cirrus

The most likely explanation is the presence of thick but uneven water ice clouds, similar to cirrus clouds high in Earth's atmosphere -- an unexpected complication.

From Science Daily ● Apr. 22, 2026

Sun halos are optical illusions created when ice crystals form in the correct shape in the upper atmosphere, usually accompanying thin, wispy cirrus clouds.

From New York Times ● Apr. 15, 2024

The remaining, thinner cirrus clouds would allow more long-wave radiation emanating from Earth to escape to space.

From Scientific American ● Sep. 20, 2023

The wind-shear phenomenon can occur in wispy cirrus clouds or even clear air near thunderstorms, as differences in temperature and pressure create powerful currents of fast-moving air.

From Seattle Times ● Dec. 19, 2022

It was still clear, but a thin, wispy scum of cirrus had spread across the upper atmosphere, and a dark line of squalls was visible just above the southwestern horizon.

From "Into the Wild" by Jon Krakauer

Pedicels of the first four cirri, caudal appendages, penis, the two posterior thoracic segments, the segments of the cirri, and the trophi, clouded, banded, or spotted, with blackish purple.

From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin

The reader will find in the general plates representations of several kinds of cirri.

From The Philosophy of the Weather And a Guide to Its Changes by Thomas Belden Butler

All the five posterior pair of cirri resemble each other more closely than is usual.

From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin

Finally, I may remark that the whole of the body and the cirri are capable of many diversified movements.

From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin

Body and cirri, either nearly white or pale purplish-lead colour, with the arms of the second, third, and fourth cirri, and pedicels of the fifth and sixth, more or less tinted with orange.

From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin