Solute-specific pore water irrigation: Implications for chemical cycling in early diagenesis

Download

index.pdf

Date

2005-05-01

Author

Meile, C
Berg, P
Van Cappellen, P
Tuncay, Kağan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

95
views

0
downloads

In one-dimensional (1D) early diagenetic models, bioirrigation is typically represented by a nonlocal mass transfer or bioirrigation coefficient, alpha. Usually, all pore water species are assigned the same alpha. Here, we show that this assumption can lead to significant errors in estimates of bioirrigation intensities. Using a simplified early diagenetic reaction network, we compute the 3D concentration fields of major pore water species around a vertical burrow, as well as the solute fluxes across the burrow wall. From these results, corresponding 1D vertical alpha profiles are derived. The alpha profiles show pronounced differences from one solute to another. Dissolved O-2 systematically exhibits the highest alpha values, while fast oxygenation kinetics near the burrow wall result in near-zero alpha values for aqueous Fe2+. For nitrate, use of a species-averaged alpha profile may even lead to an erroneous prediction of the direction of the irrigation flux across the water-sediment interface. The large differences in alpha profiles reflect the variable effects of biogeochemical processes on pore water concentration fields of reactive solutes near the burrow wall. Even for inert solutes, however, determination of alpha can be ambiguous. Transient simulations mimicking the intrusion into the sediment of an inert tracer during an incubation experiment yield apparent mixing intensities that depend on the incubation time.

Subject Keywords

Oceanography

URI

https://hdl.handle.net/11511/38937

Journal

JOURNAL OF MARINE RESEARCH

DOI

https://doi.org/10.1357/0022240054307885

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

CP violation in polarized B -> pi l(+)l(-) and B -> pl(+)l(-) decays Erkol, G; Wagenaar, JW; Turan, Gürsevil (Springer Science and Business Media LLC, 2005-05-01) We study the decay rate and the CP violating asymmetry of the exclusive B -> pi l(+)l(-) and B -> rho l(+)l(-) decays in the case where one of the final leptons is polarized. We calculate the contributions coming from the individual polarization states in order to identify a so-called wrong sign decay, which is a decay with a given polarization, whose width and CP asymmetry are smaller as compared to the unpolarized one. The results are presented for electrons and tau leptons. We observe that in particular ...
Spherically symmetric solutions of Einstein plus non-polynomial gravities Deser, S.; Sarıoğlu, Bahtiyar Özgür; Tekin, Bayram (Springer Science and Business Media LLC, 2008-01-01) We obtain the static spherically symmetric solutions of a class of gravitational models whose additions to the General Relativity (GR) action forbid Ricci-flat, in particular, Schwarzschild geometries. These theories are selected to maintain the (first) derivative order of the Einstein equations in Schwarzschild gauge. Generically, the solutions exhibit both horizons and a singularity at the origin, except for one model that forbids spherical symmetry altogether. Extensions to arbitrary dimension with a cos...
Forward-backward asymmetry of Drell-Yan lepton pairs in pp collisions at root s=8 TeV Khachatryan, V.; et. al. (Springer Science and Business Media LLC, 2016-06-01) A measurement of the forward-backward asymmetry A(FB) of oppositely charged lepton pairs (mu mu and ee) produced via Z/gamma* boson exchange in pp collisions at root s = 8 TeV is presented. The data sample corresponds to an integrated luminosity of 19.7 fb(-1) collected with the CMS detector at the LHC. The measurement of AFB is performed for dilepton masses between 40 GeV and 2 TeV and for dilepton rapidity up to 5. The AFB measurements as a function of dilepton mass and rapidity are compared with the stan...
An axially symmetric scalar field and teleparallelism Korunur, M.; Salti, M.; Aydogdu, O. (Springer Science and Business Media LLC, 2007-03-01) An axially symmetric scalar field is considered in teleparallel gravity. We calculate, respectively, the tensor, the vector and the axial-vector parts of torsion and energy, momentum and angular momentum in the ASSF. We find the vector parts are in the radial and (e) over cap (theta) directions, the axial-vector, momentum and angular momentum vanish identically, but the energy distribution is different from zero. The vanishing axial-vector part of torsion gives us the result that there occurs no deviation i...
Shortcuts to spherically symmetric solutions: a cautionary note Deser, S; Franklin, J; Tekin, Bayram (IOP Publishing, 2004-11-21) Spherically symmetric solutions of generic gravitational models are optimally, and legitimately, obtained by expressing the action in terms of the surviving metric components. This shortcut is not to be overdone; however, a one-function ansatz invalidates it, as illustrated by the incorrect solutions of Wohlfarth (2004 Class. Quantum Grav. 21 1927).

Citation Formats

C. Meile, P. Berg, P. Van Cappellen, and K. Tuncay, “Solute-specific pore water irrigation: Implications for chemical cycling in early diagenesis,” JOURNAL OF MARINE RESEARCH, pp. 601–621, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38937.