Modeling Geochemical and Biogeochemical Reactions in Subglacial Environments
نویسندگان
چکیده
منابع مشابه
Geochemical cycling of mercury in a deep, confined aquifer: Insights from biogeochemical reactive transport modeling
Total dissolved mercury concentrations (HgT) were measured in groundwaters collected along a flow path within a deep, confined aquifer (i.e., the Carrizo Sand) in southeastern Texas, USA, along with major solutes, pH, and redox sensitive parameters that include dissolved iron species [Fe(II), Fe(III)] and sulfide [S(-II)] concentrations. Mercury concentrations range from below detection (<0.43 ...
متن کاملThe Iron Biogeochemical Cycle Past and Present: A Geochemical Perspective
Our understanding of the complex aqueous chemistry of iron in natural systems has advanced significantly over recent years. Here we will highlight how new contributions from nanogeoscience combine with conventional aqueous geochemistry to provide a novel view of kinetics in the modern iron biogeochemical cycle, and the evolution of the iron cycle through geologic time. We start by considering t...
متن کاملRole of photochemical reactions in the biogeochemical cycling of detrital carbon in aquatic environments
Cover figure: Atomic force microscopic image of <0.1 µm filtered water of Lake Valkea-Kotinen sampled on 6 August 1996 displaying detrital and/or viral particles. Fifty µl of the filtered water was allowed to evaporate to dryness on a crystal of mica (diameter of 1 cm). The image was taken with a multi mode atomic force microscope by the courtesy of dr. S. J. 3 To my teachers 4 CONTENTS 1. List...
متن کاملSolute sources and geochemical processes in Subglacial Lake Whillans, West Antarctica
Subglacial Lake Whillans (SLW), West Antarctica, is an active component of the subglacial hydrological network located beneath 800 m of ice. The fill and drain behavior of SLW leads to long (years to decades) water residence times relative to those in mountain glacier systems. Here, we present the aqueous geochemistry of the SLW water column and pore waters from a 38-cm-long sediment core. Stab...
متن کاملModeling Low-Temperature Geochemical Processes
A model takes on the quality of theory when it abstracts from raw data the facts that its inventor perceives to be fundamental and controlling, and puts these into relation to each other in ways that were not understood before—thereby generating predictions of surprising new facts. Geochemical modeling has become a popular and useful tool for a wide number of applications from research on the f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Arctic, Antarctic, and Alpine Research
سال: 2008
ISSN: 1523-0430,1938-4246
DOI: 10.1657/1523-0430(06-075)[mitchell]2.0.co;2