The deadline for abstract submission is 4 August 2011. For general meeting information please see AGU 2011 website
*Note that AGU enforces its deadlines without exceptions or special considerations.
Sessions relevant to FLUXNET (This page is being updated and more sessions will be added soon)
Number
Title
A02:
Advances in Atmospheric Inverse Modeling of Land-Atmosphere Exchange Processes
This session focuses on inverse modeling frameworks that investigate land-atmosphere exchange processes using atmospheric measurements as a constraint. Highlighted topics include, but are not limited to, studies targeting biospheric and anthropogenic greenhouse gas fluxes across scales, coupling to biogeochemical models, and sensitivity studies, for example, on atmospheric transport and model resolution. We particularly seek contributions that (i) employ novel statistical and data assimilation techniques for atmospheric inversions; (ii) provide insight into bottom-up, process-based model formulation based on the atmospheric constraint; and (iii) present recent developments in greenhouse gas budget estimates.
Convener:
Mathias Goeckede,
High cross
mathias.goeckede@oregonstate.edu;
Abhishek Chatterjee,
Univ of Michigan AA
_abhishch@umich.edu;
Kimberly Mueller,
University of Michigan EWRE
kimlm@umich.edu;
Sharon Gourdji
U of Michigan
sharongourdji@gmail.com.
Biogeosciences
B04:
Advances in Environmental Sensing Technologies to Study Ecosystem Structure, Functioning and Services
Advances in environmental sensing technologies offer novel possibilities to study many above- and below ground ecosystem processes across a wide spectrum of scales. Examples include wireless sensor networks, hyperspectral sensors and digital cameras. Given their advantages in terms of logistics, continuity, consistency and objectivity over traditional measurements, these technologies have the potential to become important long-term data streams for many environmental disciplines. We encourage methodological submissions and submissions that focus on the integration of environmental sensing technologies with other data streams in relation to biosphere-atmosphere feedbacks and disturbances.
Convener:
John Gamon,
University of Alberta
jgamon@gmail.com;
Oliver Sonnentag,
Harvard University
oliver.sonnentag@gmail.com;
Youngryel Ryu,
Harvard University
ryuyr77@gmail.com;
Eric Graham,
UCLA
egraham@cens.ucla.edu;
Biogeosciences
B08:
Assessing Global Soil Change, Impacts on Hydrological and Ecosystem Services
Soils are at the heart of Earth?s terrestrial life support system. Soils filter water, dispose of waste, and regulate the composition of the atmosphere. Increasing anthropogenic activity is causing soil disturbance at an unprecedented rate, with consequences for the functioning of the Earth?s critical zone. This increased manipulation has resulted in soil change and degradation of soil systems. The consequence has been reduction in the natural capital provided by soils. This session will explore advances in framework development, measurements, and modelling of global soil change as it affects hydrological systems and ecosystem services relevant to the management of the Earth's critical zone.
Convener:
Daniel Richter
Duke Univ
drichter@duke.edu;
Marc Kramer
UC Santa Cruz
mkramer@es.ucsc.edu;
Steven Gorelick
Stanford University
gorelick@stanford.edu;
David Robinson
Centre for Ecology & Hydrology
darearthscience@yahoo.com.
Biogeosciences
B11:
Belowground Carbon Allocation and Retention: Frontiers in Biogeosciences and Climate Change
Belowground carbon allocation (BCA) is an important ecosystem carbon flux and plays a major role in driving biogeochemical processes such as nutrient cycling and soil C storage. This session invites contributions that further our understanding on the quantification of BCA, carbon residence time within various compartments, mechanisms of long-term carbon storage, or biogeochemical interactions with carbon allocated belowground. We welcome contributions from different spatio-temporal scales of investigation and encourage presentations from both experimental and modeling studies that focus on testing hypotheses, isolating mechanisms, and identifying knowledge gaps.
Convener:
Rodrigo Vargas,
rvargas@cicese.mx;
Erik Hobbie
erik.hobbie@unh.edu;
Niles Hasselquist
Swedish University of Agriculture Sciences (SLU)
Niles.Hasselquist@slu.se;
Richard Lucas
SLU-Swedish University of Agricultural Sciences
richard.lucas@slu.se.
Biogeosciences
B16:
Biological Disturbances and Biogeochemical Cycling
Biological disturbances such as herbivory and pathogenicity can result in large changes to vegetation dynamics and biogeochemical fluxes. Biological events may have different ecosystem consequences than other disturbances; for example, insect infestations typically are not stand replacing and the understory and soil may be left relatively undisturbed, unlike most fire and harvesting events. Climate change is expected to increase the frequency, intensity and scale of biological disturbances in the future. We encourage measurements or modeling submissions that focus on process-level understanding on the consequences of and recovery from biological disturbance at different scales of biological organization from organism to ecosystem to region.
Convener:
David Reed,
david.edwin.reed@gmail.com;
Paul Stoy,
Montana State University
paul.stoy@montana.edu;
Biogeosciences
B17:
Biological Weathering: Carbon, Water and Nutrient Flow through Plant-Microbe-Soil Networks
The root-rhizosphere-mycorrhizal interfaces fueled by plant?s photosynthetic energy facilitate a multitude of processes, including dissolution of primary minerals, selective biotic uptake of nutrients and precipitation of neogenic mineral phases. These govern soil formation, nutrient and water availability, and sustainable ecosystem development. We seek to better understand the magnitude, the effects, and the coupling among biological, geological and chemical processes on weathering in the soil. This multi-disciplinary session invites submissions from all investigators of laboratory, field and/or modeling studies of plant-microbe-mineral interactions at various scales.
Convener:
Megan Andrews,
University of Sheffield
m . y . andrews@sheffield.ac.uk;
Zsuzsanna Balogh-Brunstad
balogh_brunz@hartwick.edu;
Richard Phillips
Indiana Univ
rpp6@indiana.edu;
Anna Rosling
Anna.Rosling@mykopat.slu.se.
Biogeosciences
B22:
Characterizing, Modeling and Extending Urban Metabolism
Urban Metabolism, a biological metaphor for the coupled biophysical and socio-economic function of cities, has been a productive framework for urban biogeophysical research for decades, and current understanding of urban metabolism is evolving rapidly. However, for Urban Metabolism to grow as a useful research framework, coupled urban biogeophysical and socio-economic systems need better understanding. We invite theoretical or applied studies spanning the spectrum of urban metabolism research. Topics of interest include urban coupled-human natural interactions, urban biogeochemistry, urban hydrology and energy budgets, and spatio-temporal modeling of urban systems that examine the limits and potential of the Urban Metabolism concept.
Convener:
Mark Friedl,
friedl@bu.edu;
Lucy Hutyra,
Boston University,
lucynko@hotmail.com;
Nathan Phillips
Boston University
nathan@bu.edu;
Stephanie Pinceti
spincetl@ioes.ucla.edu.
Biogeosciences
B29:
Effects of Water Limitations on Water and Carbon Cycling of Terrestrial Ecosystems
Ecosystem functioning is expected to be affected by global warming and the intensification of the hydrological cycle. Water-limited environments, in which the fluxes of water and carbon are tightly coupled to water availability, are considered highly vulnerable, but mesic ecosystems are likely to be affected as well. To allow accurate predictions, a more detailed understanding of water-limitations on ecosystem processes is needed. We welcome studies offering new insights on these linkages, ranging from experiments to interactions between multiple drivers of change and from empirical research through model-based approaches.
Convener:
Beverly Law,
Oregon State University
bev.law@oregonstate.edu;
Andrew Oishi
Duke University
acoishi@duke.edu;
Naama Raz-Yaseef
University of California, Berkeley
naama.ry@berkeley.edu;
Nadine Ruehr
Oregon State University
nadine.ruehr@oregonstate.edu.
Biogeosciences
B30:
Environmental Controls of Ecosystem-Atmosphere Exchanges (NEE)
This session invites abstracts from colleagues who use measurements, modeling to determine the controls of land-atmosphere exchanges from local to global scales. NEE includes cycling of carbon, water and energy. Controls of NEE include but are not limited to: extreme events including fire, bark beetles, drought, flooding, heat wave, cold wave, El Nino, La Nina, temperature, precipitation, soil moisture, forest age, and nutrient cycling. We encourage synthetic analyses of observations from the eddy-flux networks, biometric and remote sensing measurements. We also encourage contributions of using simple models to study control mechanisms or using numerical model to study feedback mechanisms or identifying an important question.
Convener:
Daniel Riccluto,
ricciutodm@ornl.gov;
Chuixiang Yi,
Queens College, CUNY,
Chuixiang.Yi@gc.cuny.edu.
Biogeosciences
B31:
Exchange Dynamics of Volatile Organic Compounds between Plant Ecosystems and the Atmosphere
Plants exchange a portion of the assimilated carbon as
volatile organic compounds with the atmosphere. These VOCs protect
plants against various stresses, mediate plant interactions with other
organisms, and play important roles in atmospheric chemistry (e.g. ozone
and secondary organic aerosol formation). Models used to simulate VOCs
emissions are parameterized using climatic data and emission factors
from measurements carried out at the leaf or canopy scales. Future
climate changes may lead to changes in VOC emissions. We encourage the
submission of contributions based on in-situ measurements and/or
modeling that improve our understanding of biosphere-atmosphere exchange
of VOCs.
Convener:
Silvano Fares,
University of California, Berk,
(510) 643-2460,
silvano.fares@entecra.it;
Kolby Jardine,
520-838-6191,
jardine@email.arizona.edu;
Pawel Misztal,
Centre for Ecology & Hydrology,
4.41314E+11,
pawel.m@ed.ac.uk.
Biogeosciences
B35:
Halogens in Terrestrial and Coastal Ecosystems
Halogens play important roles in ecosystem health. For example, increasing soil salinity from sea level rise or land use practices can degrade soils and vegetation. Longer lifetime halocarbons released to the atmosphere contribute to stratospheric ozone depletion. Also, ecosystems can remove halocarbons and organohalogens through biotic or abiotic processes. The session focuses on a) the effect of changing salinity on biogeochemical processes; b) the formation, degradation, and fate of natural and anthropogenic halocarbons, and c) the quantification of halogen transport within and across terrestrial and coastal ecosystems. The session will link scientists who are conducting diverse but overlapping research on halogen biogeochemistry.
Convener:
Alex Chow,
Clemson University
achow@clemson.edu;
Robert Rhew
UC Berkeley
rrhew@atmos.berkeley.edu.
Biogeosciences
B40:
Improving Predictions of the Global Carbon Cycle and Climate in Earth System Models: New Mechanisms, Feedback Sensitivities, and Approaches for Model Benchmarking
Global climate-carbon cycle feedbacks are poorly quantified and potentially large, and these feedbacks strongly influence predictions of future atmospheric CO2 concentrations. This session focuses on identification and quantification of feedback sensitivities; new biogeochemical and biogeophysical mechanisms affecting carbon, nitrogen, and nutrient cycles; systematic approaches for Earth System Model (ESM) evaluation and benchmarking via comparison with contemporary observations; and analysis of biosphere dynamics and responses in Coupled Model Intercomparison Project Phase 5 (CMIP5) model results.
Convener:
Forrest Hoffman,
forrest@climatemodeling.org;
Atul Jain,
jain1@uiuc.edu;
Wilfred Post
wmp@ornl.gov;
James Randerson
University of California, Berk
jranders@uci.edu.
Biogeosciences
B41:
Interacting Biogeochemical Cycles: Linking Carbon, Water, and Nutrient Fluxes From Organisms to Globe
We welcome contributions that address various aspects of interactions among carbon, water, and nutrient cycling at different spatio-temporal scales. Topics may include: drought and precipitation effects on the carbon and nitrogen cycles, biogeochemical cycle feedbacks to the water cycle, and the role of vegetation dynamics in carbon, water and nutrient cycles. Analyses using AmeriFlux or FLUXNET data are welcome, but we are also interested in both smaller and larger spatial scales and levels of integration. We encourage modeling, experimental and monitoring studies, particularly those that focus on testing hypotheses, isolating mechanisms and processes, and identifying knowledge gaps.
Convener:
Darren Drewry,
Max Planck Institute
drewryd@gmail.com;
Dario Papale,
University of Tuscia
darpap@unitus.it;
Markus Reichstein,
Max-Planck-Inst. for Biogeo.
mreichstein@bgc-jena.mpg.de;
Andrew Richardson,
Harvard University
arichardson@oeb.harvard.edu;
Rodrigo Vargas,
rvargas@cicese.mx.
Biogeosciences
B42:
Interdisciplinary Science in Critical Zone Observatories
The Critical Zone provides a holistic framework for integrated studies of the near-surface terrestrial environment. Given the growing interests in Critical Zone science and the need to demonstrate how multidisciplinary science can be synergized from the Critical Zone Observatories (CZOs) and similar environmental observatories, this session will highlight a variety of ongoing research from the greater CZO community. Novel experimental and modeling efforts and examples of cross-cutting science will be highlighted. Key approaches or steps that need to be taken or strengthened in order to achieve significant advancements will also be discussed. We welcome contributions from within and outside the CZOs around the world.
Convener:
Jan Hopmans
University at California
jwhopmans@ucdavis.edu;
Henry Lin
Penn State Univ
henrylin@psu.edu;
Frederick Scatena
fns@sas.upenn.edu;
Donald Sparks
University of Delaware
dlsparks@udel.edu.
Biogeosciences
B44:
Laser-Based Isotope Techniques in Biogeosciences
Traditionally, stable isotope compositions are quantified using Isotope Ratio Mass Spectrometry. In recent years, isotope ratio infrared spectroscopy has become available to measure D, 18O and 13C. The continuous nature of this new technology has the potential to enhance our process-based understanding of biogeochemical processes and controlling factors. We welcome submissions utilizing laser spectroscopy to expand our understanding in various fields (e.g. hydrology, biosphere-atmosphere exchange and atmospheric chemistry), with a focus on the methodology and innovative technical aspects of analysis and experimental design. We also invite discussion on the limitations and potential solutions of the laser spectroscopy isotope measurements.
Convener:
Lixin Wang,
Princeton University
w.lixin@gmail.com;
Xuhui Lee
Yale University
xuhui.lee@yale.edu;
Kelly Caylor
Princeton University
kcaylor@princeton.edu;
Richard Wehr
rawehr@email.arizona.edu.
