophysics [] Lecture Notes on Coastal and Estuarine Studies [] Maurice Ewing Series [] Short Courses in Geology [] Water Resources Monograph Series [] Water Science and Application Series [].

Changes in iron supply to oceanic plankton are thought to have a significant effect on concentrations of atmospheric carbon dioxide by altering rates of carbon sequestration, a thCited by: The main phosphate producers are USA, China, and Morocco, and the largest world phosphate reserves exist in the West Sahara.

A debate about limited resources of phosphate and possible scarcity of phosphor to agriculture has been raging since the last decade (Cordell et al. ; Gilbert ; Van Vuuren et al. Some authors claim that Cited by: In the open oceans, observations have been limited to a purposeful release of phosphate and iron (Rees et al.

) and to various modelling studies that highlight the intimate and intricate relationships between the various essential elements and the forms in which they are present in the ocean (Dutkiewicz et al.

; Parekh et al. ).Cited by: Philip Boyd is Professor of Marine Biogeochemistry at the Institute of Marine and Antarctic Studies at the University of Tasmania. Philip's in-depth research interests range from ecology to biogeochemistry and include the joint development of decision support tools (such as for climate change, geoengineering) with economists and policy analysts.

Altabet, M.A., and R. Francois. Sedimentary nitrogen isotopic ratio as a recorder for surface ocean nitrate utilization. Global Biogeochemical Cycles 8(1): Cheap energy has allowed humans to extract increasingly greater amounts of phosphate rock in order to propel the ‘Green Revolution’ and support the explosion of world population over the last six decades.

The world’s reliance on phosphorus is an unappreciated aspect of the “Green Revolution,” a series of agricultural innovations that made it possible to feed the approximately They have more genes for phosphate uptake, regulation, and utilization at sites having μM phosphate.

In the ocean, phosphonates—a group of organic phosphorus compounds containing a stable carbon-phosphorus bond—are also important Cited by: News, analysis and comment from the Financial Times, the world's leading global business publication.

Silica in marine environments. Silicate, or silicic acid (H 4 SiO 4), is an important nutrient in the ocean. Unlike the other major nutrients such as phosphate, nitrate, or ammonium, which are needed by almost all marine plankton, silicate is an essential chemical requirement for very specific biota, including diatoms, radiolaria, silicoflagellates, and siliceous sponges.Oct 21,  · As the ecosystem is iron‐limited year round (Moore, Mills, et al., ), one approach for increasing summer productivity in future work may be to reduce iron requirements for small phytoplankton, for example using separate iron‐to‐phosphate ratio per species, or allowing for a dynamical stoichiometry (Tréguer et al., ).Cited by: 1.Professor Andrew Bowie is a Chemical Oceanographer.

His research investigates the biogeochemistry of trace elements in Southern Ocean and Antarctic sea ice environments, with projects addressing key research questions related to atmospheric dust deposition and solubilities, ocean iron fertilisation, physico-chemical speciation of trace elements and their isotopes, and the role of ocean.