File:Cool as Ice - Flickr - UAHiRISE (NASA).jpg

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Every winter, a layer of carbon dioxide frost (dry ice) forms on the surface of Mars. At its greatest extent in mid-winter, this frost reaches from the poles down to the middle latitudes, until it is too warm and sunny to persist. In most places this is around 50 degrees latitude, similar to the latitude of southern Canada on Earth.

However, small patches of dry ice are found closer to the equator on pole-facing slopes, which are colder because they receive less sunlight. This image was taken in the middle of winter in Mars’ Southern Hemisphere, and shows a crater near 37 degrees south latitude. The south-facing slope has patchy bright frost, blue in enhanced color. This frost occurs in and around the many gullies on the slope, and in other images, has caused flows in the gullies. (Image is less than 1 km across and is 254 km above the surface.)

uahirise.org/ESP_072381_1430

NASA/JPL/UArizona
Date Taken on 17 March 2022, 10:32
Source Cool as Ice
Author UAHiRISE (NASA)
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mars, nasa, mro, jpl, lpl, hirise, ua, uarizona, university of arizona, science, astronomy, geology, landscape

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Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

This image was originally posted to Flickr by UAHiRISE (NASA) at https://flickr.com/photos/71688597@N05/51944057441. It was reviewed on 22 March 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero.

22 March 2022

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current01:03, 22 March 2022Thumbnail for version as of 01:03, 22 March 20222,560 × 1,920 (2.39 MB)Red panda bot (talk | contribs)In Flickr Explore: 2022-03-18

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