Biogeosciences
B57:
Nitrogen Export from Headwater Catchments: Integrating Biogeochemical Processing with Hydrologic Transport
Excess nitrogen deposited within headwater catchments is largely controlled by the linkage between the biogeochemical processes altering nitrogen stocks and hydrologic transport to and through the stream network. Although many studies have identified the controlling landscape variables (e.g. vegetation; soils; climate; hillslope/riparian), we seek to explore the continued challenges including (1) linking processes that are connected in space but not necessarily time and (2) applying our theoretical understanding to predict watershed scale responses to external forcings (e.g. forest manipulation; climate change).
Convener:
Jeb Barrett,
jebarre@vt.edu;
Sheila Christopher
sheila.christopher@vt.edu;
Kevin McGuire
Virginia Tech
kevin.mcguire@vt.edu;
Durelle Scott
dscott@vt.edu;
Brian Strahm
Virginia Tech
brian.strahm@vt.edu.
Biogeosciences
B60:
Phosphorus Cycling in Terrestrial Ecosystems
Phosphorus (P) commonly limits terrestrial productivity. This limitation would be even more important in regions where anthropogenic deposits reduce nitrogen limitation. In this context, the implementation of processes governing soil P bioavailability into biogeochemical models may be necessary to predict the response of terrestrial ecosystems to global change. This session will address 1) the processes controlling soil P availability, 2) the interactions between the C, N and P cycles in the soil-plant-microorganism system and 3) the integration of soil P processes into ecosystem models. We welcome contributions from both experimental and modelling studies and encourage research focusing on the interaction between P cycling and climate change.
Convener:
Laurent Augusto,
laugusto@bordeaux.inra.fr;
Mark Bakker
Mark.Bakker@bordeaux.inra.fr
Jean-Christophe Domec
jc-domec@enitab.fr;
Anne Gallet-Budynek
INRA, UMR1220 TCEM
anne.budynek@bordeaux.inra.fr.
Biogeosciences
B61:
Plant Demography and the Carbon Cycle
Although they are often underappreciated, demographic processes mediate important biotic feedbacks to changing climate. These include changes in albedo due to shifting ecotones, changes in carbon storage due to altered mortality, or changes in carbon uptake and residence. The representation of mortality, growth, and fecundity of different species or functional types is largely absent from carbon cycle models, as are the diverse species responses and interspecific competition within plant functional groups. Nevertheless, plant demography rivals physiological processes in importance for determining the long term carbon budget. We invite abstracts exploring plant demographic processes as a control on climate feedbacks.
Convener:
William Anderegg,
anderegg@stanford.edu;
Drew Purves
dpurves@microsoft.com;
Adam Wolf
Carnegie Institution
adamwolf@princeton.edu.
Biogeosciences
B62:
Process-based Studies of Biosphere-Atmosphere Carbon and Water Fluxes in Terrestrial Ecosystems
Observation networks of ecosystem flux measurements have been established to assess the Biosphere-Atmosphere exchange of carbon and water (e.g. FLUXNET). The components of measured fluxes are crucial to understand the controlling processes, however, can only be inferred indirectly on the ecosystem level. This session will focus on the current state and new perspectives in process-based studies of ecosystem fluxes between biosphere and atmosphere. We welcome contributions presenting various approaches (experimental, stable isotopes, parameterisations, models) and scales. We especially encourage submissions that present new approaches and simultaneous partitioning of ecosystem fluxes.
Convener:
Sebastian Wolf,
ETH Zurich
sewolf@ethz.ch;
Paul Stoy
Montana State University
paul.stoy@montana.edu;
Dennis Baldocchi
baldocchi@berkeley.edu.
Biogeosciences
B65:
Remote Sensing of Long-term Ecological Trends
As the biosphere comes under
increasing pressure from short-term perturbations and more chronic
stress, long-term monitoring of ecosystem response is imperative for the
policy, management, and science communities. Remote sensing has long
been applied to these problems, but now, with key data archives reaching
critical temporal depth, and new algorithms to tap those archives
emerging, progress in monitoring capabilities is rapidly accelerating.
This session will highlight emerging tools and findings that capitalize
on dense temporal grain and long-temporal extent of satellite imagery to
identify trends in terrestrial systems, including ecosystem disturbance
and response, climate-driven shifts in vegetation communities, and
changes in phenology.
Convener:
Warren Cohen,
Oregon State University,
warren.cohen@oregonstate.edu;
Robert Kennedy,
Oregon State University,
robert.kennedy@oregonstate.edu;
Jeffrey Masek,
NASA,
jeffrey.g.masek@nasa.gov;
Randolph Wynne,
Virginia Tech,
wynne@vt.edu.
Biogeosciences
B68:
Seasonality of forest hydrology and biogeochemistry
Seasonality matters in all forests, including tropical ecosystems. Seasonal changes in environmental factors are often confounded with phenological rhythms, and together they affect hydrological processes such as precipitation partitioning, transpiration, and soil water percolation. The seasonality of biogeochemical processes determining e.g. atmospheric deposition, canopy exchange of gases and dissolved elements, and soil trace gas and nutrient fluxes does not necessarily follow the same patterns as hydrological processes. We invite contributions that examine the effect of canopy phenology on forest functioning and help disentangle the driving forces of seasonal changes in hydrological and biogeochemical processes and fluxes in forests.
