News 2007

Meetings

The Biomet Lab was well-represented at the recent AGU meeting in San Francisco. Papers and posters given include:

Modeling Radiation and Photosynthesis of a Heterogeneous Savanna Woodland Landscape with a Hierarchy of Model Complexity
*Q Chen, D Baldocchi

Seasonal Trends in Photosynthesis and Mesophyll Conductance in a Mediterranean Oak Savanna
*J Osuna, D Baldocchi

Ecosystem-level water-use efficiency inferred from eddy covariance data: definitions, patterns and spatial up-scaling
*M Reichstein, C Beer, F Kuglitsch, D Papale, J A Soussana, I Janssens, P Ciais, D Baldocchi, N Buchmann, H Verbeeck, R Ceulemans, E Moors, B Köstner, D Schulze, A Knohl, B E Law

Ecohydrologic Hypotheses Revisited: Global Synthesis with Canopy-Scale, FLUXNET Observations
*C A Williams, M Reichstein, N Buchmann, D Baldocchi, D Papale, C Beer

Vegetation and Climatic Controls on the Interannual Variability of Land Surface Energy Balances and Evapotranspiration Over an Oak-Savanna Ecosystem and an Annual Grassland
*Y Ryu, D D Baldocchi

Water use Efficiency in a Blue oak ( Quercus douglasii) Savanna - a Combined Analysis of Stable Isotopes and Eddy Covariance Measurements
*S Mambelli, K P Tu, A Knohl, S Ma, D D Baldocchi, T E Dawson

Global Remote Sensing of Water Use Efficiency: Initial Test and Application of a Synergistic Approach
*K Tu, A Knohl, S Mambelli, S Ma, D Baldocchi, T Dawson

Creating and Accessing the Global Fluxnet Data Set
*D Agarwal, D Baldocchi, T Boden, B Cook, D Frank, M Goode, J Gupchup, S Holladay, M Humphrey, C van Ingen, B Jackson, D Papale, M Reichstein, M Rodriguez, Y Ryu, R Vargas, B Wilson, N Li

Thresholds of Carbon Assimilation and Respiration in a California's Oak/Grass Savanna
*S Ma, D Baldocchi, R Vargas

Modeling Plant-Scale Root Zone Water Dynamics in an Oak Savanna
*X Chen, G Miller, Y Rubin, D Baldocchi

A New Technique for Up-scaling Sap Flow Transpiration Measurements to Stand or Landscape Scale Fluxes
*G R Miller, X Chen, Y Rubin, D Baldocchi

Quasi-continuous Measurements of Methane Fluxes Over a Managed Peatland in the Sacramento-San Joaquin Delta
*M Detto, Y A Teh, W Silver, D Baldocchi, T j Hehn

Constraining spatial patterns and secular trends of springtime phenology with contrasting models based on plant phenology gardens and carbon dioxide flux networks
*M A White, D D Baldocchi, M D Schwartz

Publications

Chen, Q#, Gong, P, Baldocchi, D.D. and Y.Q. Tian. 2006. Estimating Basal Area and Stem Volume for Individual Trees from LIDAR data. Photogrammetric Engineering & Remote Sensing. 73: 1355-1365. 

Baldocchi, D.D ., Wong, S. 2008. Accumulated winter chill is decreasing in the fruit growing regions of California. Climatic Change. published on line.

Baldocchi, D.D . 2007. ‘Breathing’ of the Terrestrial Biosphere: Lessons Learned from a Global Network of Carbon Dioxide Flux Measurement Systems. Australian Journal of Botany. In press.

Knohl, A., Baldocchi, D.D. 2007. Effects of diffuse radiation on canopy gas exchange processes in forest ecosystems. . Journal of Geophysical Research, Biogeosciences. Submitted

Staff News

Two new Baby girls (Ella and Emma) joined the Biomet Families of Youngryel Ryu and Xingyuan Chen. Congratulations

Meetings

Jessica Osuna attended the Japan-US Workshop on phenotypic plasticity in response to environmental changes: scaling from the molecular to ecosystem levels in Nikko, Japan. She gave a presentation on Mechanistic understanding of carbon by California oak on different time scales

Rodrigo Varga and Matteo Detto attended the annual AmeriFlux Meeting in Boulder, CO 

DDB is on sabbatical in France at the Centre Ecologie Fonctionelle et Evolution, CNRS, Montpellier, France. He is working in the groups of Serge Rambal and Laurent Misson.

DDB attended the Workshop on the Relevance of Surface and Boundary Layer Processes for the Exchanges of Reactive and Greenhouse Gases in Wageningen, Netherlands. He gave a presentation on 'Breathing of the Biosphere: Lessons Learned from a Global Network of Carbon Dioxide and Water Vapor Flux Measurements Systems and Applications towards studying Methane

He visited the CREAF Laboratory in Barcelona, Spain and met with Jorge Curiel-Yuste, Josep Penuelas, students and colleagues. A seminar was presented on FLUXNET.

