Results 21 to 30 of about 302,803 (284)

The radial velocity variations in IC 418 [PDF]

open access: yesInternational Astronomical Union Colloquium, 1981
The present observations are part of a search for spectral and radial velocity variations among central stars of planetary nebulae (Méndez 1980). The spectrograms were taken with the image-tube spectrographs of the 1-m and 4-m telescopes at the Cerro Tololo Inter-American Observatory (CTIO). The emulsion was always IIIa-J baked in “forming gas” (N2+H2).
Roberto H. Mendez, Alberto D. Verga
openaire   +1 more source

Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland

open access: yesGIScience & Remote Sensing, 2023
Glacier velocity is a critical factor closely related to ice dynamics of the Greenland ice sheet (GrIS). We present variations of ice velocity using space-based synthetic aperture radar (SAR) observations from July 2013 to September 2020.
Seong-Woo Jung, Sang-Hoon Hong
doaj   +1 more source

Tidal influence on Rutford Ice Stream, West Antarctica: observations of surface flow and basal processes from closely-spaced GPS and passive seismic stations [PDF]

open access: yes, 2008
High-resolution surface velocity measurements and passive seismic observations from Rutford Ice Stream, West Antarctica, 40 km upstream from the grounding line are presented.
A.E. Behar   +11 more
core   +2 more sources

Discovery of the Fastest Ice Flow along the Central Flow Line of Austre Lovénbreen, a Poly-thermal Valley Glacier in Svalbard

open access: yesRemote Sensing, 2019
Ice flow velocity is a sensitive indicator of glacier variations both controlling and representing the delivery of ice and affecting the future stability of ice masses in a warming climate.
Songtao Ai   +5 more
doaj   +1 more source

Englacial Pore Water Localizes Shear in Temperate Ice Stream Margins [PDF]

open access: yes, 2019
The margins of fast‐moving ice streams are characterized by steep velocity gradients. Some of these gradients cannot be explained by a temperature‐dependent viscosity alone.
Haseloff, Marianne   +2 more
core   +2 more sources

Dynamics of Dalk Glacier in East Antarctica Derived from Multisource Satellite Observations Since 2000

open access: yesRemote Sensing, 2020
Monitoring variability in outlet glaciers can improve the understanding of feedbacks associated with calving, ocean thermal forcing, and climate change.
Yiming Chen   +6 more
doaj   +1 more source

'Calving laws', 'sliding laws' and the stability of tidewater glaciers [PDF]

open access: yes, 2007
A new calving criterion is introduced, which predicts calving where the depth of surface crevasses equals ice height above sea level. Crevasse depth is calculated from strain rates, and terminus position and calving rate are therefore functions of ice ...
Brown   +5 more
core   +1 more source

Numerical Investigation of the Pressure Drop Characteristics of Isothermal Ice Slurry Flow under Variable Ice Particle Diameter

open access: yesJournal of Chemistry, 2020
Ice slurry is an advanced secondary refrigerant that has been attracting considerable attention for the past decade due to the growing concerns regarding energy shortage and environmental protection. To stimulate the potential applications of ice slurry,
Shehnaz Akhtar   +4 more
doaj   +1 more source

Seasonal dynamics of Totten Ice Shelf controlled by sea ice buttressing [PDF]

open access: yesThe Cryosphere, 2018
Previous studies of Totten Ice Shelf have employed surface velocity measurements to estimate its mass balance and understand its sensitivities to interannual changes in climate forcing.
C. A. Greene   +5 more
doaj   +1 more source

Cloud chambers and crystal growth: Effects of electrically enhanced diffusion on dendrite formation from neutral molecules [PDF]

open access: yes, 1999
We present an extension of the solvability theory for free dendrite growth that includes the effects of electrically enhanced diffusion of neutral polar molecules.
Libbrecht, Kenneth G.   +1 more
core   +1 more source

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