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AGU Journal Highlights -- March 19, 2008
Date:3/19/2008

ected from the Gulf of Panam where deep waters upwell. Using a laser ablation technique, they found that the ratio of phosphorus to calcium within the coral skeleton tracks the ratio of strontium to calcium. Because high strontium-to-calcium ratios indicate cooler ocean temperatures, the authors are able to link the coral skeleton phosphorus content to documented seasonal upwelling of cold nutrient-rich water. The authors expect that further development of this new method will allow scientists to reconstruct changes in past nutrient availability in the tropics and subtropics with high precision over long timescales.

Title: Skeletal P/Ca tracks upwelling in Gulf of Panam coral: Evidence for a new seawater phosphate proxy

Authors: Michle LaVigne, M. Paul Field, and Eleni Anagnostou: Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, New Jersey, U.S.A.;

Andra G. Grottoli: School of Earth and Planetary Sciences, Ohio State University, Columbus, Ohio, U.S.A.;

Gerard M. Wellington: Department of Biology and Biochemistry, University of Houston, Houston, Texas, U.S.A.;

Robert M. Sherrell: Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, New Jersey, U.S.A.; also at Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey, U.S.A.

Source: Geophysical Research Letters (GRL) paper 10.1029/2007GL031926, 2008; http://dx.doi.org/10.1029/2007GL031926


12. Lead levels rose in North Pacific region atmosphere as declined around North Atlantic

Atmospheric lead pollution, primarily emitted by combustion of leaded gasoline and capable of being transported over long distances, can contribute to neurotoxic effects on children. Although lead pollution in regions surrounding the North Atlantic is known to have increased rapidly following the Industrial Revolution but de
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Contact: Peter Weiss
pweiss@agu.org
202-777-7507
American Geophysical Union
Source:Eurekalert

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