Goldschmidt 2016

Goldschmidt 2016
Dates: 26 June – 1 July 2016
Location: Yokohama, Japan

The abstract deadline is 26 February 2016.

For further information: http://goldschmidt.info/2016/

GEOTRACES Workshop:

Exploring GEOTRACES data with Ocean Data View     
***For more information please go to the Workshop website***

Organizers: Jing Zhang, Reiner Schlitzer, Elena Masferrer Dodas

This hands-on workshop will teach standard and advanced ODV methods for the exploration and scientific analysis of environmental data. The GEOTRACES Intermediate Data Product 2014 (IDP2014) will be used as example dataset. Participants will learn how to create publication-ready maps, property-property plots and sections and how to apply simple or advanced station and sample filters. In addition, an overview over the wide range of derived variables available in ODV will be given and a number of variables often needed in geochemical research will be described and applied. This includes aggregation, interpolation, unit conversion, differentiation and integration. Note that creation of spinning 3D scenes is beyond the scope of this workshop. The workshop starts with presentations of general software concepts and capabilities, followed by hands-on-sessions for the creation of specific plot types and scientific discussion rounds explaining the findings. Participants are encouraged to bring their own laptop computer with ODV (http://odv.awi.de/) and the IDP2014 dataset (http://www.bodc.ac.uk/geotraces/data/idp2014/) already installed. Specific requests by participants prior to the workshop or during the event are welcome.

GEOTRACES sessions:

12d: Oceanic Cycling of Trace Elements Using Elemental, Isotopic, and Modeling Approaches: Geotracers and Beyond…

Convenors: Tim Conway, Tristan Horner, Jessica Fitzsimmons, Hajime Obata, Catherine Jeandel, Andrew Bowie, Phoebe Lam
Keynote: Sylvia Sander (University of Otago)

Abstract: The distribution of trace elements and their isotopes in the oceans results from a myriad of processes, with these elements serving critical roles as regulators of ocean biogeochemistry including marine ecosystem dynamics. Despite this, we still lack a complete understanding of not only the mechanisms by which these elements influence the functioning of ocean ecosystems, but also the controls on the transfer of these elements at oceanic interfaces (e.g. atmospheric, ice, sedimentary, shelf, rivers, and hydrothermal interfaces), and the processes that transform these critically important elements within the ocean interior. Recent concerted international endeavors such as the GEOTRACES Program are changing this picture and enabling a coherent landscape of oceanic trace element cycling to emerge. Accordingly, this session seeks to bring together scientists from recent oceanographic expeditions to integrate results within and between ocean basins. We invite abstracts on all aspects of oceanic dissolved and particulate trace element distribution and speciation, and we encourage submissions that apply novel analytical methods to understand elemental and isotopic (stable and radiogenic) distributions in the oceans, including those that address metal speciation, ligand binding, and size-fractionated distributions. We especially encourage submissions that utilize modeling approaches which draw on new datasets and/or which aim to constrain the biological and chemical processes that determine the distributions of trace elements in seawater in the context of large-scale physical mixing, or past and present ocean circulation, redox conditions and hydrothermal activity.

12f: Elemental and Isotopic Marine Biogeochemistry at a Range of Scales: The Global Ocean, Marginal Seas, and Polar Atmosphere–Sea Ice–ocean Systems

Convenors: Susan Little, Daiki Nomura, Gregory de Souza, Markus Frey, Delphine Lannuzel, Jun Nishioka, Patrick Rafter, Martin Vancoppenolle
Keynote: Daniel Sigman (Princeton University)

Abstract: We invite observational and modelling studies of marine elemental and isotopic biogeochemical cycling at a range of spatial scales. Our broad purview includes large-scale studies of macro- (N, Si) and micronutrients (e.g. Zn, Fe, Cu,) and other biogeochemically-cycled elements (e.g. Ba, Cd), as well as regional studies with a focus on the biogeochemistry of the the polar sea-ice zone (Arctic and Antarctic). By providing an interdisciplinary forum, this session aims to find parallels (and contrasts) between the isotope systems of macro- and micro-nutrients, and to better understand the components, drivers, processes and interfaces related to the cycling of carbon, nutrients, and trace elements and their isotopes (TEIs) within the polar atmosphere–sea ice–ocean system. Studies covering the spectrum of possible scales from whole-ocean budgets to molecular-scale fractionation are solicited, especially those that form a part of the GEOTRACES programme. In particular, we invite studies attempting to pick apart the roles of the physical circulation and internal oceanic cycling (e.g. biological uptake, scavenging, speciation) on tracer distributions, including the role of particulates and their associated TEI distributions. Submissions from the polar hydrosphere, atmosphere and cryosphere are solicited, including those related to polar climate change, river-ocean interaction, snow and sea ice physics and biogeochemistry, polar atmospheric chemistry and ocean acidification.

