Results 41 to 50 of about 230,886 (294)

Pelagic Iron Recycling in the Southern Ocean: Exploring the Contribution of Marine Animals

Frontiers in Marine Science, 2018
The availability of iron controls primary productivity in large areas of the Southern Ocean. Iron is largely supplied via atmospheric dust deposition, melting ice, the weathering of shelf sediments, upwelling, sediment resuspension, mixing (deep water ...
Lavenia Ratnarajah, Steve Nicol, Steve Nicol, Andrew R. Bowie, Andrew R. Bowie   +4 more
doaj   +1 more source

Global database of surface ocean particulate organic carbon export fluxes diagnosed from the ²³⁴Th technique [PDF]

Earth System Science Data, 2013
The oceanic biological carbon pump is an important factor in the global carbon cycle. Organic carbon is exported from the surface ocean mainly in the form of settling particles derived from plankton production in the upper layers of the ocean.
F. A. C. Le Moigne, S. A. Henson, R. J. Sanders, E. Madsen   +3 more
doaj   +1 more source

Assessing connectivity between an overlying aquifer and a coal seam gas resource using methane isotopes, dissolved organic carbon and tritium [PDF]

, 2015
Coal seam gas (CSG) production can have an impact on groundwater quality and quantity in adjacent or overlying aquifers. To assess this impact we need to determine the background groundwater chemistry and to map geological pathways of hydraulic ...
A Green-Saxena, A Vengosh, BE Fontenot, BFJ Kelly, C Duvert, CD Keeling, CD Keeling, DDR Owen, DE Pataki, DL Valentine, DT Maher, E Dafny, ECP Kinnon, EG Nisbet, EJ Dlugokencky, G Antler, JA Hakala, JF Barker, JW Roy, K Knittel, MJ Whiticar, NG Phillips, P Quay, RB Jackson, RE Fisher, S Cuna, S Qin, SG Osborn, SK Hamilton, SK Hamilton, SL Papendick, TA Moore   +31 more
core   +1 more source

Quantifying the Carbon Export and Sequestration Pathways of the Ocean's Biological Carbon Pump

Global Biogeochemical Cycles, 2022
Abstract The ocean's biological carbon pump transfers carbon from the surface ocean to the deep ocean by several distinct pathways, including gravitational settling of organic particles, mixing and advection of suspended organic carbon, and active transport by vertically migrating metazoans.
Michael Nowicki, Tim DeVries, David A. Siegel   +2 more
openaire   +1 more source

Observing biogeochemical cycles at global scales with profiling floats and gliders: prospects for a global array [PDF]

, 2009
Chemical and biological sensor technologies have advanced rapidly in the past five years. Sensors that require low power and operate for multiple years are now available for oxygen, nitrate, and a variety of bio-optical properties that serve as proxies ...
Berelson, W. M., Boss, E. S., Chase, Z., Claustre, H., Emerson, S. R., Gruber, N., Johnson, K. S., Körtzinger, Arne, Perry, M. J., Riser, S. C.   +9 more
core   +6 more sources

The Oceans’ Biological Carbon Pumps: Framework for a Research Observational Community Approach

Frontiers in Marine Science, 2021
A recent paradigm explains that the downward pumping of biogenic carbon in the ocean is performed by the combined action of six different biological carbon pumps (BCPs): the biological gravitational pump, the physically driven pumps (Mixed Layer Pump ...
Hervé Claustre, Louis Legendre, Philip W. Boyd, Marina Levy   +3 more
doaj   +1 more source

The Changing Biological Carbon Pump of the South Atlantic Ocean [PDF]

Global Biogeochemical Cycles
AbstractGlobal marine anthropogenic CO2 inventories have traditionally emphasized the North Atlantic's role in the carbon cycle, while Southern hemisphere processes are less understood. The South Subtropical Convergence (SSTC) in the South Atlantic, a juncture of distinct nutrient‐rich waters, offers a valuable study area for discerning the potential ...
Louise Delaigue, Olivier Sulpis, Gert-Jan Reichart, Matthew Paul Humphreys   +3 more
openaire   +3 more sources

The Cost of Reducing the North Atlantic Ocean Biological Carbon Pump [PDF]

Frontiers in Marine Science, 2017
To predict the impacts of climate change it is essential to understand how anthropogenic change alters the balance between atmosphere, ocean, and terrestrial reservoirs of carbon. It has been estimated that natural atmospheric concentrations of CO2 are almost 200 ppm lower than they would be without the transport of organic material produced in the ...
Barange, Manuel, Butenschön, Momme, Yool, Andrew, Beaumont, Nicola, Fernandes, Jose A., Martin, Adrian P., Allen, J. Icarus   +6 more
openaire   +4 more sources

Analytically tractable climate–carbon cycle feedbacks under 21st century anthropogenic forcing [PDF]

Earth System Dynamics, 2018
Changes to climate–carbon cycle feedbacks may significantly affect the Earth system's response to greenhouse gas emissions. These feedbacks are usually analysed from numerical output of complex and arguably opaque Earth system models.
S. J. Lade, S. J. Lade, S. J. Lade, J. F. Donges, J. F. Donges, I. Fetzer, I. Fetzer, J. M. Anderies, C. Beer, C. Beer, S. E. Cornell, T. Gasser, J. Norberg, K. Richardson, J. Rockström, W. Steffen, W. Steffen   +16 more
doaj   +1 more source

Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation [PDF]

, 2013
Global ocean circulation connects marine biogeochemical cycles through the long-range transport of nutrients and oxygen with the Southern Ocean (SO) acting as a water mass crossroads. The biological pump in the SO has been shown to play an important role
Keller, David, Oschlies, Andreas
core