News 2006

Meetings

Annual Meeting of American Geophysical Union, San Francisco, Dec 2006.

Baldocchi, D Ma, S Phenology and CO2 Exchange of Ecosystems:

Ma, S Baldocchi, D Using Biologically-informed Climatic Factors to Reconstruct Interannual Carbon Exchange in a California's Grassland

Chen, X Rubin, Y Baldocchi, D Observations and Stochastic Modeling of Soil Moisture Control on Evapotranspiration in an Oak-Savannah Ecosystem

Miller, G R Chen, X Rubin, Y Baldocchi, D Chen, Q Designing a Stand-scale Network of Plant-level Water Flux Measurement Stations using Cluster Analysis and Geostatistical Techniques

Curiel Yuste, J Baldocchi, D D Misson, L Gershenson, A Wong, S Goldstein, A Microbial Soil Respiration and its dependency on Carbon Inputs, Soil Temperature and Moisture in two contrasting ecosystems

Proposals

The FLUXNET Proposal to NSF was successful and will be supported. A proposal was submitted to the National Science Foundation call for Research Coordinated Networks and is entitled 'FLUXNET : A Global Network Measuring and Assessing Spatial-Temporal Variability of Carbon Dioxide, Water Vapor and Energy Fluxes between the Terrestrial Biosphere and Atmosphere' It is a collaboration with our FLUXNET colleagues Bev Law, Riccardo Valentini, Hank Margolis, Yoshikazu, Ohtani, Niall Hanan, Gui-Rui Yu, Alex Knohl, Bob Cook and Ray Leuning.

Publications

Sims, Daniel A.; Rahman, Abdullah F.; Cordova, Vicente D.; El-Masri, Bassil Z.; Baldocchi, Dennis D.; Flanagan, Lawrence B.; Goldstein, Allen H.; Hollinger, David Y.; Misson, Laurent; Monson, Russell K.; Oechel, Walter C.; Schmid, Hans P.; Wofsy, Steven C.; Xu, Liukang. On the use of MODIS EVI to assess gross primary productivity of North American ecosystems. J. Geophys. Res., Vol. 111, No. G4, G04015. 10.1029/2006JG000162.

Chapin FS, Woodwell GM, Randerson JT, Rastetter EB, Lovett GM, Baldocchi DD, Clark DA, Harmon ME, Schimel DS, Valentini R, Wirth C, Aber JD, Cole JJ, Goulden ML, Harden JW, Heimann M, Howarth RW, Matson PA, McGuire AD, Melillo JM, Mooney HA, Neff JC, Houghton RA, Pace ML, Ryan MG, Running SW, Sala OE, Schlesinger WH, Schulze E-D (2006) Reconciling Carbon-cycle Concepts, Terminology, and Methods. Ecosystems 9:1041-1050.

Meetings

ddb and Jorge Curiel Yuste attended the Open Science Conference on the Greenhouse Gas Cycle in the Northern Hemisphere. Sissi-Lassithi, Crete, Nov 14-18, 2006.

ddb talked on:

Separation of autotrophic and heterotrophic respiration and their link to canopy photosynthesis.

Jorge talked on:

Microbial soil respiration and its dependency on organic matter quality, soil temperature and moisture.

We also co-authored a report by Laurent Misson of the Goldstein lab

Misson, L. Baldocchi, D., Black, T. Blanken PD, Brunet, Y., Curiel Yuste, J., Dorsey, J., Falk, M. Granier, A., Irvine, J., Jarosz, N., Lamaud, E. Law, B. Longdoz, B. Loustau, D., McKay, M. Paw U, KT, Vickers, D., Wilson, K. Goldstein, A. Partitioning forest carbon fluxes with overstory and understory eddy covariance measurements: a synthesis based on Fluxnet data.

ddb participated in a set of short courses for Inter-University Scholar on ‘Engaging with California government on climate change’. Woods Institute for the Environment. Stanford University.

Meetings

Gretchen Miller, Siyan Ma and Dennis Baldocchi attended the annual AmeriFlux meeting in Boulder (Oct 16-18). Gretchen gave an invited presentation on the Berkeley Water Center-Microsoft Data Cube system that is being used to analyze mass quantities of AmeriFlux data. Siyan gave a poster on interannual variability of carbon fluxes over the savanna and grassland and posted Jorge's poster on soil carbon turnover.

