Institution
Jet Propulsion Laboratory
Facility•La Cañada Flintridge, California, United States•
About: Jet Propulsion Laboratory is a facility organization based out in La Cañada Flintridge, California, United States. It is known for research contribution in the topics: Mars Exploration Program & Telescope. The organization has 8801 authors who have published 14333 publications receiving 548163 citations. The organization is also known as: JPL & NASA JPL.
Topics: Mars Exploration Program, Telescope, Galaxy, Coronagraph, Planet
Papers published on a yearly basis
Papers
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TL;DR: This paper examined data continuity between the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (FO) missions over Greenland and Antarctica using independent data from the mass budget method, which calculates the difference between ice sheet surface mass balance and ice discharge at the periphery.
Abstract: We examine data continuity between the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow‐On (FO) missions over Greenland and Antarctica using independent data from the mass budget method, which calculates the difference between ice sheet surface mass balance and ice discharge at the periphery. For both ice sheets, we find consistent GRACE/GRACE‐FO time series across the data gap, at the continental and regional scales, and the data gap is confidently filled with mass budget method data. In Greenland, the GRACE‐FO data reveal an exceptional summer loss of 600 Gt in 2019 following two cold summers. In Antarctica, ongoing high mass losses in the Amundsen Sea Embayment of West Antarctica, the Antarctic Peninsula, and Wilkes Land in East Antarctica cumulate to 2130, 560, and 370 Gt, respectively, since 2002. A cumulative mass gain of 980 Gt in Queen Maud Land since 2009, however, led to a pause in the acceleration in mass loss from Antarctica after 2016.
132 citations
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Belgian Institute for Space Aeronomy1, Spanish National Research Council2, Rutherford Appleton Laboratory3, Open University4, INAF5, Jet Propulsion Laboratory6, Space Science Institute7, University of Winnipeg8, University of Liège9, Polish Academy of Sciences10, Royal Observatory of Belgium11, Tohoku University12, Centre national de la recherche scientifique13, York University14, Goddard Space Flight Center15, Université libre de Bruxelles16, The Catholic University of America17
TL;DR: The NOMAD (Nadir and Occultation for MArs Discovery) spectrometer suite on board the ExoMars Trace Gas Orbiter (TGO) has been designed to investigate the composition of Mars’ atmosphere, with a particular focus on trace gases, clouds and dust as discussed by the authors.
Abstract: The NOMAD (“Nadir and Occultation for MArs Discovery”) spectrometer suite on board the ExoMars Trace Gas Orbiter (TGO) has been designed to investigate the composition of Mars’ atmosphere, with a particular focus on trace gases, clouds and dust. The detection sensitivity for trace gases is considerably improved compared to previous Mars missions, compliant with the science objectives of the TGO mission. This will allow for a major leap in our knowledge and understanding of the Martian atmospheric composition and the related physical and chemical processes. The instrument is a combination of three spectrometers, covering a spectral range from the UV to the mid-IR, and can perform solar occultation, nadir and limb observations. In this paper, we present the science objectives of the instrument and explain the technical principles of the three spectrometers. We also discuss the expected performance of the instrument in terms of spatial and temporal coverage and detection sensitivity.
132 citations
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INAF1, Paris Diderot University2, University of the Basque Country3, University of Oxford4, Russian Academy of Sciences5, University of Padua6, German Aerospace Center7, Jet Propulsion Laboratory8, University of Paris-Sud9, Space Research Centre10, Institut de Physique du Globe de Paris11, Spanish National Research Council12, University of Lisbon13, Polytechnic University of Milan14, University of Amsterdam15, Max Planck Society16
TL;DR: Observations of Venus’ south-polar region are reported, where clouds with morphology much like those around the north pole, but rotating somewhat faster than the northern dipole are seen.
Abstract: Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright 'dipole' feature surrounded by a cold 'collar' at its north pole. The polar dipole is a 'double-eye' feature at the centre of a vast vortex that rotates around the pole, and is possibly associated with rapid downwelling. The polar cold collar is a wide, shallow river of cold air that circulates around the polar vortex. One outstanding question has been whether the global circulation was symmetric, such that a dipole feature existed at the south pole. Here we report observations of Venus' south-polar region, where we have seen clouds with morphology much like those around the north pole, but rotating somewhat faster than the northern dipole. The vortex may extend down to the lower cloud layers that lie at about 50 km height and perhaps deeper. The spectroscopic properties of the clouds around the south pole are compatible with a sulphuric acid composition.
132 citations
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TL;DR: Neutral oxygen in the saturnian system shows variability, and the total number of oxygen atoms peaks at 4 × 1034, which is consistent with initially pure water ice bombarded by meteors.
Abstract: Neutral oxygen in the saturnian system shows variability, and the total number of
oxygen atoms peaks at 4 x 10^(34). Saturn’s aurora brightens in response to solar-wind
forcing, and the auroral spectrum resembles Jupiter’s. Phoebe’s surface shows variable
water-ice content, and the data indicate it originated in the outer solar system.
Saturn’s rings also show variable water abundance, with the purest ice in the
outermost A ring. This radial variation is consistent with initially pure water ice
bombarded by meteors, but smaller radial structures may indicate collisional
transport and recent renewal events in the past 10^7 to 10^8 years.
131 citations
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TL;DR: In this article, the authors measured the bidirectional reflectance in circularly polarized light and found that shadow hiding is the primary cause of the opposition effect in most vegetation canopies and in moist, clumpy soils.
131 citations
Authors
Showing all 9033 results
Name | H-index | Papers | Citations |
---|---|---|---|
B. P. Crill | 148 | 486 | 111895 |
George Helou | 144 | 662 | 96338 |
H. K. Eriksen | 141 | 474 | 104208 |
Charles R. Lawrence | 141 | 528 | 104948 |
W. C. Jones | 140 | 395 | 97629 |
Gianluca Morgante | 138 | 478 | 98223 |
Jean-Paul Kneib | 138 | 805 | 89287 |
Kevin M. Huffenberger | 138 | 402 | 93452 |
Robert H. Brown | 136 | 1174 | 79247 |
Federico Capasso | 134 | 1189 | 76957 |
Krzysztof M. Gorski | 132 | 380 | 105912 |
Olivier Doré | 130 | 427 | 104737 |
Mark E. Thompson | 128 | 527 | 77399 |
Clive Dickinson | 123 | 501 | 80701 |
Daniel Stern | 121 | 788 | 69283 |