|
|
|
Program & SessionsDetailed program & Book of Abstrats You can download the last version of the detailed program here. The Book of Abstracts is available here.
Session overview 1 - Innovative sensing methods for the Critical Zone. Session in honor to the memory of Henry Lin.
2 - Long-term environmental and biodiversity observation – understanding of the Earth system in the Anthropocene 3 - Integration of in-situ and remote sensing data for a better integration of the soil-vegetation-atmosphere and Earth system dynamics and services at the regional scale
4 - Temporal variability of CZ processes using high-resolution bio- and geoarchives
5 - Measuring and modelling water storage dynamics
6 - Biogeochemical processes at the soil and catchment scale
7 - Management and integration of environmental data
8 - Monitoring and modelling water and solid transport during extreme events
9 - Surface – groundwater interactions 10 - Earth system models : water and carbon cycle 11 - Hydrogeophysics (incl. ITN “ENIGMA”)
12 - Intermittent streams and rivers
13 - Mountain CZ and sustainability in a changing world
14 - Model data fusion : improving model prediction and process understanding
15 - Rates and processes of the CZ formation
16 - Mineral/biota interaction in the CZ
17 - Challenges in understanding CZ processes in Africa
Session Details 1. Innovative sensing methods for the Critical Zone. Session in honor to the memory of Henry Lin Conveners: Martin Schrön (UFZ, Leipzig) and Heye Bogena (Forschungszentrum, Jülich), Laurent Longuevergne (Géosciences, Rennes)
Session description: Access to informative observation is a pre-requisite to understand how linkages between geological, biological and hydrological cycles defines the critical zone. This thin and highly heterogeneous layer of the Earth extends from the land surface, including vegetation and water bodies, through the pedosphere and the unsaturated zone to the groundwater. The challenges consist in obtaining adequate representations of landscape spatial heterogeneity to inform bottom-up modeling approaches, or to design and perform integrated measurements to meaningfully constrain top-down modeling approaches. Several data sources are rarely used or poorly exploited in critical zone studies. These include new types of data that are still under investigation, as well as traditional types of data (e.g. results of fieldwork investigations, maps of various characteristics of the landscape) that are seldom used to a full degree in larger scale studies for various reasons, such as incommensurability problems and inadequate models.
This session will focus on how data obtained from new observation techniques and from innovative analysis of existing data sources can be used to inform model design and process identification at larger scales. We solicit contributions related but not limited to: (i) Innovative sensing and experimental techniques to advance understanding of the critical zone (e.g. wireless distributed sensing, cosmic-ray neutron sensing, hydrogeophysical methods, fiber optics, tracing methods, etc.) (ii) Methods for the evaluation, visualization, and interpretation of monitoring and experimental data sets from multiple sources (e.g. joint interpretation of various datasets) to maximize the information gained from critical zone observatories (iii) Analysis of spatial and temporal patterns of critical zone properties and processes at different scales (e.g. source deconvolution for hot moments/hot spots identification) (iv) Unusual and unexpected critical zone phenomena identified by measurements that seem to defy current understanding of the critical zone Keynote: Hans-Jörg Vogel (UFZ, Germany)
2. Long-term environmental and biodiversity observation - understanding of the Earth system in the Anthropocene
Conveners: Steffen Zacharias (UFZ, Leipzig), Thomas Pütz (Forschungszentrum, Jülich), Jérôme Gaillardet (IPGP, Paris)
Session description: Climate change and changes in land use are key factors in global environmental change that characterize the Anthropocene. The resulting changes in the environment affect all compartments of the environment and extend across all spatial and temporal scales and are one of the greatest challenges, not least for environmental research. Environmental research must face these challenges and new research approaches based on integrated and long-term environmental data are the order of the day. This session is dedicated to the observation of terrestrial surfaces over the long-term and includes all sorts of approaches, from the purely physical to the socio-ecological ones. Different perspectives and observation strategies have been developed corresponding the different scientific communities: observed compartments, essential parameters to be monitored, model-data interaction and implication of the stakeholders or citizens. This session aims at comparing these different views and initiatives for a better-integrated approach in terms of observation of terrestrial surfaces. We wish to attract works describing the philosophy and design of observatories and network of observatories observing the human habitat and the unprecedented changes that our planet is experiencing in the Anthropocene.
