Results 181 to 190 of about 9,746 (287)

A Panspermia Origin for Venus Cloud Life

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Decades of study have hinted at the astrobiological potential of Venus's cloud layers. This potential is often cast as stemming from the idea that the Venusian surface was clement in the past. As the climate changed, life then remained in, or perhaps evolved and migrated to, the last habitable niche: the altitudes above ∼50 km with Earth‐like ...
E. Guinan, T. J. Austin, J. G. O’Rourke, N. G. Izenberg, E. A. Silber, E. Trembath‐Reichert   +5 more
wiley   +1 more source

Characterization of the Outer Uranian Rings in the Visual and Near‐IR Using Keck, JWST, and HST Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract We present observations of the Uranian outer ring system at near‐infrared and visible wavelengths. Observations with the Keck Telescope were taken in July‐August 2007 at 2.12 and 1.63 μm, when the ring plane was almost edge‐on (ring opening angle B=0.62 $B=0.62$–0.24° ${}^{\circ}$). These data showed, for the first time, the μ ring at infrared
Imke de Pater, Mark R. Showalter, Matt M. Hedman, Heidi B. Hammel, Mike Roman, Leigh N. Fletcher, Maryame El Moutamid, Damya Souami   +7 more
wiley   +1 more source

The lunar dust environment: concerns for Moon-based astronomy. [PDF]

Philos Trans A Math Phys Eng Sci
Horányi M, Szalay JR, Wang X.
europepmc   +1 more source

Modeling Upper Ocean Ecosystem Dynamics in Response to Interannual Sea‐Ice Variability in the Western Antarctic Peninsula

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 4, April 2026.
Abstract In the Western Antarctic Peninsula (WAP), marine plankton dynamics are tightly linked to the interannual variability in environmental conditions, including phenological shifts in sea‐ice seasonality. To explore these linkages, we use a 1‐dimensional vertical ocean‐ice‐ecosystem model (KPP‐Eco‐Ice, or KEI) that simulates physical and ecosystem ...
Catherine R. Czajka, Jessica S. Turner, Sharon Stammerjohn, Heather H. Kim, Oscar Schofield, Benjamin T. Saenz, Scott C. Doney   +6 more
wiley   +1 more source

Seasonal and Geologic Controls on Submarine Groundwater Discharge‐Derived Nutrient Fluxes to Two Coastal Embayments

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 4, April 2026.
Abstract Submarine groundwater discharge and porewater exchange are critical but often overlooked sources of nutrients to coastal systems. This study investigates how sediment permeability and summer‐winter seasonal dynamics influence the magnitude and biogeochemistry of nutrient fluxes from submarine groundwater discharge and porewater exchange ...
Moira Taylor, Joseph J. Tamborski, Aaron Alorda‐Kleinglass, Nathaniel Maynard   +3 more
wiley   +1 more source

Pollution resistance of Saturn's ring particles during micrometeoroid impact. [PDF]

Nat Geosci
Hyodo R, Genda H, Madeira G.
europepmc   +1 more source

From Extension to Strike‐Slip Faulting Along the Western Continuation of the North Anatolian Fault in the Northern Aegean Sea: Structural, Geochronological and Geochemical Constraints

Tectonics, Volume 45, Issue 4, April 2026.
Abstract The Northern Aegean region preserves a complex deformation pattern shaped by Miocene extension driven by retreat of the Hellenic subduction system, later overprinted by Plio–Pleistocene transtension linked to the westward propagation of the North Anatolian Fault (NAF). Although numerous structural, geophysical and geochronological studies have
L. R. Berio, E. L. Dantas, A. Kylander‐Clark, R. L. Muniz, M. Pizzati, F. Storti, G. Viola, F. Balsamo   +7 more
wiley   +1 more source

DEX in near Earth orbit in light of Venus Orbiter Dust Experiment. [PDF]

Sci Rep
Pabari J, Nambiar S, Singh R, Jitarwal S, Bhardwaj A, Praneeth SMK, Shah B, Suthar P, Pandya S, Rami J, Kumar D, Singh VK, Khandekar R, Singh RK, Sahu A, Adalja H, Patel A.   +16 more
europepmc   +1 more source

Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA. [PDF]

Nat Commun, 2020
Terada K, Morota T, Kato M.
europepmc   +1 more source

A Multi Tracer Approach Reveals Groundwater Residence Times and Dynamic Endmember Mixing in the Subterranean Estuary of a High Energy Beach

Water Resources Research, Volume 62, Issue 4, April 2026.
Abstract Subterranean estuaries (STEs) under high‐energy conditions function as effective biogeochemical reactors, where waterbodies of varying physico‐chemical properties mix. Chemical reactions within the STE modulate the solute composition of groundwater discharging to the sea providing for example nutrients for plankton growth to coastal ecosystems.
Rena Meyer, Anja Reckhardt, Janek Greskowiak, Stephan L. Seibert, Nico Skibbe, Jürgen Sültenfuß, Gudrun Massmann   +6 more
wiley   +1 more source