Zobrazeno 1 - 10
of 3 454
pro vyhledávání: '"J. Woodward"'
Autor:
G. Balco, N. Brown, K. Nichols, R. A. Venturelli, J. Adams, S. Braddock, S. Campbell, B. Goehring, J. S. Johnson, D. H. Rood, K. Wilcken, B. Hall, J. Woodward
Publikováno v:
The Cryosphere, Vol 17, Pp 1787-1801 (2023)
Cosmogenic-nuclide concentrations in subglacial bedrock cores show that the West Antarctic Ice Sheet (WAIS) at a site between Thwaites and Pope glaciers was at least 35 m thinner than present in the past several thousand years and then subsequently t
Externí odkaz:
https://doaj.org/article/c5fab67e62fb49edaee227aa6a73d0f5
Autor:
J. R. Adams, J. S. Johnson, S. J. Roberts, P. J. Mason, K. A. Nichols, R. A. Venturelli, K. Wilcken, G. Balco, B. Goehring, B. Hall, J. Woodward, D. H. Rood
Publikováno v:
The Cryosphere, Vol 16, Pp 4887-4905 (2022)
Evidence for the timing and pace of past grounding line retreat of the Thwaites Glacier system in the Amundsen Sea embayment (ASE) of Antarctica provides constraints for models that are used to predict the future trajectory of the West Antarctic Ice
Externí odkaz:
https://doaj.org/article/18dbbc1b2b2f4e7da967cc30687c5065
Autor:
J. S. Johnson, R. A. Venturelli, G. Balco, C. S. Allen, S. Braddock, S. Campbell, B. M. Goehring, B. L. Hall, P. D. Neff, K. A. Nichols, D. H. Rood, E. R. Thomas, J. Woodward
Publikováno v:
The Cryosphere, Vol 16, Pp 1543-1562 (2022)
Widespread existing geological records from above the modern ice sheet surface and outboard of the current ice margin show that the Antarctic Ice Sheet (AIS) was much more extensive at the Last Glacial Maximum (∼ 20 ka) than at present. However, wh
Externí odkaz:
https://doaj.org/article/d97c5f03a7e14839ab9da581375d590a
Publikováno v:
Earth System Science Data, Vol 12, Pp 3453-3467 (2020)
Recent satellite data have revealed widespread grounding line retreat, glacier thinning, and associated mass loss along the Bellingshausen Sea sector, leading to increased concern for the stability of this region of Antarctica. While satellites have
Externí odkaz:
https://doaj.org/article/8bca7388cb5c4dd2a60b59f68ce7581d
Autor:
S. L. Strother, U. Salzmann, F. Sangiorgi, P. K. Bijl, J. Pross, C. Escutia, A. Salabarnada, M. J. Pound, J. Voss, J. Woodward
Publikováno v:
Biogeosciences, Vol 14, Iss 8, Pp 2089-2100 (2017)
Antarctic palaeoclimate evolution and vegetation history after the formation of a continent-scale cryosphere at the Eocene–Oligocene boundary, 33.9 million years ago, has remained a matter of controversy. In particular, the reconstruction of terres
Externí odkaz:
https://doaj.org/article/89dae3d72fa94a54a510ebe9247e5f70
Publikováno v:
The Cryosphere, Vol 10, Pp 2069-2074 (2016)
The microstructure and density of ice layers in snowpacks is poorly quantified. Here we present a new field method for measuring the density of ice layers caused by melt or rain-on-snow events. The method was used on 87 ice layer samples taken from n
Externí odkaz:
https://doaj.org/article/3318ff058a3341e7be9983484d081554
Autor:
M. J. Westoby, S. A. Dunning, J. Woodward, A. S. Hein, S. M. Marrero, K. Winter, D. E. Sugden
Publikováno v:
Earth Surface Dynamics, Vol 4, Iss 2, Pp 515-529 (2016)
Multi-temporal and fine-resolution topographic data products are increasingly used to quantify surface elevation change in glacial environments. In this study, we employ 3-D digital elevation model (DEM) differencing to quantify the topographic evolu
Externí odkaz:
https://doaj.org/article/1002172f795b4307bcc3958270d4423e
Publikováno v:
The Cryosphere, Vol 7, Iss 6, Pp 1721-1740 (2013)
We use the Shreve hydraulic potential equation as a simplified approach to investigate potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets. We validate the method by demonstrating its abi
Externí odkaz:
https://doaj.org/article/6eb7e2bd80ae43d686633acb978c6a5a
Autor:
Chelsea E. Stamm, Adelle P. McFarland, Melissa N. Locke, Hannah Tabakh, Qing Tang, Maureen K. Thomason, Joshua J. Woodward
Publikováno v:
mBio, Vol 15, Iss 8 (2024)
ABSTRACT Transposon sequencing (Tn-seq) is a powerful genome-wide technique to assess bacterial fitness under varying growth conditions. However, screening via Tn-seq in vivo is challenging. Dose limitations and host restrictions create bottlenecks t
Externí odkaz:
https://doaj.org/article/5f4a2164b72949198af62aa05bd1d31e
Publikováno v:
The Cryosphere, Vol 5, Iss 3, Pp 561-567 (2011)
We present results from new geophysical data allowing modelling of the water flow within Subglacial Lake Ellsworth (SLE), West Antarctica. Our simulations indicate that this lake has a novel temperature distribution due to significantly thinner ice t
Externí odkaz:
https://doaj.org/article/9f69f30c418a45e8a919d8147e113aec