Keynote: Michaël Mirtl (UFZ Leipzig, Umweltbundesamt Vienna)
3. Integration of in-situ and remote sensing data for a better integration of the soil - vegetation - atmosphere and Earth system dynamics and services at the regional scale
Conveners: Carsten Montzka (Forschungszentrum, Jülich), Gilles Boulet (CESBIO, Toulouse)
Session description: In recent time, environmental observatories such as OZCAR and TERENO, but also ICOS, FLUXNET, ISMN, etc., fill the demand for establishing a common infrastructure for easy access to in-situ measurements. Those “networks of networks” (eLTER, ENEON) are able to provide key datasets to better inform terrestrial simulation and thus improve the Science of the Critical Zone at the surface-atmosphere and surface-subsurface interfaces. Similarly, the increasing availability of key biophysical variables from Remote Sensing (RS), especially at high resolution (<100m), is now a spatially distributed explicit constraint on Land Surface Models (LSM) at regional scale. However, there is still a long way to go, first to reduce significantly the uncertainty on the less observable state variables of the Critical Zone (say, soil moisture in the root zone and below), and second to optimize the joint use of many datasets of heterogeneous quality. This session targets (not exhaustively of course) the following key questions: How mature are the available RS products (e.g. from THEIA Land in France) in an operational data assimilation (DA) perspective, esp. with respect with the anthropogenic aspects of LS functioning ? What new spaceborne observations or products can we imagine or incorporate in DA platforms ? What in-situ-RS measurements protocols can efficiently complete the TERENO/OZCAR observatories in order to transform them into reference calibration/validation sites for ongoing and planned satellite missions ? How can AI techniques build efficiently on the large volumes of in-situ and RS data acquired so far to complete or even substitute mechanistic modelling approaches for a better assessment of the SVA functioning, possibly with a near real-time perspective ? How can observation design be optimized using synergies between LSM/RS data/in-situ data from existing observatories ? Can we think of CZ science areas that could benefit more from RS data, like biogeochemical cycles for instance ?
Keynote: Nicola Montaldo (Cagliari University).
4.Temporal variability of CZ processes using high-resolution bio - and geoarchives
Conveners: Ingo Heinrich (German Archaeological Institute DAI), Pierre Sabatier (EDYTEM, Le Bourget du Lac), Markus Schwab (GFZ, Potsdam)
Session description: Critical zone processes and their driving mechanisms including climate forcing (temperature, precipitation) and human impacts (pollution, agriculture, erosion) operate on a variety of time and space scales. Instrumental measurements, however, are only available for a limited time period and thus cannot describe the entire potential variability. Proxy data from various biological and geological archives have demonstrated that climate variability and environmental changes can be reconstructed even on seasonal to millennial time scales. The quantitative exploitation of proxy data in terms of critical zone processes and related forcings can be improved by a better understanding of the signal transfer into the different geoarchives (e.g., lake sediments, tree rings, speleothems). Ideally, this is achieved by integrating modern observation/monitoring and recent well dated proxy records. This approach leads to a sophisticated proxy interpretation allowing for an advanced assessment of ongoing changes in the Critical Zone based on longer time perspectives.This session aims to address specific problems of research at the interface of instrumental and proxy time scales, for example, the different temporal resolutions of data. We want to encourage discussions among researchers from different disciplines trying to elaborate a long term integrative understanding of Critical Zone trajectories under the influence of different drivers.We especially welcome contributions on monitoring of proxy data formation to develop a retro-observation of Critical Zone processes: synchronization and dating of proxy data time series from different natural archives, investigating the impacts and interactions of landscape forming and Critical Zone processes, combining high resolution archives with other data sources such as meteorological data, remote sensing data, historical information aiming at a comprehensive understanding of landscape evolution and Critical Zone processes, the use of landscape evolution models for hypothesis testing
Keynote: Fabien Arnaud, EDYTEM, Chambéry, France.
