{ "title": "A Frosted Impact Crater in Late Northern Winter", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2020-11-26/ESP_032722_2405.jpg", "excerpt": "This image was planned to search for gully activity in the Northern Hemisphere of Mars." }, "version": "1.5", "identifier": "ESP_032722_2405", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 26 November 2020" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "A Frosted Impact Crater in Late Northern Winter" }, { "role": "video", "layout": "fullBleedLayout", "URL": "https://uahirise.org/media/clips/ESP_032722_2405.mp4", "stillURL": "https://static.uahirise.org/anews/2020-11-26/ESP_032722_2405-title.jpg", "accessibilityCaption": "HiClip narration by Tre Gibbs." }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


This image was planned to search for gully activity in the Northern Hemisphere. Changing gullies have so far been documented only in the Southern Hemisphere, where a greater thickness of carbon dioxide frost forms in the winter.

The gullies are active when this frost is present, especially in the late winter and spring as it sublimates. The well-preserved crater here has a bright gully deposit (visible in prior images acquired in late northern summer), which suggests recent activity.

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ID: ESP_032722_2405
date: 20 July 2013
altitude: 308 km (192 mi)

Clip narration by Tre Gibbs

NASA/JPL/UArizona

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