A. Adriani
A5106233641- Astro and Planetary Science
- Planetary Science and Exploration
- Atmospheric Ozone and Climate
- Space Exploration and Technology
- Isotope Analysis in Ecology
- Atmospheric chemistry and aerosols
- Ionosphere and magnetosphere dynamics
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Geomagnetism and Paleomagnetism Studies
- Geology and Paleoclimatology Research
- Spectroscopy and Laser Applications
- Spacecraft and Cryogenic Technologies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Astronomical Observations and Instrumentation
- Meteorological Phenomena and Simulations
- Calibration and Measurement Techniques
- Space Satellite Systems and Control
- Laser-induced spectroscopy and plasma
- Spacecraft Design and Technology
- Aerospace Engineering and Energy Systems
Institute for Space Astrophysics and Planetology
2016-2025
National Institute for Astrophysics
2016-2025
Institute of Atmospheric Sciences and Climate
1998-2008
Space (Italy)
2003-2006
Centre de Gestion Scientifique
1999
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
1992-1993
On 27 August 2016, the Juno spacecraft acquired science observations of Jupiter, passing less than 5000 kilometers above equatorial cloud tops. Images Jupiter's poles show a chaotic scene, unlike Saturn's poles. Microwave sounding reveals weather features at pressures deeper 100 bars, dominated by an ammonia-rich, narrow low-latitude plume resembling deeper, wider version Earth's Hadley cell. Near-infrared mapping relative humidity within prominent downwelling regions. Juno's measured...
A comprehensive investigation of polar stratospheric clouds was performed on 25 January 2000 with instruments onboard a balloon gondola flown from Kiruna, Sweden. Cloud layers were repeatedly encountered at altitudes between 20 and 24 kilometers over wide range atmospheric temperatures (185 to 197 kelvin). Particle composition analysis showed that large fraction the cloud composed nitric acid trihydrate (NAT) particles, containing water molar ratio 3:1; this confirmed these long-sought solid...
Different definitions for estimating the degree of changes in signal polarization measured by lidar measurements are used both to detect presence nonspherical aerosol particles and estimate their shape density. Our aim is provide a tool calculation interpretation that due backscatter technique. An overview several techniques calculate linear depolarization from two-channel given. Advantages disadvantages each method analyzed when we apply them on vertical profile. Systematic errors also...
In this paper, we analyze the strong unidentified emission near 3.28 μm in Titan's upper daytime atmosphere recently discovered by Dinelli et al. We have studied it using NASA Ames PAH IR Spectroscopic Database. The polycyclic aromatic hydrocarbons (PAHs), after absorbing UV solar radiation, are able to emit strongly 3.3 μm. By current models for redistribution of absorbed energy, explained observed spectral feature and derived vertical distribution abundances atmosphere. PAHs been found be...
The Juno spacecraft acquired direct observations of the jovian magnetosphere and auroral emissions from a vantage point above poles. Juno's capture orbit spanned bow shock to planet, providing magnetic field, charged particle, wave phenomena context for passage over poles traverse Jupiter's hazardous inner radiation belts. energetic particle plasma detectors measured electrons precipitating in polar regions, exciting intense aurorae, observed simultaneously by ultraviolet infrared imaging...
Abstract Juno obtained unique low‐altitude space environment measurements over Jupiter's poles on 27 August 2016. Here Jupiter Energetic‐particle Detector Instrument observations are presented for electrons (25–800 keV) and protons (10–1500 keV). We analyze magnetic field‐aligned electron angular beams expected auroral regions that were sometimes symmetric (bidirectional) but more often strongly asymmetric. Included variable surprisingly persistent upward, monodirectional emerging from what...
Abstract Previous Juno mission event studies revealed powerful electron and ion acceleration, to 100s of kiloelectron volts higher, at low altitudes over Jupiter's main aurora polar cap (PC; poleward the aurora). Here we examine 30–1200 keV JEDI‐instrument particle data from first 16 orbits determine how common, persistent, repeatable, ordered these processes are. For PC regions, find (1) upward angle beams, sometimes extending megaelectron volt energies, are persistently present in...
