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DGE Newsletter, March 2007
Field & Berry Labs
March 7: Roland Pieruschka told us about methods he has been working on to measure photosynthesis from space. The apparatus he uses measures fluorescence stimulated by laser flashes. So far, his data are difficult to interpret and need more data about stomatal conductance and temperature.
Tasting: Roland brought 12 different varieties of apples. Of the 10,000 varieties in the world and 100 in the USA alone, we sampled pepin, cameo, fuji, granny smith, jonagold, pink lady, red delicious, golden delicious, braeburn, McIntosh, gala & red Rome. Amazing how well all varieties have retained their flavor in storage.
March 14: Dr. Noel Gurwick spoke about some work he collaborated on while at Cornell Univ. He measured the effect of plant roots on nitrogen fluxes along streams.
Tasting: Noel brought some delicious aioli that he had made. He divided it among six bowls and mixed varying amounts of minced garlic into each bowl except one for a control. We then dipped pieces of French bread into the aioli plus garlic. Delicious!
March 21: Today's Seminar speaker, Alan Townsend joined us for a discussion of how nitrogen may cycle through ecosystems. In particular, how the microbiota may change in soils following the addition of nutrient pulses (e.g. phosphorus).
Mar. 29-Apr. 6: Chris Field will be in Brussels for a meeting of the IPCC to do a final edit of their next report due out on the 6th.
March 14: Dr. Ian Faloona from the Dept. Atmospheric Science, Univ. Calif., Davis spoke about DMS Fluxes and the Interaction Among Scales of Variability in and Around the California Current Upwelling System."
March 21: Dr. Alan R. Townsend, Assoc. Director, INSTAAR: An Earth and Environmental Systems Institute & Assoc. Prof., Ecology and Evolutionary Biology, Univ. Colorado, Boulder spoke on Species Controls over Carbon and Nitrogen Cycling in a Lowland Tropical Rainforest.

March 5: Ken Caldeira gave the Eighth Annual Roger Revelle Commemorative Lecture sponsored by the Ocean Studies Board of the Nat’l Academy of Sciences. His popular lecture was titled “What Corals Are Dying to Tell Us.” He also talked with Congressmen about ocean acidification as a result of climate change.
Caldeira has also recently been appointed a Professor-by-Courtesy of geological and environmental sciences at Stanford. This allows him to partner with the Stanford Center for Computational Earth and Environmental Science (CEES) thus gaining access to its large-scale computational resources and to continue modeling global problems of ocean acidification and climate change.
March 12: Former Fellow, David Lobell (now at Lawrence Livermore National Laboratory) & Chris Field made news following the publication of their paper in Environ. Res. Lett. about the impacts of recent global warming on three important food crops. Their results were picked up by the Associated Press and published in newspapers from Sacramento to San Jose and beyond. In addition, Chris may be seen in a short video discussing the paper on the Stanford Report Web Site.
Chris Field and Joe Berry, with Adam Wolf assisting, are teaching a Stanford Graduate Course titled Biosphere/Atmosphere Interactions during the current Winter Quarter.

Asner Lab

The Carnegie Airborne Observatory (CAO) continues to produce initial results focused on Hawaiian rainforest ecosystems and invasive species. The CAO operations are supported by a NASA Terrestrial Ecology-Biodiversity research grant to Greg Asner. Ty Kennedy-Bowdoin has been added to the technical staff for operations, processing, & planning the CAO program.
There are now two advanced micrometerorological towers operating in Hawaiian rainforests. They are measuring carbon and water exchange between the ecosystem and atmosphere. Robin Martin is running the tower studies, and Maoyi Huang is leading the tower data analysis work.
Matt Jones, Ty Kennedy-Bowdoin, and Dave Knapp are exploring the CAO imagery to uncover the effects of invasive species on the carbon cycle of Hawaiian forests.
Paulo Oliveira and Rebecca Raybin are finalizing a study of rainforest disturbance, logging and deforestation throughout the Peruvian Amazon national parks.
Asner has just been selected to be the Chair of the NASA Senior Review Committee.

Landscaping 2007
March 23: In response to the following message from Chris, a number of workers turned out to help. "In general, the DGE landscaping is doing great this year. Thanks to Dahlia and Ismael. There are, however a couple of relatively small problem areas -- one on the North side of the building and one on the South side.  As of today, the annual grasses and other weeds are relatively easy to pull." These two photos were taken at about 10:45 AM on the North side. Looks like back-breaking work to me! Ed. The Ceanothus bushes are splendid on the West side.
Ty Flying the CAO
Tea Time — Wednesdays at 10:30 AM
Archives and PDF Archives of past Newsletters,
Click on photos for enlargement.
Editor Jan Brown, e-mail: jbrown1@stanford.edu