Publications

Curiel Yuste J.*, Baldocchi DD, Misson L.*, Wong S.#, Gershenson A, Goldstein A. 2007. Microbial Soil Respiration and its dependency on Carbon Inputs, Soil Temperature, Moisture. Global Change Biology. Accepted, published on line

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. 2007. 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. Published on line.

Fisher, J#, Tu, K. Baldocchi, D.D. 2007 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. published online.

Ma, S.*, Baldocchi, DD., Xu. L*, Hehn, T. 2007. Interannual variability in carbon exchange of an oak/grass savanna and an annual grassland in California. Agricultural and Forest Meteorology. 147, 157-171

 

Meetings

Rodrigo Vargas attended the Soil Respiration Workshop in Durham, NH

ddb attended the NSF Investigators meeting for Coordinated Research Networks

Meetings

ddb attanded and gave a presentation on Physical and Biological Processes that Control Water Vapor Exchange between Vegetation and the Atmosphere at the Biosphere Continentale: water cycle and Vegetation-Analysis and Prospective. Paris, France. August 27-30, 2007.

(ddb with John Finnigan, Mike Raupach and Ray Leuning; photo courtesy of Andrej Sogochev)

The Ecological Society of America Meeting was in San Jose and the Baldocchi an Dawson labs had two joint posters

Drought tolerant and carbon uptake resulting from year-to-year nitrogen storage in deciduous oak savanna Sian Ma, Dennis D. Baldocchi, Jessica L. Osuna, Stefania Mambelli, Jorge Curiel Yuste, and Liukang Xu

 

A combined analysis of stable isotopes and eddy covariance measurements Stefania Mambelli, Kevin P. Tu, Alexander Knohl, Siyan Ma, Dennis D. Baldocchi, and Todd E. Dawson.

Publications

Baldocchi DD, Xu L (2007) What limits evaporation from Mediterranean oak woodlands - The supply of moisture in the soil, physiological control by plants or the demand by the atmosphere? Advances in Water Resources. Recent Developments in Hydrologic Analysis 30, 2113-2122.

Baldocchi, D.D. 2007. ‘Breathing’ of the Terrestrial Biosphere: Lessons Learned from a Global Network of Carbon Dioxide Flux Measurement Systems. Australian Journal of Botany. submitted.

Ryu, Y. #, Baldocchi, D.D.,Ma, S., and Hehn, T. 2007. Interannual variability of evapotranspiration and energy exchange over an annual grassland in California. Journal of Geophysical Research, Atmospheres. Submitted Aug. 2007.

Staff News

Gretchen Miller passed her PhD Oral Qualifying Exam today. Congratulations

Rodrigo Vargas joined the Biomet Lab as a postdoc on the Fluxnet project. Rodrigo just graduated from UC Riverside. His email will be rvargas@nature.berkeley.edu

Meetings

ddb testified before the California Food and Agricultural Board in Sacramento and gave a presentation entitled ' Global Change and Agriculture: the effects that plants have on climate, and vice versa.

Publications

Curiel Yuste J.*, Baldocchi DD, Misson L.*, Wong S.#, Gershenson A, Goldstein A. 2007. Microbial Soil Respiration and its dependency on Carbon Inputs, Soil Temperature, Moisture. Global Change Biology. manuscript published on-line. 13:1-18

Fisher, J#, Tu, K. Baldocchi, D.D. 2007 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. Accepted, July 2007.

Ma, S.*, Baldocchi, DD., Xu. L*, Hehn, T. 2007. Interannual variability in carbon exchange of an oak/grass savanna and an annual grassland in California. Agricultural and Forest Meteorology. Accepted, July 2007.

White, M, Baldocchi, D, Schwartz, M. Constraining spatial patterns and secular trends of springtime phenology with contrasting models based on plant phenology gardens and carbon dioxide flux networks. Journal of Geophysical Research, submitted.

Visitors

Oliver Sonnetag, a prospective postdoc for the methane project visited from the University of Toronto.

Staff News

Matteo Detto is a new Father. Congratulations.

Visitors

Christian Korner from Univ of Basel visited the Biomet lab.

Meetings

ddb attended the Spring AGU meeting in Acapulco and gave a presentation on the Role of Fluxnetworks in Biogeosciences.

ddb attended the Maximum Entropy Workshop in Jena, Germany May 10 and 11

ddb served on the Science Advisory Panel that reviewed the Max Planck Institute for Biogeochemistry in Jena on May 14 and 15.

Publications

Miller GR, Baldocchi DD, Law BE, Meyers T (2007) An analysis of soil moisture dynamics using multi-year data from a network of micrometeorological observation sites. Advances in Water Resources 30, 1065-1081.

Staff News

Qi Chen graduated with his Ph.D. His thesis is entitled 'Measuring vegetation structure and modeling ecological functions for a heterogeneous savanna ecosystem in California'.

Visitors

Joao Periera from Lisbon visited the Biometlab.