16d: Models of Life and Geochemistry: Integrating Large-Scale Datasets into Global Climate Models

Convenors: Seth John, Tatiana Ilyina, Andy Ridgwell

Abstract: ew global datasets and global modeling techniques can be brought together to study questions of biological, geochemical, and climatic importance. This session focuses on the utilization of large-scale datasets within a variety of modeling frameworks. Recent global datasets include shipboard ocean chemical observations such as GEOTRACES and WOCE, shipboard time-series programs, and sensor data such as Argo, mooring, and remote sensing data. Each of these observational datasets can be studied within the context of various global modeling techniques including coupled GCMs and high-resolution regional models as well in conjunction with relatively newly developed and numerically-efficient global-scale tools such transport matrix models (TMMs) and decadal predictions systems. We seek contributions from scientists working across a broad spectrum of global biogeochemical cycles including carbon, nitrogen, oxygen, nutrient, trace-metal, and particle distribution in the oceans, and the application of such tracers for constraining ocean circulation as well as sources and sinks of biologically and geochemically important elements and their variability in the ocean. We also encourage submissions rooted in modern geochemical observations that address future biogeochemical changes in the ocean by forward modelling.

GEOTRACES related-sessions:

14j: Linked Landscapes: Biogeochemical Connections Among Headwater Streams, Rivers, Estuaries and Coastal Ecosystems

Convenors: Nobuhito Ohte, David Widory, Scott Wankel, Taylor Maavara, Philippe Van Cappellen, Pierre Regnier, Ronny Lauerwald, Dipankar Dwivedi, Carl Steefel

Abstract: Rivers and their surrounding landscapes are the great integrators of the freshwater cycle and they represent the main pathway for biogeochemical transfers from land to ocean. An understanding of the mechanisms governing the linkages throughout the aquatic continuum is crucial for predicting ecosystem function, water quality, greenhouse gas emissions and the role of the coastal ocean in global carbon budgets. The structure and function of riverine, estuarine and coastal ecosystems are strongly affected by surrounding terrestrial ecosystems through a combination of hydrologic and biogeochemical dynamics and feedbacks, including hyporheic exchange. However, a mechanistic understanding of the nature of these linkages and feedbacks is lacking, particularly at the watershed- to global-scales. Investigating these knowledge gaps is complicated by the unprecedented rates of change over the last 100 years to the absolute and relative fluxes of elements such as C, N, P, S, Si, Fe and Ca, delivered by rivers to lakes and coastal zone. Here, we invite observational and theoretical contributions that identify and characterize: 1) biogeochemical linkages among terrestrial, river and coastal ecosystems, 2) the influence of local settings (geology, hydrology, climate, ecotypes, etc.) on these biogeochemical linkages, and 3) the time-dependent and coupled responses of riverine biogeochemical fluxes and transformations to anthropogenic drivers. Specific topics may include, but are not limited to, eutrophication and nutrient loading in aquatic systems, internal nutrient recycling, nutrient elimination/mitigation, river damming and channelization, multi-scalar properties of the hyporheic exchange flows that impact nutrient cycling, and impacts on trace gas fluxes (e.g., methane, nitrous oxide).

