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AGU Journal highlights - Feb. 29 2012
Date:2/29/2012

1 percent of the iceberg's initial height. Further, they find that 84 percent of the iceberg's original potential energy would end up as turbulence or heat in the surface ocean waters. While such a large amount of turbulence would be important for surface dynamics in the open ocean, it would be particularly powerful in a semi-enclosed region like the fjord surrounding the Jakobshavn Isbrae glacier, where dozens of icebergs spawn each summer. In the fjord, trillions of megajoules worth of turbulence redistribute the water, destroying temperature and salinity stratifications.

Source: Journal of Geophysical Research-Earth Surface, doi: 10.1029/2011JF002055, 2011 http://dx.doi.org/10.1029/2011JF002055

Title: Laboratory investigations of iceberg capsize dynamics, energy dissipation and tsunamigenesis

Authors: J. C. Burton and N. Guttenberg: Department of Physics, University of Chicago, Chicago, Illinois, USA;

J. M. Amundson, D. S. Abbot, A. Boghosian, L. M. Cathles, K. N. Darnell, and D. R. MacAyeal: Department of Geophysical Sciences, University of Chicago, Chicago, Illinois, USA;

S. Correa-Legisos: Departamento de Fsica, Universidad de Santiago de Chile, Santiago, Chile;

D. M. Holland: Courant Institute of Mathematical Sciences, New York University, New York, New York, USA.


3. Asian emissions contribute to air pollution in western United States

As Asian countries develop, they are emitting more ozone precursors that pollute surface level air. Many studies have documented this pollution being carried by air currents to the western United States. To learn more about the mechanisms that transport air pollution across the ocean and determine the effects of Asian air pollution on air quality in the western United States, Lin et al. analyzed in situ and satellite measurements from May
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Contact: Kate Ramsayer
kramsayer@agu.org
202-777-7524
American Geophysical Union
Source:Eurekalert

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