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News 2012

December
Meetings

The Biometeorology Lab was well represented at the recent AGU meeting in San Francisco. Among the presentations and posters were

Siyan Ma, B23A-0438. Soil CO2 flux depends on timing divergence between soil temperatures and CO2 productions driven by soil moisture in different depths in an oak-grass savanna ecosystem

Laurie Koteen, B23I-07. The invasion of non-native grasses into California grasslands has caused a shift in energy partitioning between latent and sensible heat flux, reduced albedo and higher surface temperatures

Eric Waller, A43B-0130. Thirty Years of Cloud Cover Patterns from Satellite Data: Fog in California’s Central Valley and Coast

Dennis Baldocchi B43J-01. Using a Network of Flux Towers to Investigate the Effects of Wetland Restoration on Greenhouse Gas Fluxes

Jaclyn Hatala, B43J-02. Incorporating spatial heterogeneity into the measurement of methane and carbon dioxide fluxes from a restored wetland


Sebastian Wolf, B44A-02. Flux Partitioning of Water Vapor and Carbon Dioxide in a Californian Oak Savanna

Sara Knox, B51B-0507. Continuous measurements of soil CO2 concentration and soil respiration from a grazed degraded peatland in the Sacramento-San Joaquin Delta

Martin Beland, B52C-02. What is clumping? And the role of terrestrial LiDAR in its characterization

Naama Raz-Yaseef. H53C-1539. Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar

Other Meetings

ddb attending the COSMOS workshop at the University of Arizona, Tucson and presented a talk on Ecology and Soil Moisture: Using an Oak-Grass Savanna as a Model System for Studying the Effects of Soil Moisture Dynamics on Water and Carbon Exchange

Jaclyn Hatala gave a seminar on her PhD research at Cornell University.

Publications

Peichl, M, Sonnentag, O., Wohlfahrt, G., Flanagan, L.B., Baldocchi, D.D., Kiely, G., Galvagno, M., Gianelle, D., Marcolla, B., Pio, C., Migliavacca, M., Jones, M.B. Saunders, M. Convergence of potential net ecosystem production among contrasting C3 grassland. Ecology Letters. In press.

Staff News

We had our annual Biomet Lab Lunch at the Indian Restraurant in Berkeley.

November
Meetings

ddb gave a presentation on Accumulated Winter Chill is Decreasing in Fruit Growing Regions of California,  California Climate Change Consortium, California Department of Food and Agriculture. Modesto, CA, Nov 29, 2012.

Publications

Ryu, Y., Verfaillie, J., Macfarlane, C., Kobayashi, H., Sonnentag, O., Vargas, R., Ma, S., Baldocchi, D.D., 2012. Continuous observation of tree leaf area index at ecosystem scale using upward-pointing digital cameras. Remote Sensing of Environment 126, 116-125.

Chen, X., Miller, G.R., Rubin, Y., Baldocchi, D.D., 2012. A statistical method for estimating wood thermal diffusivity and probe geometry using in situ heat response curves from sap flow measurements. Tree Physiol. doi 10.1093/treephys/tps100

Raz-Yaseef, N, Koteen, L, Baldocchi, DD, Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar, which has been submitted for possible publication in Journal of Geophysical Research - Biogeosciences. accepted, in press

October
Meetings

Jaclyn Hatala attended the RCN Forecast conference on Promoting New Perspectives in Data Assimilation in Global Change Science at Woods Hole

Publications

Baldocchi, D.D. Ma, S. How Will Land Use Affect Air Temperature in the Surface Boundary Layer?: Lessons Learned from a Comparative Study on the Energy Balance of an Oak Savanna and an Annual Grassland in California, USA . Tellus B, submitted

Staff News

Naama Raz-Yaseef is leaving the Biomet Lab and taking a new postdoc at LBL to study the Arctic Tundra..Thanks Naama

Caption: Siyan Ma, Laurie Koteen, Naama Raz Yaseef, Sara Knox, Dennis Baldocchi, Melanie Hahn, Joe Verfaillie, Martin Beland, Sebastian Wolf, missing Jaclyn Hatala

 

September
Education

Research on Trends in Fog and on Winter Chill were featured on KQED Documentary, Heat and Harvest

Meetings

ddb attended the workshop on 'The importance of land-atmosphere fluxes of methane and nitrous oxide for the global greenhouse balance' Hyytiala, Finland, Sept 4-7, 2012

Publications

Chen, X, Miller, G, Baldocchi, D, Rubin, Y. A statistical method for estimating wood thermal diffusivity and probe geometry using in-situ heat response curves from sap flow measurements" has been accepted for publication in Tree Physiology.

