Friday, March 25, 2011
Abstracts submission is open until 30.4.2011.
A broad range of hypoxia related scientific themes will be covered with a strong focus being on Open Ocean deoxygenation and OMZs:
o Oxygen distribution and physical and biogeochemical controls
o Challenges of model parameterizations and predictions of O2 changes
o The past ocean: what can we learn from episodic widespread anoxia
xxthroughout the Earth’s history?
o The present ocean:
xx- Increase of coastal hypoxia
xx- Interplay between acidification and deoxygenation
xx- Implication on marine biogeochemical cycling
o Oxygen Minimum Zones and greenhouse gases
o Change in ocean circulation and mixing and its impact
xxon oxygen distribution
o Getting into the realm of the microbial activity:
xxa functional genomic approach
o Towards new biogeochemical microsensors and networks
xxfor marine biogeochemical cycling (in situ and satellite
Tuesday, March 15, 2011
Eawag's idyllic Kastanienbaum branch as seen from Lake Vierwaldstaettersee (image courtesy of Eawag).
Now that all observatories at all project sites have been installed or deployed for some time all participants look forward to an inspiring meeting with a lot of discussions on the data obtained. The core part of the meeting is dedicated to the reports from the different observatories. An additional focus is on the combination of monitoring and modeling activities in order to generalize the findings and to project them into the future. Efforts for data archiving in HYPOX and the linkage of HYPOX with the Global Earth Observation System of Systems (GEOSS) form another important part of the meeting.
On Thursday an open workshop on oxygen sensor technology and application takes place. The workshop includes presentations by sensor manufacturers as well as reports on sensor-related scientific activities.
A preliminary program of the meeting is available HERE.
Sunday, February 13, 2011
EUR-OCEANS Conference - Ocean deoxygenation and implications for marine biogeochemical cycles and ecosystems 24-26 October 2011, Toulouse, France
This conference aims to bring together biological, biogeochemical, and physical oceanographers to discuss the issue of deoxygenation in the world ocean and its implications for ocean productivity, nutrient cycling, carbon cycling, and marine habitats. A serious consequence of global warming that is increasingly gaining importance is the decrease of the dissolved oxygen content of the world ocean. Deoxygenation and extension of the Oxygen Minimum Zones (OMZs) are predicted because oxygen is less soluble in warmer waters and also because the changing oceanic stratification and circulation will reduce the supply of O2 to the ocean interior. However, the biogeochemical contribution due to the O2 consumed by the aerobic processes (e.g. remineralization, nitrification) remains to be quantified. This deoxygenation in subsurface waters will have widespread consequences due to the role O2 plays in the biogeochemical cycling of carbon, nitrogen and other important elements such as P, Fe, Mn, S, etc.. O2 is instrumental to all aerobic life and sublethal and lethal O2 thresholds vary greatly between marine organisms. OMZs are key regions in the climatic gases budgets: O2, CO2, N2O, CH4, halogenous compounds...
Some scientific related specific issues include: What is the complete influence of the OMZs on climate change, taking into account the impact of the greenhouse gases, cloud formation and control of O3 and O2? How sensitive the OMZs characteristics are to changes in oceanic circulation associated to global warming? What are the mechanisms associated with a bio-, photo-, or chemo-degradation of organic matter (including CDOM) for the production of greenhouse gases, e.g. the switch from an aerobic (O2-respiration) to an anaerobic (via NO3, SO4, methanogenesis, IO3, Fe) remineralization?
Developing new dedicated sensors for the ocean observing system, modelling tools and understanding the key relevant biogeochemical and physical processes to predict future O2 contents of the world ocean constitute an immense challenge. The goal of this conference is to provide a science arena where to discuss the state of the art of our knowledge on all these topics and in building a unified research agenda across the full range of oceanographic disciplines.
This EUR-OCEANS Consortium 2011 Conference takes a multi-disciplinary view of the problem. Oral sessions will consist of invited speakers, all very active leaders in their fields, and will mix scientists from different disciplines within the sessions. All other presentations will take place in poster sessions. Participants are very much encouraged to present their work in the form of posters. The structure of the conference will allow for formal discussion sessions in the mornings and afternoons and informal networking and discussions in the evenings. Number of participants is limited (around 70 persons). Some grants will be available for PhD and post-doc participants.
Wednesday, August 18, 2010
If somebody is still in doubt about the need to monitor oxygen and to better understand hypoxia formation in aquatic environments it is highly recommended to read an article by Virginia Gewin about hypoxia formation off the Oregon coast that was recently published as a Nature News Feature. For the past 9 years hypoxia has been observed in coastal waters that do not receive enough fertilizer runoff from the adjacent coast to explain the recurrent decline in oxygen concentrations by eutrophication. Instead the most probable reason for hypoxia off Oregon is a decrease in oxygen concentration in water layers that feed the seasonal upwelling. Whether or not this is directly connected to climate change is still under debate. One thing, however, is clear: in order to better understand and predict oxygen fluctuations it is necessary to improve oxygen observation capacities. A need that is certainly recognized by the hypox consortium...
Text: Felix Janssen
Friday, May 28, 2010
Fig. 1: R/V ALKOR: Tonnage 1322GT, Length 54,5m, Beam 12,5m, Scientific Crew 12. (Photo: IFM-GEOMAR)
Fig. 2: Map of ALKOR cruise No. 355: working area framed. (O. Pfannkuche, IFM-GEOMAR).
Fig. 3: Deployment of a GEOMAR-Lander from R/V ALKOR (Photo O. Pfannkuche, IFM-GEOMAR)
Text: Olaf Pfannkuche, IFM-GEOMAR
Thursday, April 8, 2010
R/V Maria S. Merian. photo: www.briese.de
HYPOX student Zeynep Erdem taking samples on a previous cruise to the istanbul strait area. photo: M. Guenter, MPI
The expected cruise track and the working areas of lag 15-1 of R/V Maria S. Merian: image: www.aquarius.geomar.de, F. Janssen, MPI
Stay tuned to learn more about the cruise: during the cruise the scientist will regularly update a weblog on the cruise and on first results. please follow this link or visit www.mpi-bremen.de.
text: M. Schloesser, A. Boetius, F. Janssen
in 100-250 m
Friday, April 2, 2010
All in all eight scientists from three institutions join the workshop at AWI: Cécile Cathalot & Christophe Rabouille (CEA-CNRS), Eberhard Sauter, Frank Wenzhöfer, Ingo Schewe & Thomas Soltwedel (AWI), and Janine Felden (MPI-MM). Colleagues from UGOT are not attending the workshop but provide their oxygen data collected at HAUSGARTEN in summer 2007.
Figure 1: One of the buildings of the AWI in Bremerhaven (Germany), the institution that hosts the workshop
Figure 2: the logo of Pangaea, the data archive that hosts the HAUSGARTEN data
Text: Thomas Soltwedel & Felix Janssen