Zobrazeno 1 - 10
of 25
pro vyhledávání: '"ANNA RUTH W. HALBERSTADT"'
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-16 (2024)
Abstract Pliocene global temperatures periodically exceeded modern levels, offering insights into ice sheet sensitivity to warm climates. Ice-proximal geologic records from this period provide crucial but limited glimpses of Antarctic Ice Sheet behav
Externí odkaz:
https://doaj.org/article/b1dbbcfb8d6a42e79420ba7a0571ad1c
Supervised classification of slush and ponded water on Antarctic ice shelves using Landsat 8 imagery
Autor:
Rebecca L. Dell, Alison F. Banwell, Ian C. Willis, Neil S. Arnold, Anna Ruth W. Halberstadt, Thomas R. Chudley, Hamish D. Pritchard
Publikováno v:
Journal of Glaciology, Vol 68, Pp 401-414 (2022)
Surface meltwater is becoming increasingly widespread on Antarctic ice shelves. It is stored within surface ponds and streams, or within firn pore spaces, which may saturate to form slush. Slush can reduce firn air content, increasing an ice-shelf's
Externí odkaz:
https://doaj.org/article/ca21aee3c148465f9e5c0e8f79fa1d35
Characteristics of the deforming bed: till properties on the deglaciated Antarctic continental shelf
Autor:
ANNA RUTH W. HALBERSTADT, LAUREN M. SIMKINS, JOHN B. ANDERSON, LINDSAY O. PROTHRO, PHILIP J. BART
Publikováno v:
Journal of Glaciology, Vol 64, Pp 1014-1027 (2018)
Contemporary ice stream flow is directly linked to conditions at the ice/bed interface, yet this environment is logistically difficult to access. Instead, we investigate subglacial processes important for ice stream flow by studying tills on the degl
Externí odkaz:
https://doaj.org/article/299ea2abb75a455b8eceaa944c0a32df
Autor:
Sarah L. Greenwood, Lauren M. Simkins, Anna Ruth W. Halberstadt, Lindsay O. Prothro, John B. Anderson
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-12 (2018)
Ice sheets are vulnerable to changes in the environment where ice discharges into the ocean. Here, the authors show that, in spite of widespread retreat following the last glacial maximum, a sub-sector of the East Antarctic Ice Sheet in the Ross Sea
Externí odkaz:
https://doaj.org/article/c3b4133e9c9c4c2495f408d757060cfe
Autor:
Anna Ruth W. Halberstadt, Colin J. Gleason, Mahsa S. Moussavi, Allen Pope, Luke D. Trusel, Robert M. DeConto
Publikováno v:
Remote Sensing, Vol 12, Iss 8, p 1327 (2020)
Surface meltwater generated on ice shelves fringing the Antarctic Ice Sheet can drive ice-shelf collapse, leading to ice sheet mass loss and contributing to global sea level rise. A quantitative assessment of supraglacial lake evolution is required t
Externí odkaz:
https://doaj.org/article/d8eea9be65594387867a8ec88dc60f76
Autor:
Mahsa Moussavi, Allen Pope, Anna Ruth W. Halberstadt, Luke D. Trusel, Leanne Cioffi, Waleed Abdalati
Publikováno v:
Remote Sensing, Vol 12, Iss 1, p 134 (2020)
Melt and supraglacial lakes are precursors to ice shelf collapse and subsequent accelerated ice sheet mass loss. We used data from the Landsat 8 and Sentinel-2 satellites to develop a threshold-based method for detection of lakes found on the Antarct
Externí odkaz:
https://doaj.org/article/3a5bf4507b1c4068b2751ce718231ac8
Publikováno v:
The Cryosphere. 17:1623-1643
We apply geologic evidence from ice-free areas in Antarctica to evaluate model simulations of ice sheet response to warm climates. This is important because such simulations are used to predict ice sheet behaviour in future warm climates, but geologi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c50c870f613339fb30562e2581a2cfc
https://doi.org/10.5194/tc-17-1623-2023
https://doi.org/10.5194/tc-17-1623-2023
Publikováno v:
Geology. 50:557-561
In the Ross Sea sector of Antarctica, periodic large-scale marine ice-sheet fluctuations since the mid-Miocene are recorded by drill core and seismic data, revealing a dynamic ice-sheet response to past increases in temperature and atmospheric CO2. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e9f3a89fd78b79518c6a047774fe637
https://doi.org/10.1130/g49664.1
https://doi.org/10.1130/g49664.1
Autor:
Anna Ruth W. Halberstadt
Additional details on the numerical climate and ice-sheet modeling methods, the impact of prevailing wind patterns on MDVs climate, temperature dependence on regional ice sheet geometry, the compilation of MDVs landforms and sedimentary deposits, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b83ea9adbcaa06123c85aba8be9bf8f
https://doi.org/10.1130/geol.s.18822092.v1
https://doi.org/10.1130/geol.s.18822092.v1
Autor:
A. R. Lewis, H. Chorley, Ross D. Powell, Fabio Florindo, Francesca Sangiorgi, Richard H. Levy, Christian Ohneiser, Trevor Williams, Laura De Santis, Molly O. Patterson, Tina van de Flierdt, Warren W. Dickinson, Nicholas R. Golledge, Carlota Escutia, Lara F. Pérez, Anna Ruth W. Halberstadt, David M. Harwood, Tim R Naish, Robert M. McKay, Edward Gasson, Aisling M. Dolan, Georgia R. Grant, Amelia E. Shevenell, Stephen R. Meyers, D. E. Kowalewski, Marjolaine Verret
Publikováno v:
Antarctic Climate Evolution ISBN: 9780128191095
The Miocene to Pliocene (Neogene) occurred between 23.04 and 2.58 million years ago and includes intervals of peak global warmth where Earth’s average surface temperature was up to 8℃ warmer than present. Major cooling steps also occurred, across
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca164b651c752f654245fc60315ca844
https://doi.org/10.1016/b978-0-12-819109-5.00014-1
https://doi.org/10.1016/b978-0-12-819109-5.00014-1