Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 
Datenbankrecherche:

 

A salt water inflow of astonishing dimensions

07.01.2015

Season´s greetings from the North Sea turned out to be the third largest salt water inflow since the beginning of oceanographic observations in the Baltic Sea: From December 13 to 26, 2014, the Baltic Sea faced a very rare phenomenon being of high importance for its ecosystem: for several days oxygen rich saltwater from the North Sea flowed into the Baltic Sea.

After all measured data of the time in question are evaluated, the Warnemünde oceanographers conclude that it turned out to be the largest saltwater inflow since 60 years. Among all inflows which have been detected since the beginning of oceanographic measurements in 1880, its volume of 198 km³ makes it to the third largest inflow ever observed.

In total, approximately 4 giga tons of salt were thus added to the Baltic Sea. During the coming months, the IOW will investigate on a regular basis how these water masses will be further spread in the central Baltic Sea and which effect they will have. As the inflowing water showed a very good oxygen saturation, the IOW scientists assume that the so called „dead zones“ in the Bornholm and Gotland Basin with zero oxygen and toxic hydrogen sulfide in the bottom regions will largely benefit from this inflow.

This phenomenon was preceded by a period of prevailing Easterly winds causing a strong outflow with a subsequent significant lowering of the sea level and weakening the outflow. When afterwards on December 5, the wind changed to Southwest, later to West, saline North Sea water swashed into the Baltic. As this wind situation stayed unchanged over nearly three weeks, large amounts of saltwater could enter the Baltic through the Øresund first and with a small delay also through the Belt Sea.

Real-time data from the „Early-Warning System “MARNET” enabled the scientists to be right in time on the spot. Thus, all necessary measurements could be performed to record the dimensions of this inflow. The MARNET is a network of autonomous measuring stations, operated by the Federal Maritime and Hydrographic Agency (BSH). Three of the five stations in the Baltic Sea are maintained by IOW.

One of them is the station “Darss Sill” positioned on a submarine sill of the same name which separates the Belt Sea from the basins of the Baltic Proper. A further station is moored in the Arkona Basin, east of the Darss Sill station. Both stations are equipped with temperature and salinity sensors in different water depths. They are permanently delivering measured data per satellite to IOW and BSH, and provide an efficient survey of the water exchange between the North Sea and the Baltic Sea.

First signals indicating an inflow were transmitted from the station Arkona Basin on December 12. They prompted the Warnemünde oceanographers to change the programme of an already scheduled expedition with r/v “Elisabeth Mann Borgese” on December 15 in order to collect additional information on the spatial distribution of the inflowing water masses.

The IOW scientists will observe the aftermaths of this inflow throughout the following year. The next expedition with r/v „Elisabeth Mann Borgese“ which will start at January 12, 2015, will be dedicated to the situation in the Bornholm Basin. The oceanographers presume that until then the inflow water will have reached the Western part of it.

Contact:
Dr. Volker Mohrholz, Department Physical Oceanography, Leibniz Institute for Baltic Sea Research Warnemünde phone: +49 381 5197 198
Dr. Michael Naumann, Sektion Department Physical Oceanography, Leibniz Institute for Baltic Sea Research Warnemünde, phone: +49 381 5197 267
Dr. Günther Nausch, Department Marine Chemistry, Leibniz Institute for Baltic Sea Research Warnemünde, phone: +49 381 5197 332
Dr. Barbara Hentzsch, Press officer, Leibniz Institute for Baltic Sea Research Warnemünde, phone: +49 381 5197 102

The IOW is a member of the Leibniz Association to which 89 research institutes and scientific infrastructure facilities for research currently belong. The focus of the Leibniz Institutes ranges from Natural, Engineering and Environmental Science to Economic, Social, and Space Sciences and to the humanities. The institutes are jointly financed at the state and national levels. The Leibniz Institutes employ a total of 17.200 people, of whom 8.200 are scientists, of which 3.300 are junior scientists. The total budget of the Institutes is more than 1.5 billion Euros. Third-party funds amount to approximately € 330 million per year.

