Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Eddies Warm Up The Ocean


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 Scientists develop new tool for imprinting biochips
09.03.2018 | Advanced Science Research Center, GC/CUNY

nachricht Combating sulphuric acid corrosion at wastewater plants: Graz scientists develop new solution
23.02.2018 | Technische Universität Graz

All articles from Interdisciplinary Research >>>

The most recent press releases about innovation >>>

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

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

Im Focus: Surveying the Arctic: Tracking down carbon particles

Researchers embark on aerial campaign over Northeast Greenland

On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...

Im Focus: Unique Insights into the Antarctic Ice Shelf System

Data collected on ocean-ice interactions in the little-researched regions of the far south

The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...

Im Focus: ILA 2018: Laser alternative to hexavalent chromium coating

At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.

When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...

Im Focus: Radar for navigation support from autonomous flying drones

At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.

Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

International Virtual Reality Conference “IEEE VR 2018” comes to Reutlingen, Germany

08.03.2018 | Event News

Latest News

Wandering greenhouse gas

16.03.2018 | Earth Sciences

'Frequency combs' ID chemicals within the mid-infrared spectral region

16.03.2018 | Physics and Astronomy

Biologists unravel another mystery of what makes DNA go 'loopy'

16.03.2018 | Life Sciences

Science & Research
Overview of more VideoLinks >>>