Conveners: Andreas Güntner (GFZ, Potsdam), Camille Bouchez (Géosciences, Rennes), Jean Marçais (RiverLy, Lyon)
Session description: The way catchments dynamically retain and release water is crucial to inform ecosystem sustainability and water supply in the Anthropocene. Yet it is difficult to : i) quantify the different water storage compartments in the critical zone (vegetation, vadose zone, shallow or deep groundwater) and their associated water and substance turnover and ii) decipher how these reservoirs and associated fluxes will dynamically respond under changes in climate forcing and anthropic transformation (land use changes, intensive agriculture). This session invites advances focusing on the monitoring and modelling of water storage compartments at the catchment scale. We particularly invite contributions aiming at developing new ways of unravelling water storage dynamics through geophysical experiments (in-situ, remote investigation, time-lapse geophysics), multi-tracer developments and hydrologic characterization. We also encourage studies that outline fundamental descriptors of catchment water storages and their associated dynamics, through integrated hydrological modelling or storage selection function approaches. Advances seeking to reconcile active vs passive storage zones, the flux vs storage paradox, event vs old water are also highly welcome.
Keynote: Daniella Rempe, Jackson School of Geosciences (Department of Geological Sciences), Texas, USA
6. Biogeochemical processes at the soil and catchment scale
Conveners: Nicolas Brüggemann (Forschungszentrum, Jülich), Anne Probst (ECOLAB, Toulouse)
Session description: climate, land-use change and agricultural practices affect the biogeochemical cycles of water, carbon and nutrients in terrestrial systems and influence their exchange with the atmosphere, surface waters and groundwater. As a key component of the critical zone, soil is the core of multiple interactions between climate, energy, water, nutrients and biodiversity. It plays an essential role at the interface between atmosphere, vegetation and bedrocks in the conversion, dynamics, transfer and storage of water, biogeochemical compounds and of many types of anthropogenic contaminants. However, too often biogeochemical processes have been studied only in one (soil, including rhizosphere, plant roots, soil organisms, and soil solution) or two (vegetation and soil) components of the critical zone, in isolation from the other ones (atmosphere and bedrock) and in disconnection of the water cycle from the vegetation to the groundwater interfaces. Moreover, it is essential to get a broader view of the processes in terms of spatial and temporal scales. In this respect, catchment and sub-catchments offer an invaluable tool to monitor, understand and model the coupled biogeochemical and hydrological processes and to assess water and element budgets. This session invites contributions that advance our understanding of the above mentioned processes. Attention should focus not only on the soluble elements and on chemical erosion, but also on particulate elements, mechanical erosion and gas exchange with the atmosphere. Contributions on biogeochemical cycles integrating the different scales and the mentioned interface compartments will be appreciated. A particular focus of the session should be on hydraulic connectivity within the catchment, and on the role of wetlands (s.l.), riparian and hyporheic zones, which connect superficial hillslope, groundwater and channel systems and act as hot-spots reactors of biogeochemical cycles. Contributions of research using new methods and experimental techniques, such as high-frequency or non-invasive sensors used for long-term monitoring, as well as isotopic constraints are particularly encouraged.
