A5100424116- Planetary Science and Exploration
- Astro and Planetary Science
- Space Science and Extraterrestrial Life
- Space Exploration and Technology
- Isotope Analysis in Ecology
- Spaceflight effects on biology
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Radio Astronomy Observations and Technology
- Advanced Algorithms and Applications
- Antenna Design and Optimization
- Geophysical Methods and Applications
- Remote Sensing and Land Use
- Space Satellite Systems and Control
- Arctic and Antarctic ice dynamics
- Marine and environmental studies
- Soil Moisture and Remote Sensing
- Peatlands and Wetlands Ecology
- Meteorological Phenomena and Simulations
- Environmental and Agricultural Sciences
- Robotics and Automated Systems
- Tropical and Extratropical Cyclones Research
- Aeolian processes and effects
University of Hawaiʻi at Mānoa
2018-2024
University of Hawaii System
2018-2023
Xidian University
2021
Hospital Infantil Joana de Gusmão
2021
Dalian University of Technology
2020
China University of Mining and Technology
2020
Beijing Normal University
2019
Brown University
2013-2018
Northwestern Polytechnical University
2016
Goddard Space Flight Center
2013-2015
The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of environment that would have been suited support a martian biosphere founded on chemolithoautotrophy. This aqueous was characterized by neutral pH, low salinity, variable redox states both iron sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, phosphorus were measured directly as key biogenic elements; inference, is assumed available. probably had...
The Radiation Assessment Detector (RAD) on the Mars Science Laboratory’s Curiosity rover began making detailed measurements of cosmic ray and energetic particle radiation environment surface 7 August 2012. We report discuss absorbed dose equivalent from galactic rays solar particles martian for ~300 days observations during current maximum. These provide insight into hazards associated with a human mission to an anchor point which model subsurface environment, implications microbial survival...
Water ice may be allowed to accumulate in permanently shaded regions on airless bodies the inner solar system such as Mercury, Moon, and Ceres [Watson K, et al. (1961) J Geophys Res 66:3033-3045]. Unlike Mercury Ceres, direct evidence for water exposed at lunar surface has remained elusive. We utilize indirect lighting of permanent shadow report detection diagnostic near-infrared absorption features reflectance spectra acquired by Moon Mineralogy Mapper [M (3)] instrument. Several thousand M...
Samples from the Rocknest aeolian deposit were heated to ~835°C under helium flow and evolved gases analyzed by Curiosity’s Sample Analysis at Mars instrument suite. H 2 O, SO , CO O major released. Water abundance (1.5 3 weight percent) release temperature suggest that is bound within an amorphous component of sample. Decomposition fine-grained Fe or Mg carbonate likely source much . Evolved coincident with Cl, suggesting oxygen produced thermal decomposition oxychloride compound. Elevated...
Volume mixing and isotope ratios secured with repeated atmospheric measurements taken the Sample Analysis at Mars instrument suite on Curiosity rover are: carbon dioxide (CO2), 0.960(±0.007); argon-40 ((40)Ar), 0.0193(±0.0001); nitrogen (N2), 0.0189(±0.0003); oxygen, 1.45(±0.09) × 10(-3); monoxide, < 1.0 (40)Ar/(36)Ar, 1.9(±0.3) 10(3). The (40)Ar/N2 ratio is 1.7 times greater (40)Ar/(36)Ar 1.6 lower than values reported by Viking Lander mass spectrometer in 1976, whereas other are generally...
H 2 O, CO , SO O S, HCl, chlorinated hydrocarbons, NO, and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, amorphous materials. Thermal decomposition carbonates combustion organic materials are candidate sources for . Concurrent evolution hydrocarbons suggests presence oxychlorine phase(s). Sulfides likely...
Observations by the Mars Science Laboratory Mast Camera (Mastcam) in Gale crater reveal isolated outcrops of cemented pebbles (2 to 40 millimeters diameter) and sand grains with textures typical fluvial sedimentary conglomerates. Rounded conglomerates indicate substantial abrasion. ChemCam emission spectra at one outcrop show a predominantly feldspathic composition, consistent minimal aqueous alteration sediments. Sediment was mobilized ancient water flows that likely exceeded threshold...
Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved an approximately average martian crustal composition to one influenced alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion deposition. The absence predicted geochemical variations indicates magnetite phyllosilicates formed diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous...
The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal types along Curiosity rover traverse: a fine-grained mafic type and locally derived, coarse-grained felsic type. component is representative of widespread soils similar in composition to dust. It possesses ubiquitous hydrogen signature spectra, corresponding hydration amorphous phases found by CheMin instrument. This likely accounts for an important fraction global...
