TY  - JOUR
A1  - Krivov, Alexander V.
A1  - Krüger, Harald
A1  - Grün, Eberhard
A1  - Thiessenhusen, Kai-Uwe
A1  - Hamilton, Douglas P.
T1  - A tenuous dust ring of Jupiter formed by escaping ejecta from the Galilean satellites
Y1  - 2002
SN  - 0148-0227
ER  - 
TY  - JOUR
A1  - Schenk, Paul
A1  - Hamilton, Douglas P.
A1  - Johnson, Robert E.
A1  - McKinnon, William B.
A1  - Paranicas, Chris
A1  - Schmidt, Jürgen
A1  - Showalter, Mark R.
T1  - Plasma, plumes and rings saturn system dynamics as recorded in global color patterns on its midsize icy satellites
JF  - Icarus : international journal of solar system studies
N2  - New global maps of the five inner midsize icy saturnian satellites, Mimas, Enceladus, Tethys, Dione, and Rhea, have been constructed in three colors (UV, Green and near-IR) at resolutions of 1 km/pixel. The maps reveal prominent global patterns common to several of these satellites but also three major color features unique to specific satellites or satellite subgroups. The most common features among the group are first-order global asymmetries in color properties. This pattern, expressed on Tethys, Dione and Rhea, takes the form of a similar to 1.4-1.8 times enhancement in redness (expressed as IR/UV ratio) of the surface at the center of the trailing hemisphere of motion, and a similar though significantly weaker IR/UV enhancement at the center of the leading hemisphere. The peak in redness on the trailing hemisphere also corresponds to a known decrease in albedo. These double hemispheric asymmetries are attributable to plasma and E-ring grain bombardment on the trailing and leading hemispheres, respectively, for the outer three satellites Tethys, Dione and Rhea, whereas as E-ring bombardment may be focused on the trailing hemisphere of Mimas due to its orbital location interior to Enceladus. The maps also reveal three major deviations from these basic global patterns. We observe the previously known dark bluish leading hemisphere equatorial band on Tethys but have also discovered a similar band on Mimas. Similar in shape, both features match the surface patterns expected for irradiation of the surface by incident MeV electrons that drift in a direction opposite to the plasma flow. The global asymmetry on Enceladus is offset similar to 40 degrees to the west compared to the other satellites. We do not consider Enceladus in detail here, but the global distribution of bluish material can be shown to match the deposition pattern predicted for plume fallback onto the surface (Kempf, S., Beckmann, U., Schmidt, S. [2010]. Icarus 206, 446-457. doi:10.1016/j.icarus.2009.09.016). E-ring deposition on Enceladus thus appears to mask or prevent the formation of the lenses and hemispheric asymmetries we see on the other satellites. Finally, we observe a chain of discrete bluish splotches along the equator of Rhea. Unlike the equatorial bands of Tethys and Mimas, these splotches form a very narrow great circle <= 10-km wide (north-to-south) and appear to be related to surface disruption, exposing fresh, bluish ice on older crater rims. This feature is unique to Rhea and may have formed by impact onto its surface of orbiting material.
KW  - Satellites, Surfaces
KW  - Saturn, Satellites
KW  - Saturn, Rings
KW  - Enceladus
KW  - Satellites, Composition
KW  - Magnetospheres
Y1  - 2011
U6  - https://doi.org/10.1016/j.icarus.2010.08.016
SN  - 0019-1035
VL  - 211
IS  - 1
SP  - 740
EP  - 757
PB  - Elsevier
CY  - San Diego
ER  - 
TY  - JOUR
A1  - Tucker, Marlee A.
A1  - Boehning-Gaese, Katrin
A1  - Fagan, William F.
A1  - Fryxell, John M.
A1  - Van Moorter, Bram
A1  - Alberts, Susan C.
A1  - Ali, Abdullahi H.
A1  - Allen, Andrew M.
A1  - Attias, Nina
A1  - Avgar, Tal
A1  - Bartlam-Brooks, Hattie
A1  - Bayarbaatar, Buuveibaatar
A1  - Belant, Jerrold L.
A1  - Bertassoni, Alessandra
A1  - Beyer, Dean
A1  - Bidner, Laura
A1  - van Beest, Floris M.
