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Space weathering of the Moon from in situ detection
Wu, Yun-Zhao1,2,3; Wang, Zhen-Chao4; Lu, Yu5,6
2019-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume19Issue:4Pages:10
Corresponding AuthorWu, Yun-Zhao(wu@pmo.ac.cn)
AbstractSpace weathering is an important surface process that occurs on the Moon and other airless bodies, especially those that have no magnetic field. The optical effects of the Moon's space weathering have largely been investigated in the laboratory for lunar samples and lunar analogues. However, duplication of pristine regolith on Earth is not possible. Here we report on space weathering from the unique perspective of the "Yutu" rover, which was part of the Chang'e-3 (CE-3) mission, building on our previous work. Measurement of the visually undisturbed uppermost regolith as well as locations that have been affected by rocket exhaust from the spacecraft by the Visible-Near Infrared Spectrometer (VNIS) revealed that the returned samples provide biased information about the pristine lunar regolith. The uppermost surficial regolith is much more weathered than the regolith immediately below, and the finest fraction is rich in space weathered products. These materials are very dark and attenuated throughout the visible and near-infrared (VNIR) wavelengths, hence reducing the reflectance and masking the absorption features. The effects on the spectral slope caused by space weathering are wavelength-dependent: the visible and near-infrared continuum slope (VNCS) increases while the visible slope (VS) decreases. In the visible wavelengths, the optical effects of space weathering and TiO2 are identical: both reduce albedo and blue the spectra. This suggests that a new TiO2 abundance algorithm is needed. Optical maturity indices are related to composition and hence only locally meaningful. Since optical remote sensing can only sense the uppermost few microns of regolith and since this surface tends to be very weathered, the interpretation of surface composition using optical remote sensing data needs to be carefully evaluated. Sampling the uppermost surface is suggested.
KeywordMoon evolution spectroscopic data analysis
DOI10.1088/1674-4527/19/4/51
WOS KeywordLUNAR SOILS ; REFLECTANCE ; CALIBRATION ; IMBRIUM ; GEOLOGY ; IRON
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000463893700003
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/24460
Collection中国科学院紫金山天文台
Corresponding AuthorWu, Yun-Zhao
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210034, Jiangsu, Peoples R China
2.Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China
3.CAS Ctr Excellence Comparat Planetol, Beijing, Peoples R China
4.Nanjing Univ, Inst Surficial Geochem, Dept Earth Sci, Nanjing 210023, Jiangsu, Peoples R China
5.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China
6.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wu, Yun-Zhao,Wang, Zhen-Chao,Lu, Yu. Space weathering of the Moon from in situ detection[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(4):10.
APA Wu, Yun-Zhao,Wang, Zhen-Chao,&Lu, Yu.(2019).Space weathering of the Moon from in situ detection.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(4),10.
MLA Wu, Yun-Zhao,et al."Space weathering of the Moon from in situ detection".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.4(2019):10.
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