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AGU journal highlights -- March 25, 2009
Date:3/25/2009

arbonate) at a slower rate. Silverman et al. predict the future rate of global decline in the calcification of coral reefs resulting from rising sea surface temperature and ocean acidification. Unlike previous studies, which used results of laboratory experiments, they use measurements made on natural coral reef located in the Red Sea to develop relationships between coral reef calcification, temperature, carbonate ion concentrations, and live coral cover. Using these relationships, they find that most coral reefs are already calcifying more slowly than during preindustrial times. Further, when atmospheric carbon dioxide reaches 560 parts per million (double the preindustrial level), the authors predict that all coral reefs are likely to stop growing and start dissolving.

Title: Coral reefs may start dissolving when atmospheric carbon dioxide doubles

Authors: Jacob Silverman: Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel; Department of Global Ecology, Carnegie Institution, Stanford, California, U.S.A.;

Boaz Lazar, and Jonathan Erez: Hebrew University of Jerusalem, Jerusalem, Israel;

Long Cao, Ken Caldeira: Department of Global Ecology, Carnegie Institution, Stanford, California, U.S.A.

Source: Geophysical Research Letters (GRL) paper 10.1029/2008GL036282, 2009; http://dx.doi.org/10.1029/2008GL036282


2. Ocean proximity aggravates Houston's ozone pollution

In Houston, Texas, understanding atmospheric processes that control pollution formation is complicated by both typical urban emissions and large industrial emissions sourcesmany of the nation's petrochemical facilities are located in southeastern Texas, and these sources release ground-level ozone precursors including nitrogen oxides and highly reactive organic compounds. Simon et al. determine that the pollution profile in Houston is furth
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Contact: Maria-Jose Vinas
mjvinas@agu.org
202-777-7530
American Geophysical Union
Source:Eurekalert

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