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 A Map of the Cell’s Power Station
18.08.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

nachricht On the way to developing a new active ingredient against chronic infections
18.08.2017 | Deutsches Zentrum für Infektionsforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>