www.leibniz-gemeinschaft.de 

Dr. Barbara Hentzsch | idw - Informationsdienst Wissenschaft

Weitere Nachrichten aus der Kategorie Geowissenschaften:

nachricht Stärkere Belege für Abschwächung des Golfstromsystems
12.04.2018 | Potsdam-Institut für Klimafolgenforschung

nachricht Waldbrände in Kanada sorgen für stärkste jemals gemessene Trübung der Stratosphäre über Europa
12.04.2018 | Leibniz-Institut für Troposphärenforschung e. V.

Alle Nachrichten aus der Kategorie: Geowissenschaften >>>

Die aktuellsten Pressemeldungen zum Suchbegriff Innovation >>>

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

Im Focus: Verbesserte Stabilität von Kunststoff-Leuchtdioden

Polymer-Leuchtdioden (PLEDs) sind attraktiv für den Einsatz in großflächigen Displays und Lichtpanelen, aber ihre begrenzte Stabilität verhindert die Kommerzialisierung. Wissenschaftler aus dem Max-Planck-Institut für Polymerforschung (MPIP) in Mainz haben jetzt die Ursachen der Instabilität aufgedeckt.

Bildschirme und Smartphones, die gerollt und hochgeklappt werden können, sind Anwendungen, die in Zukunft durch die Entwicklung von polymerbasierten...

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gammastrahlungsblitze aus Plasmafäden

Neuartige hocheffiziente und brillante Quelle für Gammastrahlung: Anhand von Modellrechnungen haben Physiker des Heidelberger MPI für Kernphysik eine neue Methode für eine effiziente und brillante Gammastrahlungsquelle vorgeschlagen. Ein gigantischer Gammastrahlungsblitz wird hier durch die Wechselwirkung eines dichten ultra-relativistischen Elektronenstrahls mit einem dünnen leitenden Festkörper erzeugt. Die reichliche Produktion energetischer Gammastrahlen beruht auf der Aufspaltung des Elektronenstrahls in einzelne Filamente, während dieser den Festkörper durchquert. Die erreichbare Energie und Intensität der Gammastrahlung eröffnet neue und fundamentale Experimente in der Kernphysik.

Die typische Wellenlänge des Lichtes, die mit einem Objekt des Mikrokosmos wechselwirkt, ist umso kürzer, je kleiner dieses Objekt ist. Für Atome reicht dies...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

Im Focus: Wie schwingt ein Molekül, wenn es berührt wird?

Physiker aus Regensburg, Kanazawa und Kalmar untersuchen Einfluss eines äußeren Kraftfeldes

Physiker der Universität Regensburg (Deutschland), der Kanazawa University (Japan) und der Linnaeus University in Kalmar (Schweden) haben den Einfluss eines...

Alle Focus-News des Innovations-reports >>>

Anzeige

Anzeige

VideoLinks
Industrie & Wirtschaft
Veranstaltungen

Internationale Konferenz zur Digitalisierung

19.04.2018 | Veranstaltungen

124. Internistenkongress in Mannheim: Internisten rücken Altersmedizin in den Fokus

19.04.2018 | Veranstaltungen

DFG unterstützt Kongresse und Tagungen - Juni 2018

17.04.2018 | Veranstaltungen

VideoLinks
Wissenschaft & Forschung
Weitere VideoLinks im Überblick >>>
 
Aktuelle Beiträge

Internationale Konferenz zur Digitalisierung

19.04.2018 | Veranstaltungsnachrichten

Auf dem Weg zur optischen Kernuhr

19.04.2018 | Physik Astronomie

Verbesserte Stabilität von Kunststoff-Leuchtdioden

19.04.2018 | Biowissenschaften Chemie

Weitere B2B-VideoLinks
IHR
JOB & KARRIERE
SERVICE
im innovations-report
in Kooperation mit academics