Ryu, Y., Verfaillie, J., Macfarlane, C., Kobayashi, H., Sonnentag, O., Vargas, R., Ma, S., Baldocchi, D.D., 2012. Continuous observation of tree leaf area index at ecosystem scale using upward-pointing digital cameras. Remote Sensing of Environment 126, 116-125.

Koteen, L., Baldocchi, D., 2012. A randomization method for efficiently and accurately processing fine roots, and separating them from debris, in the laboratory. Plant Soil, 1-16.

August
Publications

Raz-Yaseef, N, Koteen, L, Baldocchi, DD, Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar, which has been submitted for possible publication in Journal of Geophysical Research - Biogeosciences. submitted

Ryu, Youngryel, Joseph Verfaillie; Craig MacFarlane; Hideki Kobayashi; Oliver Sonnentag; Rodrigo Vargas; Siyan Ma; Dennis Baldocchi. Continuous observation of tree leaf area index at ecosystem scale using upward-pointing digital. Cameras. Remote Sensing of the Environment. accepted for publication

Schwalm, C.R., Williams, C.A., Schaefer, K., Baldocchi, D., Black, T.A., Goldstein, A.H., Law, B.E., Oechel, W.C., Paw U, K.T., Scott, R.L., 2012. Reduction in carbon uptake during turn of the century drought in western North America. Nature Geosci 5, 551-556.

July
Meetings

ddb lectured on canopy modeling at the 5th annual Flux Course in Colorado. View the YouTube video

Publications

Knox, S. H., S. K. Carey, and E. R. Humphreys. 2012. Snow surface energy exchanges and snowmelt in a shrub-covered bog in eastern Ontario, Canada. Hydrological Processes 26:1877-1891.

Williams, C. A., M. Reichstein, N. Buchmann, D. Baldocchi, C. Beer, C. Schwalm, G. Wohlfahrt, N. Hasler, C. Bernhofer, T. Foken, D. Papale, S. Schymanski, and K. Schaefer. 2012. Climate and vegetation controls on the surface water balance: Synthesis of evapotranspiration measured across a global network of flux towers. Water Resources Research 48:W06523.

H. Yan, S.Q. Wang, D. Billesbach, W. Oechel, J.H. Zhang, T. Meyers, T.A. Martin, R. Matamala, D. Baldocchi, G. Bohrer, D. Dragoni, R. Scott Global estimation of evapotranspiration using a leaf area index-based surface energy and water balance model. Remote Sensing of Environment 2012 124, doi:10.1016/j.rse.2012.06.004 . Pages 581-595

Baldocchi, D. 2012. Gas and energy fluxes across landscapes. In Encyclopedia of Theoretical Ecology. Eds. Alan Hastings and Lou Gross. University of California Press, Berkeley. Pp337-339

June
Meetings

Jaclyn Hatala gave presentation on Landscape-scale drivers of carbon dioxide and methane flux in agricultural and restored peatlands in the Sacramento-San Joaquin Delta, USA at the 14th International Peat Congress in Stockholm Sweden

ddb gave presentation on Biosphere-Atmosphere Interactions: Issues, Observations and Technology. at the Lower Atmospheric Observing Facilities Workshop. Meeting the Challenges of Climate System Science 18-19 June 2012, Boulder CO USA

ddb attended the Gordon Conference on Biogenic Hydrocarbons at Bates College, Lewiston, Maine and gave a presentation on Modeling and Measuring Biogenic Hydrocarbon (C5H8 & CH4) Fluxes

Other

Youngryel Ryu, a former Biomet Grad student will receive a 2011 Editors' Citation for Excellence in Refereeing for Global Biogeochemical Cycles.

