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News 2016

August
Publications

The FLUXNET2015 Dataset: The longest record of global carbon, water, and energy fluxes is updated" by listed authors Gilberto Pastorello, Dario Papale, Housen Chu, Carlo Trotta, Deb Agarwal, Eleonora Canfora, Dennis Baldocchi, and Margaret Torn submitted to EOS

Fluxes All of the Times? A Primer on the Temporal Representativeness of FLUXNET. Housen Chu, Dennis Baldocchi , Ranjeet John , Sebastian Wolf , Markus Reichstein. submitted to Journal of Geophysical Research, Biogeosciences

Wang, J., X. M. Xiao, P. Wagle, S. Y. Ma, D. Baldocchi, A. Carrara, Y. Zhang, J. W. Dong, and Y. W. Qin. 2016. Canopy and climate controls of gross primary production of Mediterranean-type deciduous and evergreen oak savannas. Agricultural and Forest Meteorology 226:132-147. dx.doi.org/10.1016/j.agrformet.2016.05.020

Research

The Biomet lab and the Silver Lab went to Bouldin Island to meet with farm managers to explore new flux sites on deep carbon peat over alfalfa and took measurements of soil C and bulk density profiles.  This will be an exciting treatment where we hope the C in the peat is twice that of the soils on Twitchell Island, allowing us to explore the roles of soil C on net and gross C fluxes. 

We set up a new flux tower on Bouldin Island on a deep peat alfalfa field as part of dwr funding

Visitors

Markus Reichstein gave a lab presentation on Towards Global Data-Driven Earth Science

Alessandro de Araujo from Embrapa Brasil visited and gave a seminar on the trials and tribulations of measuring and interpreting eddy covariance fluxes over Amazonia forests.

Prof. Isabel Reche from the University of Granada will be resident in the Biomet for the 2016-2017 academic year

 

July
Meetings

ddb taught at the 9th Flux Course at Niwot Ridge, CO

Publications

AGRFORMET-D-16-00235R1, Slow ecosystem responses conditionally regulate annual carbon balance over 15 years in Californian oak-grass savanna, by Siyan Ma, Dennis D Baldocchi,  Sebastian Wolf, Joseph Verfaillie has been published on line in Agricultural and Forest Meteorology http://www.sciencedirect.com/science/article/pii/S0168192316303422

Poindexter et al GRL paper was featured in Nature News and Views

 

Research

Funds from the Department of Water Resources Contract to study greenhouse gas exchange across the delta, with the Silver Lab, finally arrived on campus.

Visitors

Tyler Anderson came to speak and discuss a new idea for a tunable diode laser spectrometer water vapor sensor.  A very innovative discussion

FLUXNET-LBL team of Trevor Keenan, Margaret Torn, Deb Agarwal and Gilberto Pastorello came to discuss considering the Kok effect in flux partitioning and the release of the most recent (July) version of the FLUXNET 2015 dataset

Dario Papale from University of Tuscia visited as part of the FLUXNET data release.

June
Meetings

ddb served on the science advisory board of the Helmholtz Research Program on Atmosphere and Climate at the Karlsruhe Institute of Technology, June 2-3, 2016

Housen Chu, Elke Eichelmann and Kyle Hemes attended the 32nd Agricultural and Forest Meteorology Conference in Salt Lake City.  

Housen gave a talk on:  Cross site evaluation of methods for the estimation of aerodynamic roughness parameters from flux tower data.

Elke presented a poster on: A comprehensive error analysis for eddy covariance measurements

 

 

Proposals

Proposal on Benchmarking Carbon Cycle and Land-Atmosphere Models with Data from a Global Flux Network, FLUXNET, with Deb Agarwal, Margaret Torn, Marty Humphrey, Dario Papale, Markus Reichstein and Bill Riley, submitted to NASA ROSES call

 

Publications

Poindexter, C. M., D. D. BaldocchiJ. H. MattheS. H. Knox, E. A. Variano. 2016. Overlooked methane transport process controls significant portion of a wetland's methane emissions. Geophysical Research Letters. doi: 10.1002/2016GL068782.