Convener:
Mathias Herbst,
mh@geo.ku.dk;
Dirk H,
_dhoelsc@gwdg.de;
Jeroen Staelens
Ghent University
jeroen.staelens@ugent.be.
Biogeosciences
B69:
Soil Carbon and Nitrogen Cycles: Scaling Processes from Observations to Models
Sponsor: Biogeosciences
Meaningful model representations of terrestrial biogeochemical cycles require insight into the chemical, physical and biological drivers of soil processes, notably those controlling carbon and nitrogen stocks and fluxes. The challenge remains of how to best integrate advances in process-based understanding, which often come from small-scale and short-term field and laboratory experiments, into large-scale, long-term models. This session will focus on the challenges of scaling soil carbon and nitrogen cycle processes from observations to model representations. Our goal is to promote dialogue between experimentalists and modelers, and to foster better understanding and future collaborations.
Convener:
David Gaumont-guay,
Vancouver Island University
david.gaumont-guay@viu.ca;
Francesca Hopkins
U.C. Irvine
fhopkins@uci.edu;
Myroslava Khomik
MPI for Biogeochemistry
kmyros@bgc-jena.mpg.de;
Fernando Moyano
BIOEMCO
fernando.moyano@grignon.inra.fr.
Biogeosciences
B70:
Soil Carbon Stabilization Through Land Management: New Advances and Key Mechanisms
Much of our world?s soil carbon stocks have been depleted due to agricultural, industrial, or municipal uses. Debate persists regarding how land management practices and land-use changes might increase soil carbon content and/or carbon stabilization. We encourage contributions addressing emergent questions in this research area at molecular and ecosystem scales as well as modeling studies integrating across these scales. Examples include: What land use management/changes increase the fraction of stabilized C in soils? Are there biogeochemical predictors for the accumulation of stabilized C? Are there mineralogical differences among soils that promote long-term C storage?
Convener:
Whendee Silver,
wsilver@berkeley.edu;
Aaron Thompson
Univ Georgia
AaronT@uga.edu.
Biogeosciences
B71:
Soil Organic Matter and Climate Change
Soil carbon is the largest terrestrial carbon pool. Its forms have widely varying vulnerabilities. The balance among processes of soil organic matter (SOM) accumulation, transformation, mobilization and decomposition is a major factor in ecosystem carbon storage and greenhouse gas exchange. SOM processes are also key to cycling of nutrients needed for primary production. Despite its critical roles within ecosystems, the carbon cycle and climate system, controls on SOM balance and vulnerability to climate change remain poorly understood. This session will focus on SOM and climate change: mechanisms, processes, and vulnerabilities; modeling responses to climate change; and strategies for accurate assessment of change from the farm to the global scales.
Convener:
Nancy Cavallaro
USDA/NIFA
ncavallaro@nifa.usda.gov;
Kate Lajtha
High cross
lajthak@science.oregonstate.edu.
Biogeosciences
B73:
Stable Isotope Fluxes in the Carbon and Water Cycles of Terrestrial Ecosystems
Stable isotopes help relate processes and fluxes of water and carbon in terrestrial environments. Novel measurement techniques now discern isotopic signals in ecosystems with exceptional detail, facilitating the development and validation of models and concepts that link plants, soils, and the atmosphere through the water and carbon cycles. We welcome contributions addressing the application of stable isotopes (e.g., 13C, 18O and D) in field and laboratory experiments and in the development of models and conceptual theory, with a focus on the insights gained into ecosystem processes. The scope extends from natural abundance studies to labeling experiments.
Convener:
Matthias Zeeman,
High Cross
mjzeeman@coas.oregonstate.edu;
Richard Wehr
rawehr@email.arizona.edu;
Kelly Caylor
Princeton University
kcaylor@princeton.edu.
Biogeosciences
B75:
The Carbon Cycle on the Arid Land: Impacts of Climate Change and Human Activity
About 35% of Earth’s surface is characterized as either arid or semi-arid. Although soil organic carbon (SOC) is low, soil inorganic carbon (SIC) is high. There is evidence of significant CO2 uptake on arid and semi-arid land, which suggests that the arid and semi-arid zones are potential carbon sinks. This session provides a forum for discussions of relevant research outcomes. Topics include, but are not limited to (1) CO2 concentration and efflux under different land uses and managements, (2) impact of climate change and human activity on SOC and SIC dynamics, and (3) carbon sequestration potential in arid/semi-arid zone. We encourage submission of contributions using observational and modeling approaches
Convener:
Changhui Peng,
UQAM
peng.changhui@uqam.ca;
Xiujun Wang
University of Maryland
wwang@essic.umd.edu;
Jianbin Zhou
Northwest A&F University
jbzhou@nwsuaf.edu.cn.
