%0 Journal Article %J GSA Today %D 2019 %T The Larsen Ice Shelf System, Antarctica (LARISSA): Polar Systems Bound Together, Changing Fast %A Wellner, Julia %A Scambos, Ted %A Domack, Eugene %A Vernet, Maria %A Leventer, Amy %A Balco, Greg %A Brachfeld, Stefanie %A Cape, Mattias %A Huber, Bruce %A Ishman, Scott %A McCormick, Michael %A Mosley-Thompson, Ellen %A Pettit, Erin %A Smith, Craig %A Truffer, Martin %A Van Dover, Cindy %A Yoo, Kyu-Cheul %X Climatic, cryospheric, and biologic changes taking place in the northern Antarctic Peninsula provide examples for how ongoing systemic change may pro‐ gress through the entire Antarctic system. A large, interdisciplinary research project focused on the Larsen Ice Shelf system, synthesized here, has documented dramatic ice cover, oceanographic, and ecosystem changes in the Antarctic Peninsula during the Holocene and the present period of rapid regional warming. The responsive- ness of the region results from its position in the climate and ocean system, in which a narrow continental block extends across zonal atmospheric and ocean flow, creating high snow accumulation, strong gradients and gyres, dynamic oceanography, outlet glaciers feeding into many fjords and bays having steep topography, and a continental shelf that contains many glacially carved troughs separated by areas of glacial sedi- ment accumulation. The microcosm of the northern Antarctic Peninsula has a ten- dency to change rapidly—rapid relative not just to Antarctica's mainland but compared to the rest of the planet as well—and it is generally warmer than the rest of Antarctica. Both its Holocene and modern glaciological retreats offer a picture of how larger areas of Antarctica farther south might change under future warming. %B GSA Today %V 29 %P 4–10 %G eng %R 10.1130/gsatg382a.1 %0 Journal Article %J Remote Sensing of Environment %D 2015 %T Rapid large-area mapping of ice flow using Landsat 8 %A Fahnestock, Mark %A Scambos, Ted %A Moon, Twila %A Gardner, Alex %A Haran, Terry %A Klinger, Marin %K Antarctica %K glaciers %K Greenland %K Ice flow %K Landsat %K Remote sensing %X We report on the maturation of optical satellite-image-based ice velocity mapping over the ice sheets and large glacierized areas, enabled by the high radiometric resolution and internal geometric accuracy of Landsat 8's Operational Land Imager (OLI). Detailed large-area single-season mosaics and time-series maps of ice flow were created using data spanning June 2013 to June 2015. The 12-bit radiometric quantization and 15-m pixel scale resolution of OLI band 8 enable displacement tracking of subtle snow-drift patterns on ice sheet surfaces at $\sim$. 1. m precision. Ice sheet and snowfield snow-drift features persist for typically 16 to 64. days, and up to 432. days, depending primarily on snow accumulation rates. This results in spatially continuous mapping of ice flow, extending the mapping capability beyond crevassed areas. Our method uses image chip cross-correlation and sub-pixel peak-fitting in matching Landsat path/row pairs. High-pass filtering is applied to the imagery to enhance local surface texture. The current high image acquisition rates of Landsat 8 (725 scenes per day globally) reduces the impact of high cloudiness in polar and mountain terrain and allows rapid compilation of large areas, or dense temporal coverage of seasonal ice flow variations. The results rival the coverage and accuracy of interferometric Synthetic Aperture Radar (InSAR) mapping. %B Remote Sensing of Environment %I The Authors %G eng %U http://dx.doi.org/10.1016/j.rse.2015.11.023 %R 10.1016/j.rse.2015.11.023 %0 Journal Article %J Bulletin of the American Meteorological Society %D 2013 %T Challenges to Understanding the Dynamic Response of Greenland's Marine Terminating Glaciers to Oceanic and Atmospheric Forcing %A Straneo, Fiammetta %A Heimbach, Patrick %A Sergienko, Olga %A Hamilton, Gordon %A Catania, Ginny %A Griffies, Stephen %A Hallberg, Robert %A Jenkins, Adrian %A Joughin, Ian %A Motyka, Roman %A Pfeffer, W. Tad %A Stephen F. Price %A Eric Rignot %A Scambos, Ted %A Martin Truffer %A Vieli, Andreas %B Bulletin of the American Meteorological Society %V 94 %P 1131 - 1144 %8 2013/08/01 %G eng %U http://dx.doi.org/10.1175/BAMS-D-12-00100.1 %N 8 %R 10.1175/BAMS-D-12-00100.1