Publications

Snyder, R.L., D. Spano, P. Duce, D. Baldocchi, L. Xu, and K.T. Paw U, A fuel dryness index for grassland fire-danger assessment, Agricultural and Forest Meteorology, 139 (1-2), 1-11, 2006.

Staff News

James Dorsey completed his tenure here in the Biometeorology Lab and is returning to the University of Mancester in the UK to work in Martin Gallagher's lab on atmospheric physics. James has worked on developing a 3-d footprint model that considers canopy turbulence and he put together the new methane flux system.

Submissions

Misson, L.*Baldocchi DD; Black TA; Blanken PD; Brunet Y; Curiel Yuste J*; Dorsey JR*; Falk M*; Granier A; Irvine MR; Jarosz N; Lamaud E; Launiainen, S; Law BE; Longdoz B; Loustau D; McKay M; Paw U KT; Vesala, T; Vickers D; Wilson KB*; Goldstein AH. 2006. Partitioning Forest Carbon Fluxes with Overstory and Understory Eddy-Covariance Measurements: a Synthesis Based on FLUXNET Data. Agricultural and Forest Meteorology

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.

Visitors

Walt Oechel, San Diego State

Beate Liepert, Columbia Univ

Meetings

DDB gave presentation on Climate Change and Agriculture: Trends and Bi-Directional Impacts . at 3 rd Annual Climate Change Research Conference, Sacramento, CA Sept 14, 2006.

Staff News

Xingyuan Chen was awarded a Horton Fellowship from the American Geophysical Union.

Proposals

We received news from NSF of a tenative decision to support our project 'Understanding the Coupling of Greenhouse Gases (Methane, Carbon Dioxide, Water Vapor) and Energy Fluxes and Scaling them across a Spectrum of Time and Space over a Vulnerable Ecosystem and a Biological Hot Spot: the Sacramento-San Joaquin Delta Peatland'.

Publications

Chen Q.#, Baldocchi D.D., Gong P. & Kelly M. (2006) Isolating Individual Trees in a Savanna Woodland using Small Footprint LIDAR data. Photogrammetric Engineering & Remote Sensing., 72, 923-932.

Castellvi, F., Synder, R., Baldocchi, D.D., Martinez-Cob, A. 2006. A Comparison of New and Existing Equations for Estimating Sensible Heat Flux Density using Surface Renewal and Similarity Concepts. Water Resources Research. Vol. 42, W08406, doi:10.1029/2005WR004642, 2006.

Staff News

Youngryel Ryu joins the Biometeorology lab as a new graduate student.

Visitors

Dario Papale, from Universita' di Tuscia, and Markus Reichstein, from Max Planck Institute for Biogeochemistry, Jena, visited the Biomet lab to continuing planning for the upcoming Fluxnet data synthesis workshop (Feb 19-22, 2007, Sesto, Italy) and prepare a new generation of gap filled datasets to use in the synthesis.

Meetings

DDB attended theh Indo-US Workshop on IndoFlux, Chennai, India, July 12-16, 2006 and gave a presentation on 'Lessons learned from a global network of flux measurements sites-FLUXNET' .

DDB gave 4 hours of lectures on ' interpreting CO2 flux measurements and on Modeling CO2 exchange between vegetation and the atmosphere' at CarboEurope Summer School, Eddy Covariance Flux Measurements , Wepion, Belgium, July 18, 2006. About 40 students from Europe were in attendance.

Publications

Kucharik, C. J., C. C. Barford, M. E. Maayar, S. C. Wofsy, R. K. Monson, and D. D. Baldocchi, 2006:
A multiyear evaluation of a Dynamic Global Vegetation Model at three AmeriFlux forest sites:
Vegetation structure, phenology, soil temperature, and CO2 and H2O vapor exchange. Ecological Modelling, 196, 1-31.

Grant R.F., Zhang Y., Yuan F., Wang S., Hanson P.J., Gaumont-Guay D., Chen J., Black T.A., Barr A., Baldocchi D.D. & Arain A. (2006)
Intercomparison of techniques to model water stress effects on CO2 and energy exchange in temperate and boreal deciduous forests. Ecological Modelling, 196, 289-312.