A1  - Blake, Stephen
A1  - Blaum, Niels
A1  - Bracis, Chloe
A1  - Brown, Danielle
A1  - de Bruyn, P. J. Nico
A1  - Cagnacci, Francesca
A1  - Calabrese, Justin M.
A1  - Camilo-Alves, Constanca
A1  - Chamaille-Jammes, Simon
A1  - Chiaradia, Andre
A1  - Davidson, Sarah C.
A1  - Dennis, Todd
A1  - DeStefano, Stephen
A1  - Diefenbach, Duane
A1  - Douglas-Hamilton, Iain
A1  - Fennessy, Julian
A1  - Fichtel, Claudia
A1  - Fiedler, Wolfgang
A1  - Fischer, Christina
A1  - Fischhoff, Ilya
A1  - Fleming, Christen H.
A1  - Ford, Adam T.
A1  - Fritz, Susanne A.
A1  - Gehr, Benedikt
A1  - Goheen, Jacob R.
A1  - Gurarie, Eliezer
A1  - Hebblewhite, Mark
A1  - Heurich, Marco
A1  - Hewison, A. J. Mark
A1  - Hof, Christian
A1  - Hurme, Edward
A1  - Isbell, Lynne A.
A1  - Janssen, Rene
A1  - Jeltsch, Florian
A1  - Kaczensky, Petra
A1  - Kane, Adam
A1  - Kappeler, Peter M.
A1  - Kauffman, Matthew
A1  - Kays, Roland
A1  - Kimuyu, Duncan
A1  - Koch, Flavia
A1  - Kranstauber, Bart
A1  - LaPoint, Scott
A1  - Leimgruber, Peter
A1  - Linnell, John D. C.
A1  - Lopez-Lopez, Pascual
A1  - Markham, A. Catherine
A1  - Mattisson, Jenny
A1  - Medici, Emilia Patricia
A1  - Mellone, Ugo
A1  - Merrill, Evelyn
A1  - Mourao, Guilherme de Miranda
A1  - Morato, Ronaldo G.
A1  - Morellet, Nicolas
A1  - Morrison, Thomas A.
A1  - Diaz-Munoz, Samuel L.
A1  - Mysterud, Atle
A1  - Nandintsetseg, Dejid
A1  - Nathan, Ran
A1  - Niamir, Aidin
A1  - Odden, John
A1  - Oliveira-Santos, Luiz Gustavo R.
A1  - Olson, Kirk A.
A1  - Patterson, Bruce D.
A1  - de Paula, Rogerio Cunha
A1  - Pedrotti, Luca
A1  - Reineking, Bjorn
A1  - Rimmler, Martin
A1  - Rogers, Tracey L.
A1  - Rolandsen, Christer Moe
A1  - Rosenberry, Christopher S.
A1  - Rubenstein, Daniel I.
A1  - Safi, Kamran
A1  - Said, Sonia
A1  - Sapir, Nir
A1  - Sawyer, Hall
A1  - Schmidt, Niels Martin
A1  - Selva, Nuria
A1  - Sergiel, Agnieszka
A1  - Shiilegdamba, Enkhtuvshin
A1  - Silva, Joao Paulo
A1  - Singh, Navinder
A1  - Solberg, Erling J.
A1  - Spiegel, Orr
A1  - Strand, Olav
A1  - Sundaresan, Siva
A1  - Ullmann, Wiebke
A1  - Voigt, Ulrich
A1  - Wall, Jake
A1  - Wattles, David
A1  - Wikelski, Martin
A1  - Wilmers, Christopher C.
A1  - Wilson, John W.
A1  - Wittemyer, George
A1  - Zieba, Filip
A1  - Zwijacz-Kozica, Tomasz
A1  - Mueller, Thomas
T1  - Moving in the Anthropocene
BT  - global reductions in terrestrial mammalian movements
JF  - Science
N2  - Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in areas with a low human footprint. We attribute this reduction to behavioral changes of individual animals and to the exclusion of species with long-range movements from areas with higher human impact. Global loss of vagility alters a key ecological trait of animals that affects not only population persistence but also ecosystem processes such as predator-prey interactions, nutrient cycling, and disease transmission.
Y1  - 2018
U6  - https://doi.org/10.1126/science.aam9712
SN  - 0036-8075
SN  - 1095-9203
VL  - 359
IS  - 6374
SP  - 466
EP  - 469
PB  - American Assoc. for the Advancement of Science
CY  - Washington
ER  -