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Planes flying at high latitudes can travel through clouds of high cosmic radiation

The uncertainty of science: Researchers have found evidence that suggests that planes flying at higher latitudes can sometimes fly through concentrated pockets of high cosmic radiation.

“We have flown radiation sensors onboard 264 research flights at altitudes as high as 17.3 km (56,700 ft) from 2013 to 2017,” says Kent Tobiska, lead author of the paper and PI of the NASA-supported program Automated Radiation Measurements for Aerospace Safety (ARMAS). “On at least six occasions, our sensors have recorded surges in ionizing radiation that we interpret as analogous to localized clouds.”

…Conventional wisdom says that dose rates should vary smoothly with latitude and longitude and the height of the aircraft. Any changes as a plane navigates airspace should be gradual. Tobiska and colleagues have found something quite different, however: Sometimes dose rates skyrocket for no apparent reason. “We were quite surprised to see this,” says Tobiska.

All of the surges they observed occurred at relatively high latitudes, well above 50 degrees in both hemispheres. One example offered in their paper is typical: On Oct 3, 2015, an NSF/NCAR research aircraft took off from southern Chile and flew south to measure the thickness of the Antarctic ice shelf. Onboard, the ARMAS flight module recorded a 2x increase in ionizing radiation for about 30 minutes while the plane flew 11 km (36,000 feet) over the Antarctic Peninsula. No solar storm was in progress. The plane did not abruptly change direction or altitude. Nevertheless, the ambient radiation environment changed sharply. Similar episodes have occurred off the coast of Washington state.

The theories proposed to explain this at the link are not very convincing, and suggest to me that they really do not know what causes this. All we do know is that it likely associated with the interaction of the Earth’s magnetic field and cosmic radiation.

Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 
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3 comments

  • LocalFluff

    Cosmic (and Solar) rays are treated as noise when they cause dots and lines of saturated pixels in telescopes, which they always do so there’s alot of potential data about it. But I heard an interview with an astronomer who specializes on investigating cosmic rays. He complained that all of his colleagues always did their best to erase all of the data he was interested in!!! :-P

  • ABQ Bill

    As a captain for that airline HQ’d in Atlanta, I always tried to fly below 31,000 ft when I could. SR-71 tests done decades ago showed a huge spike in radiation levels above 31K.
    When solar storm activity was present, I tried to fly below 31K.

    Too much of that exposure over a lifetime career can be nasty. At 65, I’m as healthy as can be, and on no meds. Hopefully my precautions were not in vain.

  • se jones

    The BDRG instrument on Lomonosov may be seeing these phenomena as well. This is just a qualified “maybe” as my Russian is poor and I’m waiting on some papers to show up.

    By the way, the gif animations of images from Lamonosov’s ShOK cameras are just wonderful, amazing and mesmerizing.

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