Staff News

Delta research featured on PBS News Hour

 

Visitors

Biomet lab help host a field trip of a group (~25) CA Dept of Fish and Wildlife at the Delta Field sites, June 8

Visitors

Markus Reichstein, from Max Planck Institute for Biogeochemistry, Jena, Germany, will be visiting the Biomet Lab for the next 6 weeks of this summer.

May
Meetings

ddb gave a seminar on Evaluating Evaporation Everywhere, All of the Time: Lessons Learned about Ecosystem Evaporation from Long-Term, Global Flux Networks. Massachusetts Institute of Technology, Environmental Science Seminar, May 5, 2016.

ddb gave a presentation at the symposium on California Climate Change Scoping Plan: Role of Agriculture. University of California Center, Sacramento

Publications

AGRFORMET-D-15-00809R2, Canopy and climate controls of gross primary production of deciduous and evergreen oak savannas under the Mediterranean climate, by Jie wang; Xiangming Xiao; Pradeep Wagle; Siyan Ma; Dennis  Baldocchi; Arnaud  Carrara; Yao Zhang; Jinwei Dong; Yuanwei Qin, has been accepted for publication in Agricultural and Forest Meteorology.

Staff News

Sara Knox finished her Ph.D. Congratulations. Here dissertation is on Assessing the Impacts of Land Use Change and Ecological Restoration on CH4 and CO2 Fluxes in the Sacramento San Joaquin Delta, California: Findings from a Regional Network of Eddy Covariance Towers

Brian Su, an undergraduate EECS major, gave a presentation on his application of machine learning methods to predict fluxes of mass and energy from a wetland

Ian Utz, an undergraduate ES major, gave a presentation on his study of the role of phytoplankton on assimilation of the wetland.

 

Housen Chu was a cited referee by Journal of Geophysical Research, Biogeoscience.  Congratulations

April
Meetings

ddb gave a presentation on Implications on the True Cost of Water on California Agriculture at the True Cost of Food Conference in San Francisco

ddb gave a presentation on Ameriflux's role in building community infrastructure: observations, data and models at the DOE ESS annual PI meeting, Potomac, MD

Publications

published

Knox, S. H., J. H. Matthes, C. Sturtevant, P. Y. Oikawa, J. Verfaillie, and D. Baldocchi. 2016. Biophysical controls on interannual variability in ecosystem-scale CO2 and CH4 exchange in a California rice paddy. Journal of Geophysical Research: Biogeosciences: doi 10.1002/2015JG003247.

Wolf, S., T. F. Keenan, J. B. Fisher, D. D. Baldocchi, A. R. Desai, A. D. Richardson, R. L. Scott, B. E. Law, M. E. Litvak, N. A. Brunsell, W. Peters, and I. T. van der Laan-Luijkx. 2016. Warm spring reduced carbon cycle impact of the 2012 US summer drought. Proceedings of the National Academy of Sciences. doi: 10.1073/pnas.1519620113

Baldocchi, D., S. Knox, I. Dronova, J. Verfaillie, P. Oikawa, C. Sturtevant, J. H. Matthes, and M. Detto. 2016. The impact of expanding flooded land area on the annual evaporation of rice. Agricultural and Forest Meteorology 223:181-193doi:10.1016/j.agrformet.2016.04.001

submission of papers to:

Agricultural and Forest Meteorology Siyan Ma, Dennis D Baldocchi, Sebastian Wolf,  Joseph Verfaillie, Long-term responses in ecosystems CO2 fluxes over 15 years in Californian oak-grass savanna.

