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
Typhoon warning for China. Up to 500 mm of rain. . . Friday 24 July 2026
Weather map of the southern Chinese coast and Taiwan showing a powerful tropical cyclone. The eye of the storm is located near the coastal city of Shantou in the Chinese province of Guangdong. Around the centre, intense shades of red, pink and violet indicate gale-force winds, whilst a large orange wind field extends as far as the west coast of Taiwan. An overlaid windsack warning sign indicates dangerous storm winds. Cities such as Hong Kong, Guangzhou, Xiamen, Taipei and Taichung are shown, as are wind speeds and white flow lines illustrating the cyclonic air circulation.
Friday 24 July 2026

Up to 500 mm of rain

Typhoon warning for China
Rain returns to end dry spell in places. Jet stream delivery. . . Thursday 23 July 2026
Split weather graphic showing widespread showers across the UK and Ireland on the left, and a wind forecast map on the right with a windsock icon and gusts of 25 to 35 mph, highlighting breezy conditions across the two countries.
Thursday 23 July 2026

Jet stream delivery

Rain returns to end dry spell in places
New heatwave in southern Europe. Up to 45 degrees in Spain. . . Tuesday 21 July 2026
Split temperature map showing extreme heat across Spain on the left and Greece on the right, with temperatures reaching 44°C near Murcia, around 40°C in parts of Greece, and a large thermometer icon highlighting dangerous heat.
Tuesday 21 July 2026

Up to 45 degrees in Spain

New heatwave in southern Europe
All weather news
This might also interest you
Seasonal warmth between spring thunder. Your weather - Your shots. . . Sunday 19 April 2026
Split image showing coastal sunset with layered lenticular clouds over rooftops and palm trees on the left, and a green valley with river and hills under soft daylight on the right.
Sunday 19 April 2026

Your weather - Your shots

Seasonal warmth between spring thunder
Historic Storm Éowyn arrives. On this day.... . . Saturday 24 January 2026
Split image showing a person in a yellow jacket struggling against strong winds and heavy rain on a street at night on the left, and an Irish wind forecast map on the right with red and purple shading, gusts up to 75 mph, and a wind warning icon, divided by a curved white line.
Saturday 24 January 2026

On this day...

Historic Storm Éowyn arrives
Flooding, gales, and heavy snow. Storm Chandra. . . Tuesday 27 January 2026
Split image showing aerial flooding in a town with muddy water covering roads on the left, and a rural road on the right blocked by heavy snowfall with vans stopped and a person walking in snow.
Tuesday 27 January 2026

Storm Chandra

Flooding, gales, and heavy snow
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