Snyder, R. L., D. Spano, P. Duce, D. Baldocchi, L. Xu, and K. T. Paw U:
A fuel dryness index for grassland fire-danger assessment. Agricultural and Forest Meteorology, In Press, Corrected Proof.

Baldocchi, D.D., Wong, S. 2006. Accumulated Winter Chill is Decreasing in the Fruit Growing Regions of California. Climatic Change. Submitted, July 2006.

Proposals

We received news on funding of our DOE/TCP proposal entitled 'Quantifying and Understanding Interannual Variability of Carbon, Water and Energy Exchange of an Oak Savanna and an Annual Grassland Ecosystem AmeriFlux Site'

A proposal was submitted to the National Science Foundation call for Research Coordinated Networks entitled 'FLUXNET : A Global Network Measuring and Assessing Spatial-Temporal Variability of Carbon Dioxide, Water Vapor and Energy Fluxes between the Terrestrial Biosphere and Atmosphere' It is a collaboration with our FLUXNET colleagues Bev Law, Riccardo Valentini, Hank Margolis, Yoshikazu, Ohtani, Niall Hanan, Gui-Rui Yu, Alex Knohl, Bob Cook and Ray Leuning.

Publications

Baldocchi, D.D ., Tang, J*. Xu, L*. 2006. How Switches and Lags in Biophysical Regulators Affect Spatio-Temporal Variation of Soil Respiration in an Oak-Grass Savanna. Journal of Geophysical Research, Biogeosciences. 111, G02008, doi:10.1029/2005JG000063.

Funk, Jennifer L.; Giardina, Christian P.; Knohl, Alexander; Lerdau, Manuel T. Influence of nutrient availability, stand age, and canopy structure on isoprene flux in a Eucalyptus saligna experimental forest. J. Geophys. Res., Vol. 111, No. G2, G02012. 10.1029/2005JG000085

Heinsch, F. A., M. Zhao, S. W. Running, J. S. Kimball, R. R. Nemani, K. J. Davis, P. V. Bolstad, B. D. Cook, A. R. Desai, D. M. Ricciuto, B. E. Law, W. C. Oechel, H. Kwon, H. Luo, S. C. Wofsy, A. L. Dunn, J. W. Munger, D. D. Baldocchi, L. Xu, D. Y. Hollinger, A. D. Richardson, P. C. Stoy, M. B. S. Siqueira, R. K. Monson, S. P. Burns, and L. B. Flanagan. 2006. Evaluation of Remote Sensing Based Terrestrial Productivity From MODIS Using Regional Tower Eddy Flux Network Observations. Geoscience and Remote Sensing, IEEE Transactions on 44:1908-1925.

Meetings

ddb and Siyan Ma attended the Agricultural and Forest Meteorology and Boundary Layer Meteorology meetings of the American Meteorological Society in San Diego, May 22-25. Both gave presentations.

27 th Conference on Agricultural and Forest Meteorology, American Meteorological Society, San Diego, CA May 22-25, 2006

Falk, M, Baldocchi, DD, Ma, S., Ustin, SL, Mercado, IR. Linking the Seasonal Variation of Vegetation Indices to Tower Flux Measurements.

Ma, S., Baldocchi, DD, Hehn, T. CO 2 Concentration and Flux in a California's Oak/Grass Savanna

17 th Symposium on Boundary Layers and Turbulence, American Meteorological Society, San Diego, CA May 22-25, 2006

Evaluating Sub-Grid Variability of Surface Fluxes with a Cellular Automata Version of the Wet-Dry DaisyWorld Model Dennis Baldocchi, University of California, Berkeley, CA; and J. Dorsey and M. Leclerc.

Staff News

Qi Chen is recipient of the Schubert Prize for outstanding scholarship in the field of
Ecosystems Sciences

Josh Fisher finished his Dissertation on, ‘I. The land-atmosphere water flux across plant, ecosystem, global and social scales; II. GIS and spatial analysis for environmental justice and wildlife’ and graduated this May.

Xingyuan Chen passed her Orals Defense in CEE and is now a PhD Candidate.

Meetings

James Dorsey gave a Seminar on Lagrangian Footprint modeling at the Berkeley Atmospheric Science Center monthly meeting.

Publications

Kim J, Guo Q, Baldocchi DD, et al. (2006) Upscaling fluxes from tower to landscape: Overlaying flux footprints on high-resolution (IKONOS) images of vegetation cover. Agricultural and Forest Meteorology, Advances in Surface-Atmosphere Exchange - A Tribute to Marv Wesely 136, 132-146.

