Seasonal Flows on Warm Martian Slopes

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Science  05 Aug 2011:
Vol. 333, Issue 6043, pp. 740-743
DOI: 10.1126/science.1204816

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  1. Fig. 1

    RSL on the central structure of Horowitz Crater (32°S, 140.8°E), MRO Primary Science Phase (PSP) image PSP_005787_1475 (LS = 334: late summer). Altimetry map (A) locates the full 5.1-km-wide HiRISE image (B), with the white box indicating the color enlargement (C). Yellow arrows in (B) show some concentrations of RSL within the central peaks and pits. Colors in (C) have been strongly enhanced to show the subtle differences, including light orange streaks (black arrows) in the upper right that may mark faded RSL. North is up on all images in this paper except fig. S4.

  2. Fig. 2

    Impact crater with abundant RSL at 41.6°S, 202.3°E in Newton Basin. (A) is the full HiRISE PSP_005943_1380; arrows point to some concentrations of RSL, and the black box locates the four blowups of orthorectified images (13) showing RSL (dark lines) in the late summer of MY 28 (12) (B), faded by the next very early spring (C), then gradually darkening and reforming in the spring (D) and summer (E) of MY 30. The RSL are located on steep north-to-west–facing slopes associated with bedrock outcrops, often in alcoves. Each image was given a minimum-maximum stretch so that shadows are black and the brightest spots are white.