Biogeosciences
B77:
The Priming Effect of Soil Organic Matter Decomposition: Theory, Observations and Modeling
Carbon storage in soils and nutrient release to plants are governed by decomposition of soil organic matter (SOM) pools. While classical views and modeling approaches emphasize abiotic factors and SOM chemistry, biological and physico-chemical stabilization mechanisms also play key roles. The so-called priming effect links inputs of labile carbon to stimulated decomposition of older SOM pools. SOM priming may be driven by rhizosphere microbes and may mediate nutrient availability in the rooting zone. The priming effect could become more important as biogeochemical cycles are perturbed with climate change. This session invites observational, theoretical and modeling studies of SOM priming.
Convener:
Elise Pendall,
Univ Wyoming
pendall@uwyo.edu;
Markus Reichstein
Max-Planck-Inst. for Biogeo.
mreichstein@bgc-jena.mpg.de
Biogeosciences
B80:
Understanding Controls and Lags in Soil Trace Gas Dynamics
Soil trace gas datasets are increasingly revealing complex temporal dynamics that are challenging to explain. Soil CO2 efflux, for instance, appears to respond to several drivers that covary on similar timescales, including temperature, wind, moisture, and photosynthate supply. In addition to an excess of explanatory variables, effluxes can also have lagged responses to drivers. We welcome submissions offering new insights into the significance of efflux dynamics (rates and isotopic composition). Relevant issues include 1) identifying lags between drivers and efflux responses, 2) distinguishing biological and soil physical controls on effluxes, and 3) describing dynamics with probabilistic and mechanistic models.
Convener:
Jonathan Martin,
jonathan.martin@oregonstate.edu;
Claire Phillips
Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory
claire.phillips@llnl.gov;
Nadine Ruehr
Oregon State University
nadine.ruehr@oregonstate.edu.
Biogeosciences
C09:
Dynamics of Permafrost Degradation – Impacts and Feedbacks
Permafrost underlies 24% of the Earth’s land surface with thermokarst processes affecting ice-rich terrain. We solicit papers reflecting current knowledge of permafrost degradation dynamics, including impacts of disturbance and climate change, and resulting climate feedbacks. Submissions are welcome from a range of permafrost-climate dynamics topics, including remote sensing of permafrost degradation (satellite, airborne, ground-based, geophysics); field-based or modeling process studies; cryolithologic / paleoenvironmental studies; biogeochemistry; geomorphologic / ecohydrologic feedbacks; landscape-scale modeling; integration of permafrost degradation into land surface and carbon cycle models; and probabilistic risk assessments.
Convener:
Cynthia Dinwiddie,
Southwest Research Institute
cdinwiddie@swri.org;
Sarah Godsey
seg19@psu.edu;
Guido Grosse
University of Alaska Fairbanks
ggrosse@gi.alaska.edu;
Anna Liljedahl
UAF
akliljedahl@alaska.edu.
Biogeosciences
ED48:
Teaching Surface Process Science: Ideas, Innovations and Lessons
Research in interdisciplinary surface process science is blossoming, as we become increasingly concerned with Earth?s ?Critical Zone'. Surface process science happens at spatial and temporal scales readily accessible to students. It relates directly to climate change issues and offers abundant opportunities to build connections among quantification, science concepts and prediction. Yet, many Earth science curricula, across the K-16 spectrum, touch only lightly on this zone of the Earth, the one that most directly supports life. This session welcomes contributions from across the AGU communities that explore innovative ways to use surface process science to engage students and teachers in learning about the Earth.
Convener:
Karen Campbell,
St Anthony Falls Lab
kmc@umn.edu;
Gillian Roehrig
roehr013@umn.edu.
Biogeosciences
EP19:
Post-Eruptive Processes Operating on Volcanic Landscapes
In volcanic terrains, landscape evolution is set by volcanic inputs and subsequent geomorphic, hydrologic, and ecologic modifications. Volcanic events significantly disrupt landscapes: explosive activity blankets large areas with tephra, effusive activity repaves regions with lava, and syn-eruptive processes can actively erode and modify the terrain. Following an eruption, numerous abiotic and biotic processes respond to the disturbance. We solicit papers examining all aspects and spatial and temporal scales of post-eruptive processes operating on volcanic landscapes, in particular studies on weathering and remobilization of volcanic products, soil development, and biologic response in a range of volcanic and climatic settings.
Convener:
Katharine Cashman,
University of Oregon
cashman@uoregon.edu;
Oliver Chadwick
Univ California
oac@geog.ucsb.edu;
Natalia Deligne
University of Oregon
ndeligne@uoregon.edu;
Gordon Grant
USDA Forest Service
gordon.grant@oregonstate.edu.
Biogeosciences
EP22:
Soil Erosion Across Time, Space and Climate
Land degradation is important at a wide range of time and space scales; in the short term as an agronomic issue and in the long term as a major process of landform evolution. The many agronomic models do not adequately address the mechanisms by which runoff and sediment transport are generated across the full range, and there is no satisfactory reconciliation across the time-scales of interest. As climates change and land use adapts, sediment loss and consequent soil evolution become increasingly critical global issues. Challenges include the complexity and hierarchy of interactions, the high level of spatial heterogeneity of soil properties and precipitation and uncertainties in data, spatial parameterization and process understanding.
