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2nd Russian GEOTRACES Seminar

7 February 2020

The 2nd Russian GEOTRACES seminar was held in February 7, 2020 in Moscow at the Shirshov Institute of Oceanology, Russian Academy of Sciences (https://ocean.ru). Eric Achterberg initiated the GEOTRACES seminar during his visit as part of the Helmholtz team. About 50 people attended the seminar in Moscow and some people listened to the presentation remotely in Sevastopol, Kaliningrad, and Arkhangelsk. The presentation aroused a great interest among the seminar participants.

Organizers

Prof. Dr. Eric Achterberg (SSC member), PhD Marina Kravchishina (SSC member) and Prof. Dr. Piotr Zavyalov (Corresponding Member of Russian Academy of Sciences (RAS), Shirshov Institute of Oceanology of RAS, chairman of the regular academic council meeting).

Introduction

12:00 (about 15 min)

Piotr Zavyalov welcomed the colleagues of IO RAS and guests from other Institutes and Universities (Lomonosov Moscow State University, Russian Federal Research Institute of Fisheries and Oceanography and etc). He then introduced Prof. Dr. Eric Achterberg (Chemical Oceanography GEOMAR, Helmholtz Centre for Ocean Research Kiel and Christian-Albrechts University Kiel, Germany, member of the international GEOTRACES program) who initiated the GEOTRACES seminar.

Marina Kravchishina reported about GEOTRACES activity in Russia and highlighted the main purposes of the study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs) and the need for international collaboration.

Opening Speech

50 minutes talk

Prof. Dr. Eric Achterberg

International GEOTRACES Programme: Observations across ocean gradients provide insights into biogeochemical cycles

Experimental work in laboratories and at sea provides important detail on biogeochemical processes and (micro)-nutrient limitation of ocean productivity. Whilst forcing variables can be carefully manipulated in bottle and mesocosm experiments, artefacts may occur due to exclusion of parts of plankton communities, contamination and/or ´bottle´ effects. Biogeochemical process observations across biogeochemical gradients as part of section cruises form an elegant alternative. In this talk, I will present examples of how cruises linked to the SOLAS and GEOTRACES programmes are providing excellent platforms for observations of changes in biogeochemical processes as a consequence of strong geochemical gradients. I will present geochemical gradients related to volcanic, dust, glacier and river inputs and their impacts on ocean biology. I will explore variations in nitrogen fixation, (micro)-nutrient limitation of microbial communities, and iron cycling related to changes in supply of (micro)-nutrients and oxygen.

The improved process understanding and quantification can be used for projections of biogeochemical processes in a future ocean.

About 20 minutes – questions and discussion after the presentation.

Lunch

Round Table

About two hours.

A very useful discussion on the TEIs clean sampling systems and analyses was organized after the seminar by Prof. Dr. Eric Achterberg (SSC member), PhD Marina Kravchishina (SSC member) and Dr. Ludmila Demina (Past SSC member). About 10 people took part in the discussion that interested in TEIs studying in seawater.

Details

Date:
7 February 2020
Event Category:
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Venue

Shirshov Institute of Oceanology, Russian Academy of Sciences
Moscow, Russian Federation

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