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DGE Newsletter, May 2006
May 31: Dr. Nancy Grimm, Arizona State Univ. , Tempe spoke about the Urbanization of the desert: Patterns of change in biodiversity, biogeochemistry, and socio-ecological interaction. She and her colleagues have collected data about how the expansion of Phoenix over the surrounding desert
May 8: Ken Caldeira visited the Hadley Centre in Exeter, England, to discuss using their coupled ocean/atmosphere model for simulations of past and future climate. On this trip, he also stopped by Cambridge University to discuss modeling carbon and oxygen isotopes in marine organisms with Professor Harry Elderfield, whom Ken met while they both served on a Royal Society panel investigating the effects of ocean acidification.
May 16: The Organization of Economic Cooperation and Development (OECD) invited Ken Caldeira to Paris to address a sub-ministerial group developing science and technology research policy in the area of energy technology development. While there, he also visited the Institute Pierre Simon Laplace in the suburbs of Paris where he gave talks on ocean acidification and the climate effects of forests.
May 19: Chris Field gave a seminar at the John Innes Centre, Norwich, UK. May 31: Dave Kroodsma has arrived in Colombia, and plans to bike the stretch from Cartagena to Bogota. He spent a week in Panama City where he visited three schools and found himself on the front page of the national newspaper.
landscape has affected plant diversity, water and mineral supplies relative to the economic status of the people.
May 24: Prof. James Ehleringer, Univ. Utah spoke about Ecophysiology: Still necessary for interpreting ecosystem processes. He showed how an understanding of CO2 and water vapor exchange through the stomata as well as the hydraulics of transport through the plant helps to explain the "breathing of the planet."
May 10: Dr. Xu Liang, Civil & Environmental Engineering, UC Berkeley spoke about Land Surface Modeling - Routing and Its Relevant Processes. She focused on processes related to network connections and routing to improve the representation of spatial variability on water cycles.  In particular, a new multi-scale
Field & Berry Groups
This month we welcome Post Doc. Roland Pieruschka from the Juelich Research Institute, Dusseldorf Univ. He will be working at Jasper Ridge to test the application of the laser-induced fluorescence transient (LIFT) instrument. Look for his photo on our Personnel Web Site.
May 25: Jim Ehleringer gave a second seminar on "forensic"  isotope and nutrient analysis.

May 18: Joe Berry led a discussion of the paper by Mooney et al. Exchange of Materials between Terrestrial Ecosystems and the Atmosphere in Science 238, Nov. 1987.
Tasting: Joe also brought several kinds of expresso coffee beans to compare in the machine downstairs.
May 11: Joe Berry & Hal Mooney led a discussion of how predictions of nuclear winter (or at least autumn) caused by large atomic explosions would affect climate on a global scale. These led to meetings in the early 1980ies in which climate modelers and biologists began collaborating on an international level, in turn, leading to organizations such as the IPCC that we have today.
May 4: Kim Cahill
led a discussion of land use and the carbon balance based on two papers; Global Deforestation, Science 1983, Woodwell et al; and another by Houghton in the 2003 IPCC Fourth Assessment Report. It was noted that the 1983 paper could have been written today because they got most everything right!
Tasting: Kim brought several unusual exotic fruits. The horn melon was extremely beautiful but disappointing in taste while the cherimoya was the most delicious but cost $6.59.
Chris Field was in Washington, DC this week for the Carnegie Annual Meeting.
approach for generating flow networks for land surface models that are applicable at different spatial scales was presented.  This new approach allows runoff in a model grid to exit by multiple directions simultaneously, and introduces a scaling factor, the tortuosity coefficient, to determine hydrologic parameters for more accurate representation of water fluxes across different spatial scales.
May 3: Long Cao, PhD student in the Dept. Atmospheric Sciences, Univ. Illinois, talked about recent climate-carbon modeling work. He discussed some preliminary results regarding the response of ocean circulation, oceanic uptake of atmospheric CO2, and marine ecosystems to climate change. Ken Caldeira is one of his mentors.
May 8 is the latest date yet to begin harvesting the growth in the experimental plots on Jasper Ridge. The unusually late rains have created havoc with schedules. Audrey Niboyet from Univ. Paris Sud and Jessica Mentzer, a graduate student from Univ. Wisconsin had to return to their respective labs to analyze some of the soil collected from the plots. Photos to the left taken on May 12 in the laboratory at Jasper Ridge show Alison, John, Nona, Julie Allen (temp. hire) and Sharon Brauman (volunteer) analyzing the plant material collected from the plots. Even though the late harvest date might have predicted increased weights, that was not the case; probably because of unusually cool weather in March.
Archives and PDF Archives of past Newsletters, Click on photos for enlargement.
Editor Jan Brown, e-mail: jbrown@globalecology.stanford.edu