Publications

What Limits Evaporation from Mediterranean Oak Woodlands—the Supply of Moisture in the Soil, Physiological Control by Plants or the Demand by the Atmosphere?  Advances in Water Resources, Available online 10 April 2007,  Dennis D. Baldocchi and Liukang Xu

Misson L, Baldocchi DD, Black TA, Blanken PD, Brunet Y and co-authors. 2007. Partitioning forest carbon fluxes with overstory and understory eddy-covariance measurements: A synthesis based on FLUXNET data. Agricultural and Forest Meteorology 144, 14-31.

Yuan W, Liu S, Zhou G, Zhou G, Tieszen LL and co-authors. 2007. Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes. Agricultural and Forest Meteorology 143, 189-207.

Sundareshwar, P.V., Murtugudde R., Srinivasan G., Singh S., Ramesh K.J., Agarwal D. , Baldocchi D., Baru C.K., Baruah K.K., Chowdhury G.R., V Dadhwal.K. , Dutt C.B.S., Fuentes J., Gupta P.K., Hargrove W.W., Howard M., Jha C.S. , Lal S. , Michener W.K., Mitra A.P., Morris J.T., Myneni R.R., Naja M., Nemani R., Raha S., Ramesh R., Santhana Vanan S.K. , Sharma M., Subramaniam A. , Sukumar R. , Twilley R.R., Verma S.B., Zimmerman P.R.. 2007. INDOFLUX: A Biogeochemical Monitoring Network for India. Science. In press.

Research

We finally have power at the Sherman Island field site and are installing the methane flux system. First measurements were acquired on day 95!

Visitors

Alex Knohl is visiting the Biomet lab for the first part of the month. He is working on a paper evaluating the modeling and experimental effects of diffuse light on canopy mass and energy exchange.

Meetings

ddb gave a presentation on Scientific and Ecological Issues with Carbon Trading. at the 2007 Natural Resources Coordinating Conference. Monterey, CA March 15.

Jorge Curiel Yuste attended a workshop in Innsbruck Austria on Disentangling abiotic and biotic effects on soil respiration

ddb attended the TDL modeling workshop in Santa Fe, New Mexico. March 28-30. The workshop involved analysis of new stable isotope data over a juniper pinyon pine forest from Los Alamos National Lab.

Publications

Miller GR, Baldocchi DD, Law BE, Meyers T (2007) An analysis of soil moisture dynamics using multi-year data from a network of micrometeorological observation sites. Advances in Water Resources 30, 1065-1081.

Wang YP, Baldocchi D, Leuning R, Falge E, Vesala T (2007) Estimating parameters in a land-surface model by applying nonlinear inversion to eddy covariance flux measurements from eight FLUXNET sites. doi:10.1111/j.1365-2486.2006.01225.x. Global Change Biology 13, 652-670.

Special Issue of Global Change Biology, on 2004 Fluxnet Workshop. Tonzi ranch is on the cover

Staff News

Matteo Detto joins the lab as a postdoc working on the NSF Methane project. Matteo comes with a Ph.D in micrometeorologist/environmental engineer from University of Milano, having studied water and energy fluxes of macchia in Sardegna

At the end of March Jorge Curiel Yuste moved back to Europe to start a a Madame Curie Fellowship . He will be based in Spain. In the interim he will spend 2 months in Scotland learning new molecular methods.

Visitors

Markus Reichstein, Dario Papale and Bev Law spent 3 days in Berkeley working on the LaThuile fluxnet workshop post mortem. We got better acquainted with the database and developed plans for followup work.

Meetings

ddb attended the FLUXNET 2007 Synthesis workshop in LaThuile Italy. He served on the scientific steering committee and gave a talk on the FLUXNET project. At the workshop much activity transpired evaluating a new FLUXNET database, consisting of over 600 site years from 180+ field sites.

Publications

Misson L, Baldocchi DD, Black TA, et al. Partitioning forest carbon fluxes with overstory and understory eddy-covariance measurements: A synthesis based on FLUXNET data. Agricultural and Forest Meteorology. published on line

Meetings

Siyan Ma attended the North American Carbon Project meeting in Colorado Springs, CO.

Other

Biomet research on the oak savanna was featured in the Jan 21 issue of the Contra Costa Times

How The Earth Breathes Key to Climate Change

Publications

Fisher, J.B #., Baldocchi, D.D., Misson, L, Dawson, T.E., Goldstein, A.H. What the towers don’t see at night: nocturnal sap flow in trees and shrubs at two Ameriflux sites in California. Tree Physiology, 27: 597-610.

Chen, Q#, Gong, P, Baldocchi, D.D. and G. Xie. 2006. Filtering airborne laser scanning data with morophological methods. Photogrammetric Engineering & Remote Sensing. 73: 175-185

Curiel Yuste J.*, Baldocchi DD, Misson L.*, Wong S.#, Gershenson A, Goldstein A. 2006. Microbial Soil Respiration and its dependency on Carbon Inputs, Soil Temperature, Moisture. Global Change Biology. accepted