15b: Radionuclide Fate and Transport after the Fukushima Accident: Identifying What We Have Learned and Remaining Knowledge Gaps

Convenors: Anne Mathieu, Daniel I. Kaplan, Yoshiho Takahashi, Seigo Amachi, Fan Qiaohui, Yuichi Onda, Chris Yeager, Tsuyoshi Thomas Sekiyama, Mizuo Kajino
Keynote: Yuichi Onda (Tsukuba University)

Abstract: In 2011, an earthquake of magnitude 9, followed by a tsunami, triggered a major nuclear accident at the Fukushima Daiichi Nuclear Power Plant that released radionuclides in the environment. Five years after the Fukushima disaster, a milestone has been reached. One of the key conclusions made to date, is that while many studies have identified similarities to other nuclear accident sites, such as Chernobyl, studies have also revealed new insights into radionuclide transport owing to the circumstances surrounding the Fukushima accident, such as the direct injection of radioactivity into the ocean. While significant progress has been made, many uncertainties remain. The objective of this session is to not only present advances, but also identify key knowledge gaps that are limiting further advancement in these areas of research. Any research on the fate and transport of radionuclides related to the Fukushima accident is welcome in this session. In particular, papers are encouraged that integrate monitoring, experimental, and/or modeling approaches to add perspective and understanding to the recent accident in Fukushima. Relevant topics also include radionuclide biogeochemistry influencing transport in terrestrial and marine systems.

15e: Isotope Approaches to Characterize the Impacts of Natural Resource Development and Other Human Activities on the Environment

Convenor: Millot Romain
Keynote: Nathaniel R. Warner (Pennsylvania State University)

Abstract: Recent analytical developments of isotope systematics, for instance metals and metalloids (Hg, Cr, Zn, Cu, Pb, Cd, Tl, Ag, Sn, U, Fe, Se, Mo, U, Ra, Th) in the Environment, have experienced an unprecedented increase over the past few years. It is well known that: 1- metals mining and both conventional and unconventional hydrocarbon extraction can have a considerable environmental footprint, 2- within the framework of the exploitation of unconventional gases and oil, chemical elements potentially toxic to humans and wildlife (called the radionuclides toxic metals: RTM) pollute the flowback, 3- more generally the contribution of human activities such as industries, agriculture and various domestic inputs, becomes more and more significant in natural systems.
The aim of this session is to explore methods, indicators and research applications using innovative isotope systematics of elements such as H, C, N, O, S and Hg, Zn, Cr, Cu, Cd, Mo, Ag, Se, that in fine will provide: i) stronger constraints on the origin(s) and ii) a better characterization of the processes controlling the budgets of toxic metals and compounds in the Environment (e.g., soil, sediment, water, air) at local and global scales, in addition to transfer of these constituents to the food chain and potential effect on human health.

15l: Advances in Mercury Biogeochemistry

Convenors: Colin Cooke, Jeroen Sonke
Keynote: Daniel Obrist (DRI, Reno Nevada, USA)

Abstract: Mercury is a global pollutant that, once converted to methylmercury, can negatively impact human health. Present-day anthropogenic emissions of mercury are approximately an order of magnitude greater than natural emissions, and the chemical speciation of Hg dramatically affects its mobility and toxicity. Understanding the environmental cycling of mercury is paramount if reductions to mercury exposure are to be achieved. We invite presentations focused on field, laboratory and modeling studies of the sources, transport and fate of mercury in Earth surface environments (atmosphere, oceans & continents), including human exposure. We particularly welcome the use of novel approaches including but not limited to genomics, enriched Hg isotopes, stable Hg isotopes, spectroscopy, 3D coupled models, Hg-Se interactions etc.

16a: Tracing Ocean Circulation – Past and Present

Convenors: Ruza Ivanovic, Tina van de Flierdt, David Wilson
Keynote: Geoffrey (Jake) Gebbie (Woods Hole Oceanographic Institution)

Abstract: Ocean circulation is an important part of the Earth system, playing a key role in controlling or responding to climate change. With limited direct observations for ocean currents and mixing, geochemical tracers are a valuable tool for reconstructing ocean circulation, past and present. Increasingly, such tracers are being incorporated into complex numerical climate models, the observational database is being expanded, and better knowledge of what influences the geochemical archives is being gained. These recent improvements in modelling and measuring tracers enable a more thorough understanding of ocean-climate interactions on a range of timescales. For this session, we invite contributions that use measured and/or modelled geochemical tracers to constrain ocean dynamics in the past and present. We particularly encourage submissions that link changes in ocean circulation and mixing with surface climate.