News 2008
June
publications
Ryu, Y., Kang, S., Moon, S.-K. and Kim, J., Evaluation of land surface radiation balance derived from moderate resolution imaging spectroradiometer (MODIS) over complex terrain and heterogeneous landscape on clear sky days. Agricultural and Forest Meteorology, In Press, Corrected Proof.
Allen, M.F., R. Vargas, E.A. Graham, W. Swenson, M. Hamilton, M. Taggart, T.C. Harmon, A. Rat'ko, P. Rundel, B. Fulkerson, and D. Estrin, Soil sensor technology: Life within a pixel, Bioscience, 57 (10), 859-867, 2007.
Carbone, M.S., and R. Vargas, Automated soil respiration measurements: new information, opportunities and challenges, New Phytologist, 177 (2), 295-297, 2008.
Vargas, R., M.F. Allen, and E.B. Allen, Biomass and carbon accumulation in a fire chronosequence of a seasonally dry tropical forest, Global Change Biology, 14 (1), 109-124, 2008.
Travel
ddb co-taught a short course, with Prof Park Nobel, on Trends in plant ecophysioligy and ecosystem ecology research at the University of Palermo. About 70 students from 17 countries were in attendance during the week.
ddb also visited the University of Tusica and presented a seminar on the Fluxnet project
Visitors
Ms Dimmie Hendricks, a graduate student from Free University, in Amsterdam was in residence for a month. Dimmie works on measuring methane fluxes with eddy covariance over peatland pastures in Holland.
Misc.
Ted Hehn resigned at the end of the month to take a new position with NEON. Ted was a cornerstone of the biomet program since 2001 with his diverse set of abilities as the lab technician. Ted's skills in instrument design and fabrication, field work and general and diverse shop skills will be sorely missed and hard to replace. But new opportunities await him in his new position. Good Luck Ted
May
publications
Ryu, Y. , Baldocchi, D.D.,Ma, S., and Hehn, T. 2008. Interannual variability of evapotranspiration and energy exchange over an annual grassland in California. Journal of Geophysical Research, Atmospheres. 113, D09104, doi:10.1029/2007JD009263
Knohl, A., Baldocchi, D.D. 2008. Effects of diffuse radiation on canopy gas exchange processes in forest ecosystems. . Journal of Geophysical Research , Biogeosciences . 113 : G02023, doi:10.1029/2007JG000663
Detto, M., Katul, G., Mancini, M., Montaldo, N. and Albertson, J.D., 2008. Surface heterogeneity and its signature in higher-order scalar similarity relationships. Agricultural and Forest Meteorology, 148(6-7): 902-916.
Chen, Q., Baldocchi, D., Gong, P. and Dawson, T., 2008. Modeling radiation and photosynthesis of a heterogeneous savanna woodland landscape with a hierarchy of model complexities. Agricultural and Forest Meteorology, 148(6-7): 1005-1020
Castellví, F., Snyder, R.L. and Baldocchi, D.D., 2008. Surface energy-balance closure over rangeland grass using the eddy covariance method and surface renewal analysis. Agricultural and Forest Meteorology, 148(6-7): 1147-1160.
Misc
Volume 2 of FLUXNET FluxLetter was published
Youngryel Ryu will receive a NASA Earth and Space Science Fellowship for his project titled 'Improving global terrestrial estimates of evaporation un climate change with a synergy of Modis, FLUXNET and ecophysiological models.
Youngryel joins Nancy Kiang, Josh Fisher and Qi Chen, among past Biomet Lab students, who have received this fellowship.
The Publisher of Agricultural and Forest Meteorology informed us that two of our our papers from the Oak Savanna-Grassland study were among the Top 10 most cited articles in Agricultural and Forest Meteorology from 2003-2008.
'How plant functional-type, weather, seasonal drought, and soil physical properties alter water and energy fluxes of an oak-grass savanna and an annual grassland'. Agricultural and Forest Meteorology, 123(1-2): 13-39. 2004
Seasonal variation in carbon dioxide exchange over a Mediterranean annual grassland in California. Agricultural and Forest Meteorology, 123(1-2): 79-96. 2003
Employment Opportunities
The Biomet Lab will be recruiting a new Meteorological Technician. If interested please contact Dennis Baldocchi.
