Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Autumn Gales Carried Oxygen into the Baltic

27.02.2012
Since a decade, the first relevant salt water intrusion finally occurred

Physical oceanographers and marine chemists at the Leibniz Institute for Baltic Sea Research in Warnemünde returned from their latest monitoring cruise (2-14 February 2012) with good news: the autumn gales of November/December 2011 had spilled a large amount of North-Sea water into the Baltic Sea.

Along with the salty water, oxygen is transported into the deep regions of the Baltic which otherwise had suffered even longer from deficiencies of this vital substance.

Nevertheless, the enthusiasm of the scientists remains within limits; the imported mass of salt of about one billion tons (1 Gt) falls clearly behind the earlier major Baltic inflow events in the winters of 2003 (with 2.0 Gt) and 1993 (3.4 Gt). These days, the recently injected water is found east of Bornholm Island as a well-oxygenated near-bottom layer of 20 m thickness. “Later this spring, we expect the inflow to reach also the Gotland Basin in the central Baltic Sea but it will hardly carry enough oxygen with it to ventilate the entire water body there for a longer period”, said Rainer Feistel, physical oceanographer at IOW, estimating the anticipated effects.

The lack of substantial inflows after 1983 had resulted in a pronounced decline in salt and oxygen concentrations in the deep Baltic until 1993. As a consequence, fish like cod that needs salty and oxygen-rich water for spawning decreased significantly. Salinity gradually returned to normal by the inflow events of 1993, 1997 and 2003, as well as by frequent novel, noticeably warm small inflows in late summers.

In contrast, oxygen recovered only temporarily for 1-2 years after a strong winterly inflow. Accordingly, cod catches increased in the subsequent years. As a result of the current inflow, we may hope for similar effects in the years to come.

Contact address:
Dr. Rainer Feistel, 0381 / 5197 152, Department Physical Oceanography, IOW
Dr. Barbara Hentzsch, 0381 / 5197 102, Public Relation, IOW

Dr. Barbara Hentzsch | idw
Further information:
http://www.io-warnemuende.de

Further reports about: Autumn Baltic Sea Oxygen oxygen concentration sea snails

More articles from Life Sciences:

nachricht Cryo-electron microscopy achieves unprecedented resolution using new computational methods
24.03.2017 | DOE/Lawrence Berkeley National Laboratory

nachricht How cheetahs stay fit and healthy
24.03.2017 | Forschungsverbund Berlin e.V.

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>