Overview

Understanding the ebb and flow of materials on the earth's surface is vital to comprehending environmental change. We need to differentiate between those that represent a progression of natural events from those that might be human induced. The latter can be managed by changing policies; the former probably cannot. This volume presents what researchers know and do not know about the base (or natural) level of surficial fluxes and their dynamics. Leading experts in the field offer a historical perspective on geofluxes and discuss the cycles of materials on the earth's surface, from weathering processes to the movement of material through the river system and oceans to their deposition. The committee sets research directions in five areas: shallow-water studies, mapping, rates of change, sample dating, and—most critical—understanding whether human influence can exceed the natural variability in geoflux processes. This volume will be important reading for geophysical scientists, researchers, faculty, and students, as well as environmental policymakers. Table of Contents Front Matter Overview Pleistocene--Holocene Fluxes Are Not the Earth's Norm Surficial Weathering Fluxes and Their Geochemical Controls Global Chemical Weathering on Glacial Time Scales Origin and Variable Composition of Present Day Riverborne Materials Geomorphic/Tectonic Control of Sediment Discharge to the Ocean: The Importance of Small Mountainous Rivers Glacial to Modern Changes in Global River Fluxes Sediment Fluxes Along High-Latitude Glaciated Continental Margins: Northeast Canada and Eastern Greenland Late Quaternary Flux of Eolian Dust to the Pelagic Ocean Particle Fluxes in the Ocean and Implications for Sources and Preservation of Ocean Sediments Seafloor Diagenetic Fluxes Index

Full Product Details

Author:   National Research Council ,  Division on Earth and Life Studies ,  Commission on Geosciences, Environment and Resources ,  Board on Earth Sciences and Resources
Publisher:   National Academies Press
Imprint:   National Academies Press
Dimensions:   Width: 21.60cm , Height: 2.50cm , Length: 27.90cm
Weight:   0.885kg
ISBN:  

9780309047456

ISBN 10:   0309047455
Pages:   190
Publication Date:   01 February 1994
Audience:   Professional and scholarly ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   Out of stock  
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Table of Contents

1 Front Matter; 2 Overview; 3 Pleistocene--Holocene Fluxes Are Not the Earth's Norm; 4 Surficial Weathering Fluxes and Their Geochemical Controls; 5 Global Chemical Weathering on Glacial Time Scales; 6 Origin and Variable Composition of Present Day Riverborne Materials; 7 Geomorphic/Tectonic Control of Sediment Discharge to the Ocean: The Importance of Small Mountainous Rivers; 8 Glacial to Modern Changes in Global River Fluxes; 9 Sediment Fluxes Along High-Latitude Glaciated Continental Margins: Northeast Canada and Eastern Greenland; 10 Late Quaternary Flux of Eolian Dust to the Pelagic Ocean; 11 Particle Fluxes in the Ocean and Implications for Sources and Preservation of Ocean Sediments; 12 Seafloor Diagenetic Fluxes; 13 Index

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Panel on Global Surficial Geofluxes, Board on Earth Sciences and Resources, National Research Council

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