{ "title": "Frosted Gully Landforms", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2020-09-22/ESP_027647_1395.jpg", "excerpt": "In the Martian winter, carbon dioxide frost can build up in the gullies, especially on the cold slopes that face the pole." }, "version": "1.5", "identifier": "ESP_027647_1395", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 22 September 2020" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "Frosted Gully Landforms" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "An enhanced color cutout showing detail of the gullies and the mostly carbon dioxide frost that appears as blue. Less than 1 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-09-22/ESP_027647_1395.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


This image shows a crater wall in the Southern Hemisphere, with gully landforms.

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Gullies like these are mostly found in the mid-latitudes, between 30 to 50 degrees north or south. In the Martian winter, frost (mostly carbon dioxide) can build up in the gullies, especially on the cold slopes that face the pole.

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The bright, bluish (enhanced-color) frost can be clearly seen in the upper alcoves of gullies here. We now know that Martian gullies are active, and that most changes occur in the winter. It is likely that frost like this causes the activity in some way.

" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "A fuller view of the scene. Less than 5 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-09-22/ESP_027647_1395-2.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


ID: ESP_027647_1395
date: 19 June 2012
altitude: 251 km

NASA/JPL/UArizona

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