Keynote: Markus Reichstein, Max Planck Institute of Biogeochemistry (BGC), Iena, Germany
7. Management and integration of environmental data
Conveners: Ralf Kunkel (Forschungszentrum, Jülich), Jan Bumberger (UFZ, Leipzig), Isabelle Braud (RiverLy, Lyon)
Session description: Together with the rapid development of sensor technologies and the implementation of environmental observation networks, a large number of data infrastructures are being created to manage and provide access to observation data. These data are necessary to provide significant advances in Earth System understanding and modeling and to progress towards models with predictive power concerning the evolution of the Earth System. However, data collected in the observatories as well as their management are often very heterogeneous, rendering a better and easier integration of data from distributed infrastructures more complex. A better use of data strongly depends on the capabilities of dealing with fast growing multi-parameter data of heterogeneous sources and on effort employing data science methods, adapting new algorithms and developing data pipelines tailored to specific scientific needs. The development of methods for the automatic real-time processing and integration of observation data in models is also required in many applications. Automated quality assessment/control pipelines, data discovery and exploration tools, standardized interfaces and vocabularies as well as data exchange strategies and security concepts are required to interconnecting distributed data infrastructures. This session focuses on the specific requirements, techniques and solutions to process, provide and couple observation data from (distributed) infrastructures and to make observation data available for modelling and other scientific needs. Keynote: Christoph Wohner (Umweltbundesamt GmbH, Austria)Conveners: Luis Samaniego (UFZ, Leipzig), Caroline le Bouteiller (ETNA, Grenoble), Guillaume Nord (IGE, Grenoble)
Session description: Floods, droughts, erosion and sediment transport have important societal impacts such as natural hazards, soil degradation, water quality and ecological status of aquatic environments. This session aims at exploring monitoring and modelling physical processes responsible for floods, droughts, erosion and sediment transport (fine and coarse) at spatial scales ranging from small to mesoscale catchments (up to 10000 km²) and temporal scales ranging from the event to decades multi-year. We also aim to develop better monitoring and seamless modelling of spatial patterns in land surface/hydrologic models that fully exploit the newly available hyper-resolution distributed earth observations. From the monitoring point of view, promising approaches include novel remote-sensing techniques (Structure from Motion, thermal/multispectral camera, lidar), indirect methods for measuring bedload fluxes, monitoring by camera, geophysics for a better description of the subsurface, sediment and water fingerprinting for a better understanding of pathways through the catchment, spatialisation of low-cost sensors, use of rainfall radar data, etc. From the modelling and theoretical point of view, challenges include the use/development of parsimonious models, calibration/validation methods for multisite, multi-scale and multivariable models, coupling of models at the catchment scale of water/suspended matter/reactive matter associated with the particulate phase, representation of the heterogeneity of surface and subsurface compartments, description of water and sediment (dynamic) connectivity within the catchment, accounting for and tracing uncertainty in data and models. We also aim to promote the development of new parameterizations based on novel observations, new processes understanding and new qualitative data-based techniques. Keynote: Estela Nadal Romero (CSIC Zaragoza Instituto Pirenaico de Ecologia, Spain) 9. Surface - groundwater interactions
Conveners: Jan Flekenstein (UFZ, Leipzig), Agnès Rivière (Centre de Géosciences, Fontainebleau)
Session description: Sustainability of water resources and flow regimes is threatened by global change impacts ( anthropogenic uses and climate change). Quantification of surface water– groundwater (SW-GW) interactions (stream-aquifer, lake-aquifer, unsaturated zone, …) are critical to adopt appropriate management decisions for an optimal use of water resources and ecosystem support. However, such quantification based on field measurements is not straightforward because a myriad of morphological, physical and biogeochemical factors, all of which are subject to spatial and temporal variability across nested interfaces, lead to complex patterns in exchange flows, residence times and solute turnover over multiple spatial scales.A wide range of field methods is now available to estimate SW-GW exchange, but not all of them are universally applicable, and each method has its own advantages and limitations. Estimating SW-GW exchange therefore requires a smart combination of field methods and modelling techniques at different spatial scales. In this session we aim to shed light at innovative applications of methods to bridge the gap between field observations and numerical modelling at the surface water groundwater interface across multiple scales.
10. Earth system models : water and carbon cycle
Conveners: Agnès Ducharne (METIS, Paris), Harry Vereecken (Forschungszentrum, Jülich)
Session description: Earth System models play an essential role in understanding and assessing the interplay between climate and land use change on the one hand, and the water and biogeochemical functioning of the land surface. They provide the scientific basis for designing mitigation and adaptation strategies to climate change. Still these models show considerable uncertainty in quantifying water and biogeochemical fluxes. This is caused by the uncertainty in both process descriptions and parameterization of the land surface. In this session we seek contributions that aim at improving the description of the land surface and specifically the critical zone in Earth System models, with a specific focus on water and carbon.