Abstract The MAJIS (Moons And Jupiter Imaging Spectrometer) instrument on board the ESA JUICE (JUpiter ICy moon Explorer) mission is an imaging spectrometer operating in visible and near-infrared spectral range from 0.50 to 5.55 μm two channels with a boundary at 2.3 samplings for VISNIR IR better than 4 nm/band 7 nm/band, respectively. IFOV 150 μrad over total of 400 pixels. As already amply demonstrated by past present operative planetary space missions, this type can span wide scientific...
Moons drive structure in Jupiter's aurorae Like Earth, Jupiter has generated by energetic particles hitting its atmosphere. Those incoming can come from moons Io and Ganymede. Mura et al. used infrared observations the Juno spacecraft to image moon-generated aurorae. The pattern induced showed an alternating series of spots, reminiscent vortices, sometimes split into two arcs. Aurorae related Ganymede could also show a double structure. Although cause these unexpected features remains...
Abstract A large set of observations Jupiter's ultraviolet aurora was collected with the Hubble Space Telescope concurrently NASA‐Juno mission, during an eight‐month period, from 30 November 2016 to 18 July 2017. These cover Juno orbits 3 7 which in situ and remote sensing instruments, as well other observatories, obtained a wealth unprecedented information on magnetosphere connection its auroral ionosphere. is known vary rapidly, timescales ranging seconds one Jovian rotation. The main...
Abstract Two new Juno‐observed particle features of Jupiter's main aurora demonstrate substantial diversity processes generating mysterious auroral emissions. It was previously speculated that sometimes‐observed potential‐driven (up to 400 kV) can turn into broadband stochastic acceleration (dominating at Jupiter) by means instability. Here direct evidence for such a process is revealed with “mono‐energetic” electron inverted‐V rising in energy 200 keV, transforming region downward fluxes...
Abstract On 27 August 2016, the NASA Juno spacecraft performed its first close‐up observations of Jupiter during perijove. Here we present UV images and color ratio maps from Juno‐UVS imaging spectrograph acquired at that time. Data were four sequences (three in north, one south) 5:00 UT to 13:00 UT. From these observations, produced complete Jovian aurorae, including nightside. The sequence shows development intense outer emission outside main oval, a localized region (255°–295° System III...
Abstract Jupiter’s atmosphere is one of the most turbulent places in solar system. Whereas observations lightning and thunderstorms point to moist convection as a small-scale energy source for large-scale vortices zonal jets, this has never been demonstrated due coarse resolution pre-Juno measurements. The Juno spacecraft discovered that Jovian high latitudes host cluster large cyclones with diameter around 5,000 km, each associated intermediate- (roughly between 500 1,600 km) smaller-scale...
Abstract It has been thought that Io’s many paterae may contain lava lakes, but observations by NASA’s Galileo spacecraft at sufficiently high resolution were limited to a few locations, such as Loki Patera. Data acquired Juno mission in May 2023 reveal common set of thermal characteristics for least ten on Io, with bright (hot) “thermal rings” around the perimeter their floors. Loki, Surt, Fuchi, Amaterasu, Mulungu, Chors, and Dazhbog Patera, four unnamed paterae, all show same pattern...
Between November 1999 and April 2000, two major field experiments, the Stratospheric Aerosol Gas Experiment (SAGE) III Ozone Loss Validation (SOLVE) Third European on (THESEO 2000), collaborated to form largest campaign yet mounted study Arctic ozone loss. This international involved more than 500 scientists from over 20 countries. These made measurements across high middle latitudes of Northern Hemisphere. The main scientific aims SOLVE/THESEO 2000 were (1) processes leading loss in vortex...
A climatology of polar stratospheric clouds (PSCs) based on lidar measurements performed at McMurdo Station, Antarctica (78°S, 167°E) from 1993 to 2001 is presented here. The observations are discussed in terms occurrence and temporal spatial variability PSC types. climatological analysis reveals that PSCs mainly occur between July mid‐August. During this time their altitude changes 22 14 km, following the temperature minimum trend. At beginning accounted period (1993–1994), volcanic...