Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL080077 |
Challenges in the Search for Perchlorate and Other Hydrated Minerals With 2.1-mu m Absorptions on Mars | |
Leask, E. K.1; Ehlmann, B. L.1,2; Dundar, M. M.3; Murchie, S. L.4; Seelos, F. P.4 | |
2018-11-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:22页码:12180-12189 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A previously unidentified artifact has been found in Compact Reconnaissance Imaging Spectrometer for Mars targeted I/F data. It exists in a small fraction (<0.05%) of pixels within 90% of images investigated and occurs in regions of high spectral/spatial variance. This artifact mimics real mineral absorptions in width and depth and occurs most often at 1.9 and 2.1 mu m, thus interfering in the search for some mineral phases, including alunite, kieserite, serpentine, and perchlorate. A filtering step in the data processing pipeline, between radiance and I/F versions of the data, convolves narrow artifacts (spikes) with real atmospheric absorptions in these wavelength regions to create spurious absorption-like features. The majority of previous orbital detections of alunite, kieserite, and serpentine we investigated can be confirmed using radiance and raw data, but few to none of the perchlorate detections reported in published literature remain robust over the 1.0- to 2.65-mu m wavelength range. Plain Language Summary Many minerals can be identified with remote sensing data by their characteristic absorptions in visible-shortwave infrared data. This type of data has allowed geological interpretation of much of Mars' surface, using satellite-based observation. We have discovered an issue with the Compact Reconnaissance Imaging Spectrometer for Mars instrument's data processing pipeline. In similar to<0.05% of pixels in almost all images, noise in the data is smoothed in such a way that it mimics real mineral absorptions, falsely making it look as though certain minerals are present on Mars' surface. The vast majority of previously identified minerals are still confirmed after accounting for the artifact, but some to all perchlorate detections and a few serpentine detections were not confirmed, suggesting that the artifact created false detections. This means concentrated regions of perchlorate may not occur on Mars and so may not be available to generate possibly habitable salty liquid water at very cold temperatures. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453250000010 |
WOS关键词 | RECURRING SLOPE LINEAE ; REFLECTANCE ; PHYLLOSILICATES ; SALTS ; CRISM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27130 |
专题 | 气候变化 |
作者单位 | 1.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.Indiana Univ Purdue Univ, Comp & Informat Sci Dept, Indianapolis, IN 46202 USA; 4.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA |
推荐引用方式 GB/T 7714 | Leask, E. K.,Ehlmann, B. L.,Dundar, M. M.,et al. Challenges in the Search for Perchlorate and Other Hydrated Minerals With 2.1-mu m Absorptions on Mars[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(22):12180-12189. |
APA | Leask, E. K.,Ehlmann, B. L.,Dundar, M. M.,Murchie, S. L.,&Seelos, F. P..(2018).Challenges in the Search for Perchlorate and Other Hydrated Minerals With 2.1-mu m Absorptions on Mars.GEOPHYSICAL RESEARCH LETTERS,45(22),12180-12189. |
MLA | Leask, E. K.,et al."Challenges in the Search for Perchlorate and Other Hydrated Minerals With 2.1-mu m Absorptions on Mars".GEOPHYSICAL RESEARCH LETTERS 45.22(2018):12180-12189. |
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