Heavy metals in Antarctic seal hairs and sediment
Entry ID: ECA059

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Summary
Abstract: To reconstruct the profiles of heavy metal levels in the South Ocean ecosystem of Antarctica, the concentrations of lead (Pb), copper (Cu), arsenic (As), cadmium (Cd), and zinc (Zn) in seal hairs and lake sediments spanning the past 1500 years from Fildes Peninsula of King George Island and in weathering lake sediments from Nelson Island of West Antarctica were determined. The lead contents in the seal hairs and the weathering sediments show a sharp increase since the late 1800s, very likely due to anthropogenic contamination from modern industries. After the 1980s, the Pb content in seal hairs dropped by one-third, apparently due to the reduced usage of leaded gasoline in the Southern Hemisphere. Copper arises mainly from the weathering process, and its level may be substantially affected by climatic conditions. The concentrations of Cd, As, and Zn do not show any clear temporal trends.

Temporal Coverage
Start Date: 2002-02-01
Stop Date: 2002-02-29


Location Keywords
OCEAN > SOUTHERN OCEAN > SOUTH SHETLAND ISLANDS
GEOGRAPHIC REGION > POLAR
CONTINENT > ANTARCTICA


Science Keywords
BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >MAMMALS >CARNIVORES >SEALS/SEA LIONS/WALRUSES


ISO Topic Category
ENVIRONMENT


Instrument
AAS >Atomic Absorption Spectrophotometry    [Information]
FLUORESCENCE SPECTROSCOPY    [Information]


Keywords
Hevy metals
anthropogenic source
King George Island


Data Set Progress
COMPLETE


Data Center
University of Science and Technology of China    [Information]
Data Center URL: http://en.ustc.edu.cn/

Data Center Personnel
Name: LIGUANG SUN
Phone: +865513607583
Fax: +865513601415
Email: slg at ustc.edu.cn
Contact Address:
Hefei
City: Anhui
Postal Code: 230023
Country: China



Creation and Review Dates
DIF Creation Date: 2012-07-05
Last DIF Revision Date: 2012-07-30

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