Research

Ted Hehn has constructed and installed the new radiation tram system at the Tonzi Ranch. The system moves back and forth along a 30 m path. It ports itself at night and its batteries recharge.

Staff News

Youngryel Ryu, from Seoul National University, was admitted to the graduate class entering Fall, 2006, and will join the Biometeorology Lab.

Ilse Mercado-Ruiz announced her engagement to Fermin.

Alex Knohl ended his two year stay in Berkeley and returned to the Max Planck Institute for Biogeochemistry in Jena. The Biomet Lab had its traditional good bye lunch at 'the Chinese Restraurant'

Meetings

ddb gave presentation, co-authored with Siyan Ma, on carbon and water exchange to the Natural Resources Coordinating Conference, March 14, 2006 ddb gave seminar on 'Looking at Biopsphere-Atmosphere Interactions Differently: Assessing Roles of Switches, Lags and Pulses on Carbon, Water and Energy Fluxes with Data from a Global Network – Fluxnet'. University of Toronto , Centre for Global Change Science, Distinguished Lecturer Seminar Series. March 21, 2006. Alex Knohl gave seminar for the Max Planck Society. ProposalsTwo proposals were submitted for pier review. One to DOE Terrestrial Carbon Project on Interannual variability of carbon, water and energy exchange of an oak savanna. It is in collaboration with Prof. John Battles. The second proposal went to NSF Carbon and Water. It is a collaborative effort with Prof. Whendee Silver and Maggie Kelly. The project is on measuring and modeling methane fluxes over a peatland. We propose to do the work on Sherman Island in the Delta and measure methane fluxes with the Los Gatos tunable diode spectrometer.

Proposals

A proposal was submitted to the National Science Foundation on 'Understanding the Coupling of Greenhouse Gases (Methane, Carbon Dioxide, Water Vapor) and Energy Fluxes and Scaling them across a Spectrum of Time and Space over a Vulnerable Ecosystem and a Biological Hot Spot: the Sacramento-San Joaquin Delta Peatland'. It will be a collaborative effort with Whendee Silver and Maggie Kelly.

Publications

Baldocchi, DD. Wong, S. 2006. An Assessment of Impacts of Future CO₂ and Climate on Agriculture.
FINAL white paper from California Climate Change Center, publication # CEC-500-2005-187-SD, posted: March 15, 2006

http://www.energy.ca.gov/2005publications/CEC-500-2005-187/CEC-500-2005-187-SF.PDF

Reithmaier, L. M., M. Gockede, T. Markkanen, A. Knohl, G. Churkina, C. Rebmann, N. Buchmann, and T. Foken. 2006. Use of remotely sensed land use classification for a better evaluation of micrometeorological flux measurement sites. Theoretical and Applied Climatology 84:219-233.

Visitors

Ray Leuning from CSIRO in Australia visited. Ray gave a seminar on his study of CO2 exchange over eucalypt.

Meetings

ddb, Alex Knohl, Jorge Curiel-Yuste and Matthias Falk attended the International Land-Ecosystem-Atmosphere Processes (ILEAPS) 1st Science Conference in Boulder, CO, Jan 22-24. ddb gave a keynote lecture, co-authored with Knohl and James Dorsey on 'Using biophysical models to ask (and answer) questions about biosphere-atmophere interactions', Jorge gave a contributed lecture on 'Spatial and temporal variability of soil microbial decomposition-derived CO 2 efflux at two contrasting Mediterranean ecosystems' and Alex presented a poster on ''Modeling canopy carbon
discrimination in a dense forest with a multi-layer biophysical model' .ddb also attended the science steering committee meeting, prior to the workshop, and reported on Fluxnet, which is an ILEAPS project.

Publications

Baldocchi, D.D., Tang, J. Xu, L. 2005. How Switches and Lags in Biophysical Regulators Affect Spatio-Temporal Variation of Soil Respiration in an Oak-Grass Savanna. Journal of Geophysical Research , Biogeosciences. accepted

Staff News

Matthias Falk ended his tenure at Berkeley Jan 31, with the cessation of funding for the FLUXNET project. He is moving on to Davis and Susan Ustin's lab