Significance We present data supporting the presence of an indigenous source fixed nitrogen on surface Mars in form nitrate. This may indicate first stage development a primitive cycle ancient and would have provided biochemically accessible nitrogen.
Spectral reflectance data are used to determine the formation, distribution, and variation of water across lunar surface.
"Jake_M," the first rock analyzed by Alpha Particle X-ray Spectrometer instrument on Curiosity rover, differs substantially in chemical composition from other known martian igneous rocks: It is alkaline (>15% normative nepheline) and relatively fractionated. Jake_M compositionally similar to terrestrial mugearites, a type typically found at ocean islands continental rifts. By analogy with these comparable rocks, could have been produced extensive fractional crystallization of primary or...
By analogy with Earth, methane in the Martian atmosphere is a potential signature of ongoing or past biological activity. During decade, Earth-based telescopic observations reported "plumes" tens parts per billion by volume (ppbv), and those from Mars orbit showed localized patches, prompting speculation sources subsurface bacteria nonbiological sources. From situ measurements made Tunable Laser Spectrometer (TLS) on Curiosity using distinctive spectral pattern specific to methane, we report...
We report analysis results of the reflectance spectra (0.48 to 3.2 μm) acquired by Chang’E-5 lander, which provides vital context returned samples from Northern Oceanus Procellarum Moon. estimate up 120 parts per million (ppm) water (OH + H2O) in lunar regolith, is mostly attributed solar wind implantation. A light-colored and surface-pitted rock (named as CE5-Rock) evident near lander. The suggest that CE5-Rock could be transported an older basalt unit. exhibits a stronger absorption, 2.85...
Abstract One of the important mechanisms for stabilization soil organic carbon (SOC) is its spatial inaccessibility microbial biodegradation within aggregates. However, little has been documented regarding aggregate stability with grassland degradation in alpine region Qinghai‐Tibetan Plateau (QTP). In this study, we used physical and density fractions to elucidate differences SOC non‐degraded degraded grasslands two biomes, meadow steppe QTP. There were considerable between chemical...
Abstract Radiance measured by the Moon Mineralogy Mapper (M 3 ) at wavelengths beyond ~2 µm commonly includes both solar reflected and thermally emitted contributions from lunar surface. Insufficient correction (removal) of thermal contribution can modify even mask absorptions these in derived surface reflectance spectra, an effect that precludes accurate identification analysis OH and/or H 2 O absorptions. This study characterized effects M data evaluating temperatures independently Lunar...
Hematite (Fe2O3) is a common oxidization product on Earth, Mars, and some asteroids. Although oxidizing processes have been speculated to operate the lunar surface form ferric iron-bearing minerals, unambiguous detections of minerals forming under highly reducing conditions Moon remained elusive. Our analyses Mineralogy Mapper data show that hematite, mineral, present at high latitudes Moon, mostly associated with east- equator-facing sides topographic highs, more prevalent nearside than...
The Moon is generally depleted in volatile elements and this depletion extends to the surface where most abundant mineral, anorthite, features <6 ppm H2O. Presumably other nominally anhydrous minerals that dominate mineral composition of global surface—olivine pyroxene—are similarly water volatiles. Thus tabula rasa for study volatiles introduced wake its origin. Since formation last major basin (Orientale), from solar wind, impactors all sizes, expelled interior during volcanic eruptions...
Abstract The exploration of the lunar south polar region and ground truthing volatiles is one top priorities for several space agencies private partners. Here we use Moon Mineralogy Mapper surficial water ice detections to investigate location water-ice-bearing permanently shaded regions (PSRs) near pole. We extract a variety parameters such as their temperature regime, slope, hydrogen content, number detections, depth stability dry ice, mobility aspects. identify 169 PSRs characteristics...
Abstract Water ice, abundant in the outer solar system, is volatile inner system. On largest airless bodies of system (Mercury, Moon, Ceres), water can be an exospheric species but also occurs its condensed form. Mercury hosts ice deposits permanently shadowed regions near poles that act as cold traps. present on where these polar are great interest context future lunar exploration. The surface releases either OH or H 2 O during meteoroid showers, and both generated by reaction implanted...
The main objective of this work is to quantify lunar surface minerals (agglutinate, clinopyroxene, orthopyroxene, plagioclase, olivine, ilmenite, and volcanic glass), particle sizes, the abundance submicroscopic metallic Fe (SMFe) from Lunar Soil Characterization Consortium (LSCC) data set with Hapke's radiative transfer theory. mode implemented for both forward inverse modeling. We implement theory in which, instead commonly used look‐up tables, Newton's method least squares are jointly...