Polar winds stream off the ice cap (THEMIS_IOTD_20180405)

This VIS image shows 'streamers' of clouds created by katabatic winds at the north polar cap. Katabatic winds are created by cold air sinking at the pole and then speeding along the ice surface towards the edge of the polar cap.

When the winds enter troughs in the ice cap the wind regime changes from laminar (smooth) flow to chaotic, and clouds of ice particles and/or dust are picked up and carried along. This wind activity peaks at the start of northern hemisphere summer.

This martian scene spans 1.6 x 4.9 kilometers (1 x 3 miles). To see where on Mars this area lies, and to download high-resolution versions of the image, go to themis.asu.edu/zoom-20180405a

See the Red Planet Report at redplanet.asu.edu for updates on Mars research and exploration. For more about Mars geology, check out the Mars-ePedia: marsed.asu.edu/marsepedia

For the latest THEMIS Mars images as received by mission scientists, see themis.asu.edu/livefrommars. To learn more about the THEMIS camera and its Mars images, see themis.asu.edu.

This image is in the public domain and may be republished free of charge, but if used it should be credited as NASA/JPL-Caltech/Arizona State University.

Taken on: April 5, 2018

Tags:

north polar ice cap

katabatic winds

THEMIS

Thermal Emission Imaging System

ASU

Arizona State University

MSFF

Mars Space Flight Facility

NASA

Mars Odyssey

Philip Christensen

School of Earth and Space Exploration

SESE

Mars

marswatch « less

Sets appears in: • Mars Images of the Day

Groups appears in: • Space Exploration • Mars Watch more » • Astronomy, Stars, Planets and Space • Sol System • Solar system and planets « less

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