Keynote: Philippe Ciais, LSCE, JRU 8212, France
11. Hydrogeophysics (incl. ITN “ENIGMA”)
Conveners: Ulrike Werban (UFZ, Leipzig), Damien Jougnot (METIS, Paris) and Nolwenn Lesparre (ITES, Strasbourg)
Session description: Geophysical methods have a great potential for characterizing subsurface properties and processes to inform hydrological and (bio)geochemical studies. They can provide subsurface data with an unprecedented spatial and a high temporal resolution in a non-invasive manner. However, the interpretation of these measurements is far from straightforward in many contexts and various challenges still remain. This session welcome contributions dealing with the use of geophysical methods for the characterization of the critical zone: from its static properties to dynamic processes. We encourage submissions addressing i) the acquisition, inversion and interpretation of geophysical data and other minimally invasive methods in the critical zone, ii) model-data fusion including new concepts for joint and coupled inversion, and iii) petrophysical understanding linking hydrological and geophysical properties. Hydrogeophysics case studies on the OZCAR-TERENO observatories are particularly welcomed. This session will also include contribution from the european project ENIGMA ITN which aims at training a new generation of young researchers in the development of innovative methods for imaging process dynamics in subsurface hydrosystems.
12. Intermittent streams and rivers
Conveners: Jérôme Molénat (LISAH, Montpellier), Ophélie Fovet (SAS, Rennes)
13. Mountain CZ and sustainability in a changing world
Conveners: Ralf Kiese (KIT IMK-IFU Garmisch-Partenkirchen) and Florence Naaïm (INRAE Grenoble)
Session description: Global change has triggered several transformations, such as alterations in climate, land productivity, water resources, natural hazards and atmospheric chemistry, with far reaching impacts on ecosystem functions and services. Finding solutions to climate and land cover change-driven impacts on our terrestrial environment is one of the most important scientific challenges of the 21st century, with interlinkages to the socio-economy. A global hot spot of climate change are mountain areas, such as the European Alps and preAlps, which have been exposed to more intense warming compared with the global average trend and to higher frequencies of extreme hydrological events, such as droughts and intense rainfall. This session will focus on meteorological, hydrological and biogeochemical interactions as well as feedback mechanisms in mountain critical zones such as • ecological and hydrological consequences of deglaciation, permafrost and snow cover change, • alteration of weathering, erosion and avalanche processes operating under vegetation and/or climate change, • alteration of water, energy and matter (CO2, other GHGs) exchange influencing ecosystem functions such as C and N storage, nutrient and water retention as well as productivity and biodiversity. 14. Model data fusion : improving model prediction and process understanding
Conveners: Harry-Jan Hendricks-Franssen (Forschungszentrum, Jülich), Jean-Reynald de Dreuzy (Géosciences, Rennes)
Session description: This session focuses on model-data fusion methods for critical zone research, which includes for example model-data fusion in the areas of hydrology, ecology, soil science, land surface modelling and terrestrial systems modelling. Model-data fusion methods include for example data assimilation, inverse modelling and hybrid approaches with machine learning. These approaches are for example used for short and medium term model predictions, near real-time control, parameter estimation, and identification of model structural errors. We welcome novel contributions in the area of model-data fusion, relevant for critical zone research. Examples are new methodological developments, studies with novel types of measurement data, studies with integrated models across different compartments of the terrestrial system, or applications with large amounts of verification data which allow a precise assessment of the model-data fusion methods.
