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21 to 30 of 2,879 Results
Unraveling Geologic Processes and Aqueous Alteration at Tyrrhena Terra, MarsEmbargoed
Apr 30, 2024
Joana Voigt, 2024, "Unraveling Geologic Processes and Aqueous Alteration at Tyrrhena Terra, Mars", https://doi.org/10.48577/jpl.OXSPKN, JGR: Planets, JPL Open Repository
The central eastern Tyrrhena Terra region of Mars contains abundant aqueously altered minerals including Fe/Mg-smectites, smectite/chlorite mixtures, chlorites, zeolites, and carbonates. This study relates detections of these alteration-generated materials with mafic outcrops, ge...
Day/Night Differences in Molecular Oxygen in the Martian Upper AtmosphereEmbargoed
Apr 29, 2024
Ashwin Braude, 2024, "Day/Night Differences in Molecular Oxygen in the Martian Upper Atmosphere", https://doi.org/10.48577/jpl.FBNIHU, Journal of Geophysical Research: Planets, JPL Open Repository
We use the extensive stellar occultation dataset of the Imaging Ultraviolet Spectrograph21 (IUVS) aboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft to22 determine the first quantification of vertical variation in O2 mole fraction separately for23 day and night...
The reduced net carbon uptake over northern hemisphere land causes the close-to-normal CO2 growth rate in 2021 La NiñaEmbargoed
Apr 29, 2024
Junjie Liu, 2024, "The reduced net carbon uptake over northern hemisphere land causes the close-to-normal CO2 growth rate in 2021 La Niña", https://doi.org/10.48577/jpl.HLPJIP, Science Advances, JPL Open Repository
La Niña climate anomalies have historically been associated with significant reductions in the atmospheric CO2 growth rate. However, the 2021 La Niña exhibited a unique near-neutral impact on the CO2 growth rate. In this study, we investigate the underlying mechanisms by employin...
Near-infrared vibrational frequencies of HCN, CN, and HNC in N2 and Ar ice matricesEmbargoed
Apr 29, 2024
Edith Fayolle, 2024, "Near-infrared vibrational frequencies of HCN, CN, and HNC in N2 and Ar ice matrices", https://doi.org/10.48577/jpl.WGLPRE, ACS Earth and Space Science, JPL Open Repository
The surfaces of cold objects in the outer Solar System, like those of Kuiper Belt objects, are often dominated by volatile ices such as nitrogen, methane, and carbon monoxide. As these icy surfaces are subjected to a variety of energetic particles and ultraviolet radiation, HCN a...
The TESS-Keck Survey XX: Mass Catalog and Data ReleaseEmbargoed
Apr 29, 2024
Catherine Clark, 2024, "The TESS-Keck Survey XX: Mass Catalog and Data Release", https://doi.org/10.48577/jpl.PBE9NW, Astronomical Journal, JPL Open Repository
The Transiting Exoplanet Survey Satellite (TESS) has discovered thousands of new worlds with TESS52 planet candidates now outnumbering the total number of confirmed planets from Kepler. Owing to53 differences in survey design, TESS continues to provide planets that are more amena...
Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3Embargoed
Apr 25, 2024
Catherine Clark, 2024, "Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3", https://doi.org/10.48577/jpl.BEQHTS, Nature, JPL Open Repository
Located at the bottom of the main-sequence, ultracool dwarf stars are widespread in the solar neighborhood. Nevertheless, their extremely low luminosity has left their planetary population largely unexplored, and only one of them, TRAPPIST- 1, has so far been found to host a tran...
Through-Ice Acoustic Communication for Ocean Worlds ExplorationEmbargoed
Apr 24, 2024
Hyeong Jae Lee, 2024, "Through-Ice Acoustic Communication for Ocean Worlds Exploration", https://doi.org/10.48577/jpl.NI8LQ5, Sensors, JPL Open Repository
Subsurface exploration of ice-covered planets and moons presents communications challenges, because of the need to communicate through several kilometers of ice. The objective of the task is to develop the capability to wirelessly communicate through ice and thus enable the appli...
Is the Radio Source Dipole from NVSS Consistent with the CMB and ΛCDM?Embargoed
Apr 24, 2024
Yun-Ting Cheng, 2024, "Is the Radio Source Dipole from NVSS Consistent with the CMB and ΛCDM?", https://doi.org/10.48577/jpl.FZNBXN, The Astrophyscial Journal, JPL Open Repository
The dipole moment in the angular distribution of the cosmic microwave background (CMB) is thought to originate from the Doppler Effect and our motion relative to the CMB frame. Observations of large-scale structure (LSS) should show a related ``kinematic dipole'' and help test th...
More Frequent Spaceborne Sampling of XCO2 Improves Detectability of Carbon Cycle Seasonal Transitions in Arctic-Boreal EcosystemsEmbargoed
Apr 24, 2024
Nicholas Parazoo, 2024, "More Frequent Spaceborne Sampling of XCO2 Improves Detectability of Carbon Cycle Seasonal Transitions in Arctic-Boreal Ecosystems", https://doi.org/10.48577/jpl.ALTZNF, Geophysical Research Letters, JPL Open Repository
Surface, aircraft, and satellite measurements indicate pervasive cold season CO2 emissions across Arctic regions, consistent with a hyperactive biosphere and increased metabolism in plants and soils. A key remaining question is whether cold season sources will become large enough...
Asteroid Orbit Determination using Gaia FPR: Statistical AnalysisEmbargoed
Apr 24, 2024
Oscar Fuentes Munoz, 2024, "Asteroid Orbit Determination using Gaia FPR: Statistical Analysis", https://doi.org/10.48577/jpl.LXBLGU, Astronomical Journal, JPL Open Repository
The Gaia mission has provided astrometric observations of unprecedented accuracy for more than7 156000 asteroids. The reported astrometric uncertainties are of the order of milliarcseconds, about8 two orders of magnitude smaller than that of traditional ground-based observations....
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