Paleolimnological archives of environmental change in aquatic, terrestrial, and atmospheric systems

Lake sediments accumulate material derived from the atmosphere, the lake catchment, and the lake itself, and these materials can be used to infer the history of aquatic and terrestrial ecosystems, the climate system, and global biogeochemical cycling. Several case-studies will be presented to discus...

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Bibliographic Details
Main Authors: Fritz, S.C., Engstrom, D.R.
Format: Conference Proceeding
Language:English
Subjects:
540120 > Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540200 > Environment, Terrestrial-- (1990-)
540300 > Environment, Aquatic-- (1990-)
ACIDIFICATION
AQUATIC ECOSYSTEMS
ATMOSPHERIC CHEMISTRY
BIOGEOCHEMISTRY
CHEMISTRY
CLIMATIC CHANGE
ECOSYSTEMS
ELEMENTS
ENVIRONMENTAL SCIENCES
GEOCHEMISTRY
GLOBAL ASPECTS
LAKES
LIMNOLOGY
MERCURY
METALS
PALEOCLIMATOLOGY
PALEONTOLOGY
POLLUTION
SEDIMENTS
SURFACE WATERS 540320 > Environment, Aquatic-- Chemicals Monitoring & Transport-- (1990-)
TERRESTRIAL ECOSYSTEMS
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Summary:Lake sediments accumulate material derived from the atmosphere, the lake catchment, and the lake itself, and these materials can be used to infer the history of aquatic and terrestrial ecosystems, the climate system, and global biogeochemical cycling. Several case-studies will be presented to discuss the reconstruction of environmental variability from the paleolimnological record including studies of (1) Climate history: Closed-basin lakes are sensitive recorders of changes in the hydrologic budget and are used in and semi-arid regions to assess patterns of long- and short-term variability in moisture availability; (2) Biogeochemical cycling/pollution history: Basin-wide measurement of mercury accumulation in lake sediments is used to estimate modem and pre-industrial rates of mercury deposition and the contribution of global vs regional sources; and (3) Acidification history: Lake-pH is reconstructed from aquatic microfossils and correlated with changes in pollutant deposition and terrestrial vegetation to evaluate the extent, timing, and causes of acidification.
ISSN:0012-9623
2327-6096