Researchers show that dynamic spikes aren’t just for albatrosses

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New research shows how small seabirds have mastered techniques to work smarter and smarter when they soar in the ocean.

New research announced today Science Advances It proves that albatrosses are not the only ones to perform the aerial acrobatics needed to soar dynamically in the windy open ocean. Studies show that a smooth seabird called the Manx Shearwater can fly in the waters around the UK as well.

Albatross glides in the movement of a cork bottle opener and collects energy from the gradient of the wind above the surface of the sea. At sea level, the wind gets faster with height.This harvesting method Wind energy Saving effort is called dynamic soaring and explains that albatrosses can travel thousands of miles in the ocean with their wings barely flapping.

Use of bird mediation Video camera GPS loggers, researchers at the University of Oxford’s Department of Biology, show that Manx Shearwaters also use dynamic ascent. The main difference is that by flapping the wings as part of the cycle, shear water can perform the same flight in light winds.

The weave and undulating flight characteristic of dynamic soaring was first scientifically described in 1883 and was noted by Leonardo da Vinci nearly 400 years ago. However, it remains a very difficult phenomenon to prove.

“Experimental demonstrations of birds harvesting energy from wind shear gradients are extremely difficult, especially in flap gliding. bird “We have developed a new way to calculate energy harvesting by modeling the shape of the flight trajectory in relation to the wind, like shear water,” said James Kempton, co-lead author of the study. I am saying.

Researchers analyzed video footage recorded from behind shear water skimming the Irish Sea at high speeds. Using this, by calculating the movement of the bird’s weave and swell with respect to the wind, the research team uses a dynamic rise to draw energy from the wind, rather than the shear water consuming its own energy. I was able to identify when to harvest.

GPS loggers provided behavioral data for more than 200 birds in preferred directions of movement in different wind conditions. Analysis of these GPS data not only allows shear water to be harvested using dynamic spikes, but also energy From the wind like AlbatrossThey also actively chose conditions that offered the opportunity to work smarter than hard.

“When the winds are strong, shear water actively moves in the direction of utilizing those winds for their greatest energetic benefits,” said Dr. Joe Win, co-lead author of the paper. “But this is only seen on outbound flights for feeding, not when the bird needs to return to the colony, regardless of the prevailing winds.”

Unlike previous approaches for analyzing dynamic soaring, the approach developed by the author is traditionally associated with dynamic soaring, such as seagulls and falcons, which may use the same flight technique less prominently. Even non-seagulls can be applied to different species.

“Our results show that we can save energy by weaving in very weak winds, as long as we don’t spare a little effort to get big rewards,” said senior author Graham Taylor. I am. “The fact that Manx Shearwaters do this suggests that small drones can pull the same tricks and stretch them. Flight Range and duration when patrolling the British coastal waters. ”

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For more information:
James A. Kempton et al, Flap gliding Seabirds’ dynamic soaring optimization affects large-scale distribution in the ocean. Science Advances (2022). DOI: 10.1126 / sciadv.abo0200

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Quote: Researchers have found that the dynamic surge was obtained from https: // on June 1, 2022 (6 2022). It shows that it is not just for the 1st of the month)

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Researchers show that dynamic spikes aren’t just for albatrosses

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