Convener:
Saskia Keestra
saskia.keestra@wur.nl;
Michael Kirkby
University of Leeds
m . j . kirkby@leeds.ac.uk;
Ana Tarquis
Universidad Polit?cnica de Madrid
anamaria.tarquis@upm.es.
Biogeosciences
EP28:
Scaling and Feedbacks among Water, Life, and Landforms
Water and life play a central role in the processes that create and modify landforms. Scaling laws are commonly observed in water (e.g. frequency-magnitude relationships of floods), life (e.g. species-area relationships), and landform (e.g. the fractal nature of drainage networks) phenomena, yet how these scaling laws relate to one another is not well understood. This session will bring together researchers seeking to understand the emergent/self-organized scaling behaviors (and breaks in scaling) among water, life, and landforms and how water, life, and landform processes interact and feed back on one another over a wide range of spatial and/or temporal scales.
Convener:
Shirley Papuga,
University of Arizona
shirley.papuga@gmail.com;
Sally Thompson,
Duke University
set8@duke.edu;
Jon Pelletier
University of Arizona
jdpellet@email.arizona.edu;
Kelly Caylor
Princeton University
kcaylor@princeton.edu;
Biogeosciences
GC26:
Permafrost and Methane 3. Vulnerability of Permafrost Carbon to Climate Change
Permafrost zone soils contain 1670 Pg of carbon (C). Permafrost degradation can change ecosystem C storage by enhancing microbial activity and ecosystem respiration, but can also stimulate plant growth and increase C stored in vegetation and surface soil. This session invites papers that examine factors causing losses and gains in ecosystem C storage in particular that relate to the question: What is the magnitude, timing and form of C release from permafrost zone ecosystems to the atmosphere in a changing climate? Papers may address any aspect of this topic from microbial communities to the global scale, using a range of measurements or modeling to detect and forecast permafrost thaw and the influence on the C cycle and future climate.
Convener:
Kevin Schafer
kevin.schaefer@nsidc.org;
Edward Schuur
tschuur@ufl.edu.
Biogeosciences
GC56:
Bridging Ecosystem Science to Services and Stewardship
Managing global change requires new types of ecosystem science, research frameworks, funding instruments, integrative tools and partnerships. The session goal is to assess how research can be structured to provide scientific results on complex ecosystem and landscape processes, information to advise stakeholders about sustainable long-term investments, the means for linking scientific evaluations with regional management, and information on complex flow networks, that provide theoretical insight with respect to regional system resilience and sustainability. We invite presentations that provide examples of cross-disciplinary linkages and new methodologies to support stewardship, adaptive governance and sustainability at regional scales.
Convener:
Joon Kim,
Seoul National University
joon@snu.ac.kr;
John Tenhunen,
University of Bayreuth,
john.tenhunen@uni-bayreuth.de.
Biogeosciences
H02:
Landscape System Response under Change
Changes in climate, land use, and society provoke responses in the coupled physical, biological, and chemical processes of the landscape. Depending on the scale and severity, such changes can lead to hydrogeomorphic extremes, alter ecosystem disturbances and rates of ecosystem functions that could amplify or dampen extremes. Understanding and predicting the whole landscape system response is critical for managing environmental resources and mitigating risks. This session welcomes process and predictive studies that relate a range of watershed phenomenon including critical zone observations, eco-hydro-geomorphic patterns and fluxes, and modeling studies designed to explore feedbacks, nonlinearities, and tipping points of landscapes dynamics across scales.
Convener:
Erkan Istanbulluoglu,
Univ Washington
erkani@u.washington.edu;
Craig Rasmussen
crasmuss@cals.arizona.edu;
Kelly Caylor
Princeton University
kcaylor@princeton.edu;
Thomas Raab
BTU Cottbus
raab@tu-cottbus.de;
Valeriy Ivanov
U of Michigan
ivanov@umich.edu;
Peter Troch
US Geological Survey
patroch@hwr.arizona.edu;
Werner Gerwin
werner.gerwin@tu-cottbus.de.
Biogeosciences
H03:
Digital Soil Mapping and Hydro-Ecological Modeling
Soil spatial information is critical for hydro-ecological modeling at the mesoscale watershed level. Soil maps from conventional soil surveys are often too coarse. Digital soil mapping (DSM) provides the potential. Current development of DSM methods has little linkage to hydro-ecological modeling. Many of the issues concerning hydro-ecological modeling have not been addressed. In this session we intend to gauge the state-of-the-art in digital soil mapping for hydro-ecological modeling. Topics include, but are not limited to, provision of key model soil inputs, use of sparse soil samples and legacy soil data, effective sampling for augmenting existing samples, responses (scale and degree) of hydro-ecological modeling to DSM products.
