Fig. 6 | Scientific Reports

Fig. 6

From: Time-series variations of recurring slope lineae on Mars compatible with contemporary water activity from bedrock aquifer melting

Fig. 6

Time-series variations in spectral signatures of hydrated salts in RSL at Palikir crater. (a) Overview of the study area in Palikir crater, with the blue box indicating CRISM coverage; (b) CRISM data in summer (FRT0002038F, Ls: 359°) with sampling points in RSL; (c) CRISM data in autumn (FRS00037F73, Ls: 35°) with the same sampling points; (d) HiRISE image in summer for reference; (e) Spectra of the sampling points from the CRISM summer data, indicating the presence of hydrated salts; (f) Spectra of the same sampling points from the CRISM autumn data showing no obvious absorption features related to hydrated salts; (e,f) fine lines - per pixel spectra, and bold lines - mean of per pixel analysis; (g) Laboratory spectra of relevant hydrated salts for reference53. The software ArcGIS 10.6 (https://www.esri.com/) was used to create the maps in (a–d).

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