International Workshop on Organic Matter Spectroscopy 2015

WOMS 2015 - PROGRAM

Tuesday 22 September 2015

Course on the DrEEM use for analysis and banking of DOM fluorescence spectral data. Led by dr Kathleen Murphy and dr Colin A. Stedmon.

Wednesday 23 September – Friday 25 September 2015

SESSION 1
Land to ocean fluxes of DOM from glaciers, permafrost, rivers and estuaries.

SESSION CHAIRMAN:

dr Robert Spencer

Florida State University, Tallahassee, USA


ABSTRACT:

The session focuses on fluxes of DOM from land to ocean in the Arctic and Boreal zone. DOM contained in glaciers, permafrost, and produced in boreal and tundra environments is released into ground and surface waters, driven by hydrologic processes (e.g. spring thaw, rainfall events) or due to increasing temperatures in these regions. This DOM is subsequently transported out to coastal seas and the Arctic Ocean where it is subject to microbial and photochemical processes. This session is focused on studies coupling CDOM measurements to DOM characterization techniques to derive improved mobilization and export terms from land to ocean and assessment of how DOM is transformed in inland and marine environments through microbial and photochemical processes.


INVITED SPEAKER:

dr Simon Belanger

Université du Québec à Rimouski, Québec, Canada.

SESSION 2
Spectroscopic characterization of DOM in Polar regions.

SESSION CHAIRMAN:

dr Mats Granskog

Norwegian Polar Institute, Norway


ABSTRACT:

Studies focused on spectroscopic characterization (absorption and fluorescence) of CDOM/FDOM in Polar regions. The DOM optical properties are often used as a tool to study DOM dynamics on different spatial and temporal scales are welcome to contribute to this session. The FDOM measurements combined with multivariate statistics model are capable to resolve qualitative changes of DOM due to dilution, and transformation processes related to microbial activity and DOM photochemistry. The absorption budget and contribution of CDOM to heating of the surface of the Arctic Ocean can be directly quantified by interaction of CDOM with incident solar radiation. The CDOM can also act as water traces therefore its budget could estimated by linking of CDOM optical properties with inflowing and out flowing water masses into the Arctic Ocean. CDOM/FDOM spectral properties the in the Antarctic and Arctic region will be compared. The role of internal sources in the CDOM/FDOM budget in the Arctic Ocean related to phytoplankton bloom in the sea ice, under sea ice and within open waters will be discussed. Importance of sea ice formation and melt in near surface CDOM dynamics will be addressed.


INVITED SPEAKER:

dr Atsushi Matsuka

Laval University, Takuvik Joint International Laboratory Quebec, Canada

SESSION 3
Photochemical transformation of DOM: spectral characterization, quantum efficiency and kinetics.

SESSION CHAIRMAN:

dr Anssi Vähätalo

Department of Biological and Environmental Science, University of Jyväskylä, Finland.


ABSTRACT:

Studies focused DOM photochemistry are welcomed to contribute to this session. The photochemical transformation of the DOM is an efficient sink of DOM in the aquatic environment. The quantum efficiency of photochemical DOM transformation, degradation substrates and products as well kinetics are poorly understand and quantified. Methods for the determination of spectral apparent quantum yields have been used almost two decades but not critically evaluated yet. The substantial gap in the knowledge remains to be filled in quantification of solar energy utilized in photochemical DOM degradation at different spectral regions and at depths in aquatic systems.


INVITED SPEAKER:

prof. Huixiang Xie

Université du Québec à Rimouski, Québec, Canada

SESSION 4
New methods for CDOM/FDOM characterization in aquatic environment.

SESSION CHAIRMAN:

dr Oliver Zielinski

Institut für Chemie und Biologie des Meeres, Universität Oldenburg. Germany.


ABSTRACT:

Advance on absorption and fluorescence spectroscopy methods as effective tools to study DOM cycles in aquatic systems will be addressed. The new instrumentations and new data analysis tools will be presented. The need of rigorous measurements protocols, data analysis and correction(e.g. inner-filter correction methods, instrumental corrections, calibration and instruments drift) will be discussed. Examples of new measurements techniques applications will presented.


INVITED SPEAKER:

dr Philippe Massicotte

Aarhus University, Department of Bioscience, Roskilde, Denmark

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