Journal of Geophysical Research - Biogeoscience manuscript 2016JG003438, Introducing a biogeochemical model for estimating CO2 and CH4 exchange in restored wetlands, Oikawa, Sturtevant, Hatala, Knox, Verfaillie, Baldocchi

Geophysical Research Letters, manuscript 2016GL068782, Overlooked methane transport process controls significant portion of a wetland's methane emissions, Poindexter, Variano, Knox, Baldocchi

 "Revisiting the Partitioning of Net Ecosystem Exchange of CO2 into Photosynthesis and Respiration with Simultaneous Flux Measurements of 13CO2 and CO2, Soil Respiration and a Biophysical Model, CANVEG"
Patricia Yoshino Oikawa, PhD; Cove Sturtevant, PhD; Sara H Knox; Joseph Verfaillie; Yi-wen Huang; Dennis D Baldocchi, PhD, Agricultural and Forest Meteorology,  AGRFORMET-D-16-00264.

March
Meetings

ddb participated in the spring Biological and Environmental Research Advisory Committee (BERAC) for DOE in Gaithersberg, MD. charges to the committee are to revisit and advance the grand challenges for DOE BER for the next 20 years.  Presentations on BER research from all the National Labs were presented to the committee. and and update on NGEE Tropics

ddb gave a plenary talk on Using a Hierarchy of Modeling Approaches to Mine a Rich Dataset of Greenhouse Gas Fluxes Measurements: Experiences Derived from a Meso-network of Agricultural and Restored Wetland Sites in the Peat-Rich Delta of California at the Austin International Conference on Soil Modeling

Publications

*Warm spring reduced carbon cycle impact of the 2012 US summer drought*" Wolf et al. PNAS, accepted

Staff News

Kyle Hemes will be awarded a Delta Science Program and California Sea Grant for his proposal titled “Restoring the Sacramento-San Joaquin Delta Peatlands: A complete biogeochemical assessment of climatic impacts” .  Congratulations

February
Meetings

Sara Knox gave a presentation onAssessing the impacts of land-use change and ecological restoration on CH4 and CO2 fluxes in the Sacramento-San Joaquin Delta, California: findings from a regional network of eddy covariance towers at USGS in Menlo Park

Publications

Anderson, F. E., B. Bergamaschi, C. Sturtevant, S. Knox, L. Hastings, L. Windham-Myers, M. Detto, E. L. Hestir, J. Drexler, R. L. Miller, J. H. Matthes, J. Verfaillie, D. Baldocchi, R. L. Snyder, and R. Fujii. 2016. Variation of energy and carbon fluxes from a restored temperate freshwater wetland and implications for carbon market verification protocols. Journal of Geophysical, Biogeoscience doi: 10.1002/2015JG003083

Sturtevant, C, B.L. Ruddell, S.H. Knox, J.Verfaillie, J.J. Mathes, P.Y. Oikawa, D. Baldocchi. 2016. Identifying scale emergent, non-linear, asynchronous processes of wetland methane exchange. J. Geophysical Res. Biogeosci, 121, 188-204, doi:10.1002/2015JG003054.

Knox et al .Biophysical controls on interannual variability in ecosystem scale CO2 and CH4 exchange in a California rice paddy" [Paper #2015JG003247R], accepted for publication in Journal of Geophysical Research - Biogeosciences. 

Visitors

Christian Frankenberg from CalTech/JPL visited and discussed fluorescence and photosynthesis.  He as also a featured speaker for the annual BASC symposium

Ralph Cicerone, National Academy of Science, visited to discuss methane fluxes from rice and wetlands. Ralph was on campus giving this years Hitchcock lectures.

January
Publications

Oak Woodlands (Frank W. Davis, Dennis D. Baldocchi, and Claudia M. Tyler) In Ecosystems of California. Harold Mooney and Erika Zavaleta (Editors) Hardcover, 1008 pages ISBN: 9780520278806January 2016

Visitors

Frank Anderson, USGS, came by and gave a lab seminar on greenhouse gas fluxes from the Suisun Marsh

Jan Krebich, from Goettingen University, is a visiting graduate student during the Spring, 2016 semester. He will work on assessing soil CO2 profiles and fluxes from the grassland and savanna sites.

         
    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.