Keynote: Clement Albergel (CNRS CNRM, France)
15. Rates and processes of the CZ formation
Conveners: Roland Bol (Forschungszentrum, Jülich), Julien Bouchez (IPGP, Paris)
Session description: The Critical Zone (CZ), located at the surface of our planet, hosts nearly all terrestrial life. Therefore, studying its formation, development, and vulnerability bears importance for our understanding and management of the Earth habitability. This session will focus on the lower boundary of the CZ, where rock is turned into loose material under the actions of water, atmospheric gases, and biogenic acids, or through the effect of frost fracturing, and thus typical “critical zone material” is formed. Indeed, this first step of rock-to-CZ conversion, located at the so-called “weathering front”, is the point of entry of elements to the Earth surface, allowing for these elements to then be cycled by various CZ processes such as mineral dissolution and precipitation, plant uptake, or exchange with the atmosphere. It is thus of utmost importance to identify the underlying mechanisms responsible for this transformation, and to gauge the rates at which it occurs. In this session we welcome contributions which broaden our understanding of the processes turning rocks into CZ material (mineral dissolution, rock fractures, roots) at all scales (from the mineral surface to river basins) using a wide range of tools, from innovative field measurements, through in-lab analyses making use of geochemical tracers / chronometers and isotope studies, to the modelling of water-rock interactions.
Keynote: Bill Dietrich, U California Berkeley (Earth Science Department), USA
16. Mineral/biota interaction in the Earth's critical zone Conveners: Anke Hildebrandt (UFZ, Leipzig), Damien Lemarchand (U. of Strasbourg)
Session description: Interactions between mineral phase and living organisms affect in multifold ways the composition, functioning and evolution of the Critical Zone. This includes chemical and physical weathering of the rock and soil formation, thus shaping pathways of element and water fluxes in the soil/plant system and development of the vegetation cover. This has broad impacts on landscape shaping and atmospheric composition over geological time scales but also on quality of the soil and water resources at much shorter time scale. The aim of the session is to bring together contributions on the relationships between mineral and soil evolution on one hand and the composition and functioning of the biota on the other. We invite submissions from a wide range of spatial scales, e.g. from the mineral/molecule interface to ecosystem scale, and interdisciplinary approaches. Contributions may deal with the influence of biological processes and/or organic compounds on the weathering reactions, secondary mineral and soil formation processes including aggregation as well as on the formation of flow paths. We particularly welcome contributions on the developments of biotic or abiotic tracers, investigations on processes and rates of mineral/biota interactions as well as their consequences on biogeochemical and water cycles, and feedbacks between those processes and the structure and functioning the soil and ecosystems.
Keynote: Friedhelm von Blanckenburg, GFZ German Research Centre for Geosciences, Potsdam, Germany
17. Challenges in understanding CZ processes in Africa Conveners: Harald Kunstmann (KIT IMK-IFU, Garmisch-Partenkirchen), Sylvie Galle (IGE, Grenoble)
Session description: Africa as a whole is facing serious adaptation challenges to global warming. Climate change will significantly affect the regional water cycle and some regions even may become inhabitable. African population is the fastest growing worldwide. It is expected to double by 2050 (UN, 2017), leading to reinforce profound land use changes that have already been witnessed in this region.In addition to the oceans, it is the complex interactions and feedbacks between the land surface and the atmosphere that are driving the African Monsoon system and that are still insufficiently understood. And yet, they will likely play a major role in modulating the impact of the global increase of GHG on the climate of various African regions, with possible major consequences on both food and water security. Environmental decision-making will become more challenging in this fast-evolving context, with high stakes for the population well-being. Arbitrating between different land use practices with the aim of mitigating the environmental and socio-economic impacts of a rapidly evolving climate and population requires to apprehend as precisely as possible the trajectories of the socio-eco systems over a large range of scales. Reliable observations and adapted modelling approaches of the critical zone are a key element in this respect. This session encourages abstracts on interdisciplinary studies of the critical zone, aiming at increased understanding of the physical land surface and subsurface processes occurring in Africa. Both observation and modelling based studies are foreseen. Compartment crossing approaches are particularly invited, likewise case studies on the interaction of CZ with climate and their consequences, including societal impacts.
Keynote: Thierry Lebel, IRD, France |
| Online user: 14 | Privacy |
|