Convener:
Lawrence Band,
Univ North Carolina
lband@email.unc.edu;
Thorsten Behrens
thorsten.behrens@uni-tuebingen.de;
James Burt
jeburt@wisc.edu;
A-xing Zhu
Univ. of Wisconsin-Madison
azhu@wisc.edu.
Biogeosciences
H87:
Geophysics for the Critical Zone
We will address the state of the art of geophysical techniques applied for mapping and monitoring of the pedosphere and vadose zone. There is particular interest in the use of proximal sensing technologies for prediction of soil properties and observation of dynamic processes within the unsaturated zone. Geophysical techniques are widely used in Digital Soil Mapping. Furthermore, in the context of environmental modeling, there is a growing demand to provide multi-scale information. However, results are often limited to qualitative information and results are ambiguous. Reliable quantification is a major challenge. A promising approach is multi sensor mapping combining, e.g electromagnetics, ERT, GPR, gamma spectrometry, TDR, cosmic ray probes.
Convener:
Barry Allred
USDA/ARS - SDRU
allred.13@osu.edu
Ulrike Werban
ulrike.werban@ufz.de
Steffen Zacharias
steffen.zacharias@ufz.de
Peter Dietrich
UFZ Centre for Env. Research
peter.dietrich@ufz.de
Biogeosciences
H119:
Biophysical Processes and Interfaces in the Vadose Zone
Biophysical processes and interfaces play an important role in the ecological functioning of the vadose zone. We solicit presentations addressing interfaces between soil physical and biological functions from all disciplines interested in soils. We are particularly interested in links between soil properties and biological diversity at all scales - pore scale to regional scale. This explicitly includes contributions from biological engineering of habitats by micro-organisms, soil fauna and plant roots. We intend to promote a truly interdisciplinary exchange of ideas between soil physics and soil biological function with impacts on gaseous, water and nutrient fluxes, biodiversity, and soil function as Earth?s life support system.
Convener:
Dani Or
ETH Zurich
dani.or@env.ethz.ch;
Doris Vetterlein
doris.vetterlein@ufz.de;
Harry Vereecken
Forschungszentrum Julich GmbH
h.vereecken@fz-juelich.de;
Biogeosciences
H123:
Evapotranspiration from Heterogeneous Terrestrial Surfaces
Evapotranspiration rates and patterns affect energy balance of terrestrial surfaces and drive the hydrologic cycle. Evaporative losses define plant physiological function, and affect available water for biological activity in soil. Despite its importance, the prediction of evaporative drying rates from heterogeneous land and plant surfaces remains a challenge due to complex interactions between external conditions (radiation, humidity, temperature, air velocity), internal transport and surface properties. We invites theoretical and experimental contributions addressing evaporation from biological and earth surfaces including transport mechanisms and media properties, energy considerations, and atmospheric exchanges at all scales.
Convener:
Dani Or
ETH Zurich
dani.or@env.ethz.ch;
Jan Vanderborght
Inst Agrosphere IBG 3
j.vanderborght@fz-juelich.de;
Nima Shokri
Boston University
nshokri@bu.edu.
Biogeosciences
H129:
Root-Soil Interactions: New Advances in Monitoring and Modeling Approaches
Root uptake of water and nutrients are key processes controlling mass and energy fluxes between land and atmosphere. Recent advances in experimental techniques, such as geoelectrical methods, MRI, X-ray and neutron imaging, optical methods, and microprobes allow investigation of root-soil interactions in-situ. Combining highly-resolved observations with numerical models is needed to derive the information on nutrient and water dynamics in the root-zone and advance our understanding of the plant-soil-water relations. To promote the discussion between soil and plant scientists we invite modeling and experimental papers on advances in soil-plant relations from microscale over single-plant to field and regional scales.
Convener:
Andreas Pohlmeier,
a.pohlmeier@fz-juelich.de;
Mathieu Javaux
Mathieu.javaux@uclouvain.be;
Andrea Carminati
UFZ
andrea.carminati@ufz.de;
Ahmad Moradi
University of California Davis
amoradi@ucdavis.edu.
Biogeosciences
PP11:
From the Critical Zone to the Oceans: Connecting Litho-, Bio- And Hydrosphere With Geochemical Proxies
Processes in the critical zone and during element transport impact the biosphere and hydrosphere; they control the bioavailibility and delivery of many important nutrients and metals to the oceans. Therefore, these processes impact Earth's climate. We like to explore geochemical processes and cycles in the critical zone as well as during transport of nutrients and metals to the oceans on modern to glacial time-scales. The emphasis will be on the use of proxies such as concentrations, radiogenic, light and heavy stable isotopes. Studies that allow quantification, determination of the rate and nature of (paleo-) pedogenic, weathering and transport processes are particularly welcome.
Convener:
Julie Pett-Ridge,
High cross
Julie.Pett-Ridge@oregonstate.edu;
Kevin Burton
Earth Sciences - Oxford
K . W . Burton@open.ac.uk;
Christopher Siebert
University of Oxford
christopher.siebert@earth.ox.ac.uk.
Biogeosciences