April
publications
Sims,D. A., Rahman, A.F., Cordova, V.D., El-Masri, B.Z., Baldocchi, D.D., Bolstad, P.V, Flanagan, L.D., Goldstein, A.H., Hollinger, D.Y., Misson, L., Monson, R.K., Oechel, W.C.,Schmid, H.P., Wofsy, S.C., Xu, L. 2008. A new model of gross primary productivity for North American ecosystems based solely on the enhanced vegetation index and land surface temperature from MODIS. Remote Sening of the Environment.. 112(4): 1633-1646
meetings
ddb gave a department seminar on 'Breathing of the Biosphere, the Role of Flux Networks' for the Department of Civil and Environmental Engineering, Princeton University, April 14, 2008 and
a Cal Day Presentation on 'Science and Ecology of Carbon Offsets'. powerpoint presentations are available for inspection on nature.berkeley.edu/biometlab/Lectures
misc
Youngryel Ryu passed his oral examination and is now a Ph.D Candidate. Congratulations!
Collaborating graduate student, Alan DiVittorio, filed his dissertation entitled ' A biochemical leaf spectral model and method for characterizing ozone damage in pine' Congratulations Dr. DiVitorrio!
'Making Sense of CO2 data: a Microsoft/Berkeley Collaboration' . A Blog Interview of Catharine van Ingenen and ddb on Flux Networks and Databases
http://perspectives.on10.net/blogs/jonudell/Making-sense-of-C02-data/
March
Publications
Fisher, J, Tu, K. Baldocchi, D.D. 2008 Global estimates of the land-atmosphere water flux: a fully-remote sensing driven, flux site-validated ecophysiological model of evapotranspiration. Remote Sensing of the Environment. 112, 901-919.
Baldocchi, D.D., Wong, S.# 2008. Accumulated winter chill is decreasing in the fruit growing regions of California. Climatic Change. 87, S153-S166.
Visitors
Eddy Moors from Wageningen University and ALTERRA, Netherlands, visited to discuss carbon sequestration by peatland and wetland ecosystems and collaborative work between teams in California and the Netherlands.
misc
Youngryel Ryu was quoted in a Nature news article about plans to build a canal across Korea Korean and its ecological costs.
http://www.nature.com/news/2008/080319/full/news.2008.679.html
February
Publications
Baldocchi, D.D . 2008. ‘Breathing’ of the Terrestrial Biosphere: Lessons Learned from a Global Network of Carbon Dioxide Flux Measurement Systems. Australian Journal of Botany. 56, 1-26.
Falk, M., Ruiz, I., Ma, S. Hehn, T., Baldocchi, D. Linking the Seasonal Variation of Vegetation Indices with Ecosystem Carbon Flux Measurements: Comparing the Performance of Ground- and Satellite-based Sensors With Different Spectral Resolution. Agricultural and Forest Meteorology. submitted
Meetings
ddb gave an invited presentation on 'Why Ecologists need Soil Physics, and Vice Versa' at the 2008 Kirkham Conference on Soil Physics: Research on the Frontiers of Earth's Life Support System in Davis, Feb 25-26.
Awards
Gretchen Miller won an award for Outstanding Student Paper Award for presentation at the 2007
Fall Meeting of the American Geophysical Union in San Francisco, California. Her presentation was entitled ' A new technique for upscaling
sap flow transpiration measurements to stand or landscape scale fluxes.
January
Publications
Youngryel Ryu's paper on interannual variability of evaporation from an annual grassland was accepted for publication in Journal of Geophysical Research, Atmospheres
Alexander Knohl's paper on modeling and measuring the effects of diffuse light on carbon dioxide exchange, water use efficicieny, stable isotopes and isoprene emissions was accepted for publication in Journal of Geophysical Research, Biogeosciences
Meetings
ddb attended the NCEAS workshop on 'Terrestrial Ecosystems and Climate Policy' in Santa Barbara and gave a presentation on
'Measuring and modeling energy exchange of a woodland and grassland: A case for landscape modification'
Misc
Links to Movies of the Vaira and Tonzi field sites are now available on
http://nature.berkeley.edu/biometlab/fieldpics
Watch the grass grow and decompose, clouds pass and the trees leaf out and senesce over the course of a year
New FLUXNET Newsletter has been just released
