Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Eddies Warm Up The Ocean

20.02.2002


Eddies appear in the ocean like in the atmosphere. Atmospheric eddies are short-lived, extremely speedy, and often very hazardous. Oceanic eddies are slower and can be observed only with the use of special equipment, but these eddies gently mixing ocean waters affect the climate in general.



For more than ten years specialists from the Pacific Institute of Oceanology in Vladivostok have observed the oceanic eddies formed at the confluence of two largest undercurrents in the west of the Pacific Ocean, Kuroshio and Oyashio. These eddies are generated to the east of Japan and move to the north along the Kuril-Kamchatka Trench involving water masses from the bottom to the surface.

The velocity of eddies is not high, about 1 cm per second, and their lifetime is several months. At a depth of 400-600 meters, there is a `core` of the eddy, i.e., the water captured at the time of its birth and transported to a significant distance.


The scientists noticed that periodic cataclysms occurred in the Far East within the last quarter of the past century. For instance, there was a severe drought in the Primorsky Territory in 1976, then the amount of precipitation increased year by year and reached a maximum in 1992. The next drought occurred in 1997 and it was followed by an increase in precipitation and strong floods of 2000. That year was marked by the greatest sum of precipitation for the whole period of observations in Japan and Korea since the 19th century. More than 80 cm of precipitation fell within a period of two days in summer. Approximately the same amount of precipitation falls in Vladivostok annually.

Another record was established in the late autumn of 2000, when a very deep cyclone with a pressure of 950 millibar in the center appeared in the northwest of the Pacific Ocean. It caused the wreck of the Vladivostok motor ship "Ryazan" in the Bering Sea on November 6, 2000. Apparently, such accidents on the earth are connected with the global warming.

And what happens to the ocean at the present time? It becomes warmer in its Arctic regions, as is proved by the results of measurements. And not only currents are responsible for that, but also eddies carrying heat and salt of deep layers of the ocean from the south to the north, as the humidity of an area directly depends on these characteristics. On the basis of unique observations on eddies from Russian, Canadian, and Japanese ships, the scientists established that the eddies brought the increasing amounts of warm salty water from the southern parts of the ocean, and their dimensions and velocities grew considerably within the last decade. One of the eddies was an old-timer, it was moving along the Kuril-Kamchatka Trench to the northeast for a period of 5 years since 1986. What served as its energy source still remains a mystery.

Tatiana Pitchugina | alphagalileo

More articles from Interdisciplinary Research:

nachricht Easier Diagnosis of Esophageal Cancer
06.03.2017 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Sandia uses confined nanoparticles to improve hydrogen storage materials performance
27.02.2017 | DOE/Sandia National Laboratories

All articles from Interdisciplinary Research >>>

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 >>>