Alkalinity and Elemental Cycles in Present and Past Ocean: Insight from Geochemical Modeling 1 and Alkali and Alkaline Earth Metal Isotopes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F25%3A106355" target="_blank" >RIV/60460709:41330/25:106355 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/chapter/referencework/abs/pii/B9780323997621000371?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/chapter/referencework/abs/pii/B9780323997621000371?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/B978-0-323-99762-1.00037-1" target="_blank" >10.1016/B978-0-323-99762-1.00037-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Alkalinity and Elemental Cycles in Present and Past Ocean: Insight from Geochemical Modeling 1 and Alkali and Alkaline Earth Metal Isotopes

Popis výsledku v původním jazyce

This chapter provides an overview of near-surface geochemical processes operating on Earth, with special emphasis placed on (i) marine weathering such as alteration and dissolution of silicates, carbonates and terrigenous riverine particles in the ocean, complemented by (ii) reverse weathering reactions leading to marine authigenic clay formation, and the impact of these phenomena on ocean alkalinity budget and the chemical and isotope composition of seawater. Model simulations of the above processes provide estimates of the global marine fluxes of cation (Na+, K+, Mg2+, Ca2+), alkalinity, and dissolved silica (Si) into the ocean induced by silicate weathering and dissolution of terrigenous material in seawater. Additional constraints on silicate vs. carbonate weathering, oceanic/coastal CaCO3 cycling, and paleo-seawater reconstructions are provided via the isotope systems of alkali and alkaline earth metals (?88/86Sr, ?44/40Ca, ?26Mg, ?7Li), and emerging proxies such as ?41K, that are discussed within the context of marine weathering in the present and past ocean.

Název v anglickém jazyce

Alkalinity and Elemental Cycles in Present and Past Ocean: Insight from Geochemical Modeling 1 and Alkali and Alkaline Earth Metal Isotopes

Popis výsledku anglicky

This chapter provides an overview of near-surface geochemical processes operating on Earth, with special emphasis placed on (i) marine weathering such as alteration and dissolution of silicates, carbonates and terrigenous riverine particles in the ocean, complemented by (ii) reverse weathering reactions leading to marine authigenic clay formation, and the impact of these phenomena on ocean alkalinity budget and the chemical and isotope composition of seawater. Model simulations of the above processes provide estimates of the global marine fluxes of cation (Na+, K+, Mg2+, Ca2+), alkalinity, and dissolved silica (Si) into the ocean induced by silicate weathering and dissolution of terrigenous material in seawater. Additional constraints on silicate vs. carbonate weathering, oceanic/coastal CaCO3 cycling, and paleo-seawater reconstructions are provided via the isotope systems of alkali and alkaline earth metals (?88/86Sr, ?44/40Ca, ?26Mg, ?7Li), and emerging proxies such as ?41K, that are discussed within the context of marine weathering in the present and past ocean.

Druh

C - Kapitola v odborné knize

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Treatise on Geochemistry

ISBN

978-0-323-99763-8

Počet stran výsledku

54

Strana od-do

33-87

Počet stran knihy

55

Název nakladatele

Elsevier Science

Místo vydání

Německo

Kód UT WoS kapitoly

—