AGU journal highlights -- July 23, 2008(because most land changes did not result...)

Date:7/24/2008

because most land changes did not result from deforestation but instead involved converting grassland (pasture) to crops. However, the authors note that basin response, namely, that flows at the basin outlet now occur about 2 days sooner than in the 1960s, appears to be attributable solely to land cover change between the 1960s and the 1990s.

Title: Land use impact on the Uruguay River discharge

Authors: Ramiro I. Saurral and Vicente R. Barros: Center for Atmospheric and Oceanic Research, National Scientific and Technical Research Council, University of Buenos Aires, Buenos Aires, Argentina; also at Department of Atmospheric and Ocean Sciences, University of Buenos Aires, Buenos Aires, Argentina;

Dennis P. Lettenmaier: Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington, U.S.A.

Source: Geophysical Research Letters (GRL) paper 10.1029/2008GL033707, 2008; http://dx.doi.org/10.1029/2008GL033707

---

6. Reexamining stratosphere effects on lower-atmosphere warming

It is well established that the troposphere, the atmospheric layer closest to the Earth's surface, significantly influences the circulation of the stratosphere, the layer above the troposphere. The alternate possibility, that the stratosphere can have significant downward influence on tropospheric circulation, is less well established. Sigmond et al. investigate the potential for such downward influence to alter current predictions of global warming. Comparing the predicted warming response in two general circulation modelsone with a well-resolved stratosphere (high-top version) and one without a well-resolved stratosphere (low-top version)they find significant differences. While similar results in the past have been taken as evidence that a well-resolved stratosphere is essential for modeling future climate projections, the authors que
'/>"/>

Contact: Peter Weiss pweiss@agu.org 202-777-7507 American Geophysical Union Source:Eurekalert

0 GOOD

Page: 1 2 3 4 5 6 7 8
Related biology news :

1. News tips from the Journal of Neuroscience
2. Tips from the Journals of the American Society for Microbiology
3. Story ideas from the Journal of Lipid Research
4. Highlights from the September 2007 Journal of the American Dietetic Association
5. AGU journal highlights -- Sept. 6, 2007
6. Springer will publish Journal of Coastal Conservation
7. ESA celebrates 100 years of insect science journals
8. Springer and the New York Botanical Garden Press join forces to publish botanical journals
9. 200 journals join in theme issues on poverty and human development
10. New ETH Zurich article published in scientific journal Nature
11. Media highlights in the November issues of Biophysical Journal