Proposals

A team of scientists led by Margaret Torn of Lawrence Berkely National Lab won the competition for The AmeriFlux Network Management Project from the Department of Energy. Co-Investigators include Deb Agarwal and Dennis Baldocchi. Lead investigators include Bev Law, Marty Humphrey, Dario Papale, Steve Wofsy, and Dave Billesbach. The project will provide long term support for a core group of long term AmeriFlux towers, spread across ecological and climate zones in the US.

Publications

Baldocchi, D. Reichstein, M, Papale, D, Koteen, L. Vargas, R. Agarwal, D., Cook, R. 2012. Role of Flux Networks in Biogeosciences. EOS. 93,217-218.

Ryu, Youngryel, Joseph Verfaillie; Craig MacFarlane; Hideki Kobayashi; Oliver Sonnentag; Rodrigo Vargas; Siyan Ma; Dennis Baldocchi. Continuous observation of tree leaf area index at ecosystem scale using upward-pointing digital. Cameras. Remote Sensing of the Environment. submitted

Visitors

Jess Parker from Smithsonian Institute visited the lab and collaborated with Martin Beland to measure canopy structure with a hand held lidar system

May
Meetings

DDB and Sebastian Wolf attended the 30th Conference on Agricultural and Forest Meteorology in Boston.

Papers presented by the Biomet Lab include

On eddy covariance measurements of methane flux across a catena of land use types (drained peatland pasture, rice and restored wetland) in the Sacramento-San Joaquin Delta, Dennis D. Baldocchi, University of California at Berkeley, Berkeley, CA; and J. Hatala, J. Verfaillie, and M. Detto

Link to Presentation

Response of ecosystem carbon and water dynamics to spring drought in Switzerland, Sebastian Wolf, L. Merbold, W. Eugster, C. Ammann, and N. Buchmann

Reunion with former postdocs, Liukang Xu, Matthias Falk and Jianwu Tang

Publications

A paper on the role of flux networks in biogeosciences was accepted as a feature article in EOS

Research

We are now operating 5 flux towers in the Sacramento-San Joaquin delta measuring methane, carbon dioxide and water vapor fluxes. We have the baseline pasture and newly restored wetland on Sherman Island and the rice and old wetland on Twitchell Island. We also deployed a movable flux station on the back of a 1992 pickup truck to measure spatial fields of trace gas fluxes on the wetland.

Visitors

Greg Asner from the Carnegie Institute of Washington

April
Meetings

ddb gave presenation on Measuring and Interpreting Fluxes of Trace Gases Across Local and Global Networks A Nexus between Biometeorology and Engineering at the Center for Information Technology Research in the Interest of Society, CITRIS, seminar http://citris-uc.org/news/RE_spring_2012: YouTube Link

Siyan Ma attended the Department of Energy Meeting on Terrestrial Ecosystem Processes in Washington DC

Publications

Publlished

Hatala, J. A., M. Detto, and D. D. Baldocchi (2012), Gross ecosystem photosynthesis causes a diurnal pattern in methane emission from rice, Geophys. Res. Lett., 39(6), L06409.

Detto, M., A. Molini, G. Katul, P. Stoy, S. Palmroth, and D. Baldocchi (2012), Causality and Persistence in Ecological Systems: A Nonparametric Spectral Granger Causality Approach, The American Naturalist, 179(4), 524-535.

Submitted

Dennis Baldocchi, Markus Reichstein, Dario Papale, Laura Koteen, Rodrigo Vargas, Deb Agarwal, Robert Cook. Role of Flux Networks in Biogeoscience. EOS

Hideki Kobayashi; Youngryel Ryu; Dennis Baldocchi; Jon Welles; John NormanOn the correct estimation of gap fraction: how to remove scattered radiation in the gap fraction measurements? Agricultural and Forest Meteorology. Submitted

