SULJE VALIKKO

avaa valikko

National Academies Press
Sivumäärä: 190 sivua
Asu: Kovakantinen kirja
Julkaisuvuosi: 1994, 01.02.1994 (lisätietoa)
Kieli: Englanti
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

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Material Fluxes on the Surface of the Earthzoom
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ISBN:
9780309047456
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