Results 71 to 80 of about 564 (170)

Microwave Emissivity and Accumulation Rate of Polar Firn [PDF]

Journal of Glaciology, 1977
AbstractRadiative transfer theory is formulated to permit a meaningful definition of emissivity for bulk emitting media such as snow. The emissivity in the Rayleigh-Jeans approximation is then the microwave brightness temperature TB divided by an effective physical temperature 〈T〉.
openaire   +1 more source

Observation and Coordination Needs for Current, Near‐Future, and Next Generation Earth‐Observing SAR Systems

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This paper summarizes an evaluation by experts of how coordination of Earth‐observing Synthetic Aperture Radar (SAR) missions among the world's space agencies could advance toward game‐changing scientific discoveries and fully realizing SAR's practical capability to address many issues facing society.
Cathleen E. Jones, Ake Rosenqvist, Björn Rommen, Magdalena Fitrzyk, Eric Rignot, Bernd Scheuchl, Yujie Zheng, Andrew Hooper, Mark Simons, Tomokazu Kobayashi, Paul Siqueira, Maurizio Santoro, Takeo Tadono, Laura Hess, Heather McNairn, Laura Frulla, Malin Johansson, Wolfgang Dierking, Line Rouyet, Annett Bartsch, Paco Lopez Dekker, Johnny A. Johannessen   +21 more
wiley   +1 more source

Aspect Asymmetry in Martian Gullies: A Topographic Signature of Their Formation Process?

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract On Mars, erosional‐depositional landforms named gullies provide natural experiments for studying the topographic signature of the processes that act on hillslope evolution. High‐resolution topographic data were used to quantitatively compare the steepness of opposing walls in gully alcoves incised into ice‐rich slopeside mantling deposits.
A. Noblet, G. R. Osinski, S. J. Conway
wiley   +1 more source

Fabric, Texture, and Bubble Characteristics of the Million‐Year Old Allan Hills Blue Ice Core ALHIC1901

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract Ice cores from the Allan Hills blue ice area in Antarctica have been dated to several million years of age. However, the stratigraphy of these cores is often disturbed, and age reversals are common, hampering the interpretation of the derived climate records.
Nicolas Stoll, Marguerite Shaya, Liam Kirkpatrick, Johannes Freitag, Valens Hishamunda, John‐Morgan Manos, Daniela Jansen, Ilka Weikusat, John Fegyveresi, Bradley Paul Lipovsky, Ed Brook, Sarah Shackleton, John Higgins, T. J. Fudge   +13 more
wiley   +1 more source

Firn Model Intercomparison Experiment (FirnMICE)

Journal of Glaciology, 2017
Evolution of cold dry snow and firn plays important roles in glaciology; however, the physical formulation of a densification law is still an active research topic.
JESSICA M.D. LUNDIN, C. MAX STEVENS, ROBERT ARTHERN, CHRISTO BUIZERT, ANAIS ORSI, STEFAN R.M. LIGTENBERG, SEBASTIAN B. SIMONSEN, EVAN CUMMINGS, RICHARD ESSERY, WILL LEAHY, PAUL HARRIS, MICHIEL M. HELSEN, EDWIN D. WADDINGTON   +12 more
doaj   +1 more source

Airborne Radar Reveals Area‐Wide Decadal Increase of Surface Mass Balance on the Plateau in Dronning Maud Land, East Antarctica

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Projections of Antarctica's sea‐level contribution depend on future changes in surface mass balance (SMB), yet it remains uncertain whether climate change has already impacted SMB on the East Antarctic Plateau, given diverging trends in prior studies.
Alexandra M. Zuhr, Steven Franke, Olaf Eisen, Daniel Steinhage, Veit Helm, Maria Hörhold, Johannes Freitag, Reinhard Drews   +7 more
wiley   +1 more source

On the Rates of Growth of Grains and Crystals in South Polar Firn [PDF]

Journal of Glaciology, 1969
The size of firn crystals as a function of age has been investigated in thin sections to a depth of 49 m at the South Pole. Grain cross-sections increased in size from 0.24 mm2 at 0.1 m depth to 0.63 mm2 at 10 m. Crystals, as distinct from grains, increased in size from 0.18 to 0.43 mm2 over the same interval, implying that grains are generally ...
openaire   +1 more source

Bromine Enrichment Signal in Svalbard Shallow Cores Reflects Changes of Seasonal Sea Ice Variability

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Bromine enrichment Brenr $\left(\mathrm{B}{\mathrm{r}}_{\mathrm{e}\mathrm{n}\mathrm{r}}\right)$ has been widely used as a proxy for past sea ice reconstructions. In this study, three firn cores drilled on Holtedahlfonna (Svalbard) were analyzed for trace elements. Excluding a single year data, a positive correlation was observed between Brenr $
Enrico Biscaro, Federico Scoto, Catherine Larose, Elena Barbaro, Francois Burgay, David Cappelletti, Giuliano Dreossi, Jacopo Gabrieli, Elisabeth Isaksson, Jack Kohler, Barbara Stenni, Clara Turetta, Jean‐Charles Gallet, Andrea Spolaor   +13 more
wiley   +1 more source

Diffusion of stable isotopes in polar firn and ice : the isotope effect in firn diffusion

Diffusion of stable isotopes in polar firn and ice : the isotope effect in firn diffusion
International Symposium on Physics of Ice Core Records. Shikotsukohan, Hokkaido, Japan, September 14-17, 1998.
Johnsen, Sigfús. J., Clausen, Henrik B., Cuffey, Kurt M., Hoffmann, Georg, Schwander, Jakob, Creyts, Timothy, Hondoh, Takeo   +6 more
openaire   +2 more sources

Direct and inverse problem for gas diffusion in polar firn

Communications on Analysis and Computation
41 pages, 18 ...
Moufawad, Sophie, Nassif, Nabil, Triki, Faouzi   +2 more
openaire   +4 more sources