Rodrigo Vargas, Oliver Sonnentag, Gab Abramowitz, Arnaud Carrara , Jing Ming Chen, Philippe Ciais, Alexandra   Correia, Trevor F. Keenan, Hideki Kobayashi, Jean - Marc Ourcival , Dario Papale, David   Pearson, Joao S. Pereira, Shilong Piao , Serge Rambal, Dennis D. Baldocchi. How drought conditions influence simulated ecosystem fluxes: a model-data meta-analysis   Ecosystems

Visitors

Ben McDonald from CSIRO Australia visited and discussed measuring greenhouse gas fluxes over rice

March
Publications

Raz-Yaseef, N., D. Yakir, G. Schiller, and S. Cohen (2012), Dynamics of evapotranspiration partitioning in a semi-arid forest as affected by temporal rainfall patterns, Agricultural and Forest Meteorology, 157(0), 77-85.

Detto, M., A. Molini, G. Katul, P. Stoy, S. Palmroth, D. Baldocchi. 2012 Causality and Persistence in Ecological Systems: A Nonparametric Spectral Granger Causality Approach, The American Naturalist, Early view

on line

Hatala, J. Detto, M. Baldocchi. Gross ecosystem photosynthesis causes a diurnal pattern in methane emission from rice Geophysical Research Letters. Accepted for Publication

Linked at: http://www.agu.org/journals/gl/papersinpress.shtml#id2012GL051303

February
Meetings

ddb participated in the Dept of Energy's BERAC (Biological and Environmental Research Advisory Committee) meeting in Washington, DC

Publications

Hatala, J. A., M. Detto, O. Sonnentag, S. J. Deverel, J. Verfaillie, and D. D. Baldocchi (2012), Greenhouse gas (CO2, CH4, H2O) fluxes from drained and flooded agricultural peatlands in the Sacramento-San Joaquin Delta, Agriculture, Ecosystems and Environment, 150(0), 1-18.

Papale, D. Dario Papale, Deborah A. Agarwal, Dennis Baldocchi, Robert B. Cook and Joshua B. Fisher Catharine van Ingen. 2012. Database Maintenance, Data Sharing Policy, Collaboration. In: Eddy Covariance: A Practical Guide to Measurement and Data Analysis.. Editors. M Aubinet, D. Papale. Springer pp 399-424

Wolf, S., W. Eugster, C. Potvin, and N. Buchmann (2011), Strong seasonal variations in net ecosystem CO2 exchange of a tropical pasture and afforestation in Panama, Agricultural and Forest Meteorology, 151(8), 1139-1151.

Staff News

Martin Beland joined the Biometeorology Lab as a Postdoctoral Fellow from Fonds de recherche du Québec – Nature et technologies

Visitors

Paolo D'Odorico from the University of Virginia, before his lecture for the BASC symposium

Sonia Wharton, LLNL,and Matthias Falk, UC Davis, to discuss plans to measure pbl characteristics at Tonzi

January
Meetings

ddb reviewed the Max Planck Institute for Biogeochemistry in Jena, Germany as a member of the Science Advisory Board.

Publications

Ryu, Y.#, Baldocchi, D.D., Kobayashi, H.*, van Ingen, C., Li, J., Black, T.A., Beringer, J., van Gorsel, E., Knohl, A., Law, B.E., Richardson, A.D., Roupsard, O.. 2011. Integration of MODIS land and atmosphere products with a coupled-process model to estimate gross primary productivity and evapotranspiration from 1 km to global scales. Global Biogeochemical Cycles. 25 :GB4017

Ma, S., D. D. Baldocchi, J. A. Hatala, M. Detto, and J. Curiel Yuste. 2012. Are rain-induced ecosystem respiration pulses enhanced by legacies of antecedent photodegradation in semi-arid environments? Agricultural and Forest Meteorology 154–155:203-213.

Jaclyn A Hatala; Matteo Detto; Oliver Sonnentag; Steven J Deverel; Joseph Verfaillie; Dennis D Baldocchi. Greenhouse gas (CO2, CH4, H2O) fluxes from drained and flooded agricultural peatlands in the Sacramento-San Joaquin Delta. Agricultural Ecosystems and Environment. Accepted for publication

         
    This material is based upon work supported by the National Science Foundation and US Department of Energy. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the supporters.