Home
Weather Dublin
WeatherRadar
RainfallRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
    Home / Editor's Pick /

    Von Kármán and plankton: Vortices captured in the sky and sea

12:00
26 November 2023

Von Kármán and plankton
Vortices captured in the sky and sea

Swirls in cloud and ocean bloom satellite shot
This satellite shot was captured close to the south of Norway's remote archipelago of Svalbard. - © NASA

Two prime examples of fluid dynamics were captured from above earlier this year in a remote part of the far north.

Seen in July, south of Norway's Svalbard archipelago, NASA satellites caught the simultaneous events in the air and ocean with von Kármán vortices above, and a colourful swirling plankton bloom below.

Von Kármán vortices form when air masses have to flow around towering obstacles, as is the case with Bear Island which has a highest elevation point of over 1,700 metres.

In the process, the air swirls downstream of the islands and forms counter-rotating vortices at the edges of the wind shadow zones created by the mountains.

These disturbances of the air currents are also transferred to the clouds, where they become visible as vortex structures.

Make the most of the WindRadarread more

Meanwhile, colourful phytoplankton blooms flowed in the ocean currents of the Norwegian and Barents Sea close by.

Phytoplanktons are microscopic organisms which like land plants absorb carbon dioxide and release oxygen. In isolation, their presence is not a negative sign, but large blooms can block sunlight from reaching ocean life living in their shadow below.

A bloom can last days or weeks depending on how long their source of nutrition sustains their growth. Once a bloom consumes all the available food, the plankton die and sink below the surface.

When viewed from above their appearance can also help highlight eddies and currents of the area they are in.

Ryan Hathaway
More on the topic
Satellite weather map of the UK and western Europe showing rain bands across Britain, a rain cloud icon over Scotland, and a thunderstorm icon near Belgium and northern France on Wednesday 13.05.
Wednesday 13 May 2026

Hail also possible

Thunderstorm risk for parts of the UK
The image shows the central Pacific in a computer model. A striking feature is the ocean coloured red, which indicates very warm seawater.
Wednesday 6 May 2026

Temperature records?

El Niño is gaining momentum
On the left, a map of Europe shows temperature anomalies in April, with positive values in Western Europe and negative values in Eastern Europe. On the right, an industrial area can be seen, with chimneys and trees in the foreground.
Friday 8 May 2026

Record in Spain

Third warmest April on record
All weather news
This might also interest you
Split image showing strong winds over the UK on a forecast map and widespread rain and snow on a weather radar map.
Tuesday 27 January 2026

Severe gales & heavy rain

Storm Chandra makes impact
plit image showing a double rainbow over a rocky shoreline on the left and sheep grazing in a green field under stormy clouds on the right.
Sunday 2 November 2025

Your weather - Your shots

Mixed conditions on an unsettled week
Illustration of white and yellow fireworks on a blue background.
Wednesday 31 December 2025

Hello 2026

Happy New Year
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy Policy Legal info Accessibility statement

Services

Uploader

Socials

facebooktwitteryouTubelinkList