Accelerated Ice Discharge from the Antarctic Peninsula following the Collapse of Larsen B Ice Shelf

Rignot, Eric; Casassa, Gino; Gogineni, Prasad; Krabill, W. B.; Rivera, Andrés; Thomas, Robert H.

doi:10.1002/9781118782033.ch15

Cited by 121 publications

(150 citation statements)

References 24 publications

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“…1a). The striking flow acceleration of the glaciers that lost buttressing, similar to the acceleration of the glaciers feeding the Larsen A Ice Shelf after its collapse in 1995, left no doubt about the importance of coupling between ice shelves and their tributaries, and the role of ice shelves in regulating the volume of ice that these glaciers discharge into the ocean (Rott et al, 2002;De Angelis and Skvarca, 2003;Rack and Rott, 2004;Rignot et al, 2004;Scambos et al, 2004). Several subsequent studies unsurprisingly focused on the fast changing tributary glaciers in the Larsen A and northern and central Larsen B embayments (e.g., Hulbe et al, 2008;Shuman et al, 2011;Rott et al, 2011;Berthier et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The evolving instability of the remnant Larsen B Ice Shelf and its tributary glaciers

Khazendar

Borstad

Scheuchl

et al. 2015

Earth and Planetary Science Letters

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We hypothesize that the different evolutions of the three glaciers are related to their dissimilar bed topographies and degrees of grounding. We apply numerical modeling and data assimilation that show these changes to be accompanied by a reduction in the buttressing afforded by the remnant ice shelf, a weakening of the shear zones between its flow units and an increase in its fracture. The fast flowing northwestern part of the remnant ice shelf exhibits increasing fragmentation, while the stagnant southeastern part seems to be prone to the formation of large rifts, some of which we show have delimited successive calving events. A large rift only 12 km downstream from the grounding line is currently traversing the stagnant part of the ice shelf, defining the likely front of the next large calving event. We propose that the flow acceleration, ice front retreat and enhanced fracture of the remnant Larsen B Ice Shelf presage its approaching demise.

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Section: Introductionmentioning

confidence: 99%

The evolving instability of the remnant Larsen B Ice Shelf and its tributary glaciers

Khazendar

Borstad

Scheuchl

et al. 2015

Earth and Planetary Science Letters

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“…If this rise continues for more years to come, it would have an adverse effect on the thickness of Amery ice shelf [13].…”

Section: Resultsmentioning

confidence: 99%

“…Studies show that the thinning of ice shelves and drainage of glacier in Antarctica, could be the result of warming ocean temperature rather than warming air temperature [13]. Thus, SST over the Southern Ocean is a sensitive parameter by which the climate change signals are expected to be recognised [14,15].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Southern Ocean Surface Temperature Variability Using Long-Term Optimum Interpolation SST Data

et al. 2013

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An attempt is made to understand the long-term variability of SST using NOAA optimum interpolation SST data for the period (1982–2011) in the Southern Ocean. This dataset has been used (i) to study the interannual variability in SST anomaly and (ii) to carry out regression analysis to compute linear trend in the annual averaged Southern Ocean SST. It is observed that summer season exhibits more variability than winter. Moreover, El Nino/La Nina events apparently play a critical role in the variability of Southern Ocean SST. Thus, higher SST anomalies were observed in El Nino years (e.g., 1983), while cooler anomalies were seen during La Nina years (e.g., 1985). In addition, the eastern and western sides of Antarctica experience episodes of warm and cold SST. Western parts of the Southern Ocean experienced higher anomalies during 1992, 1993, and 1994, while the eastern part experienced positive anomalies in 1997, 1998, 2002, and 2003. The paper also highlights the different regions of the Southern Ocean showing statistically significant positive/negative trends in the variability of interannual average SST. However, in general, the Southern Ocean as a whole is showing a weak interannual cooling trend in SST.

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“…En años recientes, con el colapso y desintegración de las plataformas de hielo de Príncipe Gustavo y Larsen A en 1995, y gran parte de Wordie en 1992 y Larsen B en 2002 (Glasser et al 2011;Vaughan & Doake, 1996;Rignot et al 2004), las miradas también se han centrado en las consecuencias que estos colapsos han provocado en la dinámica de los glaciares adyacentes. Además, con la mejora de los instrumentos de medición y sensores remotos, las mediciones han revelado que la desintegración de las plataformas lleva al adelgazamiento y aceleración de los glaciares tributarios (De Angelis & Skvarca, 2003;Scambos et al 2004;Rignot et al 2005;Pritchard & Vaughan, 2007).…”

Section: Introductionunclassified

Una revisión de las variaciones recientes de las plataformas de hielo y su efecto en los glaciares tributarios en el sector norte de la Península Antártica (63°S - 70°S)

Izagirre

2015

Anales Instituto Patagonia (Chile)

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In the context of the average increase in the surface temperature of the planet (which was 0.6±0.2 °C in the 20th century), and the rapid warming of the North of the Antarctic Peninsula (which in the past 50 years has increased about 2.5 °C), emphasis is placed on the direct dependence of the stability of the tributary glaciers depends directly on the collapse of ice shelves, which have suffered a drastic break-up in recent years. In addition, known data of changes in the dynamics of the tributary glaciers is compared with recent variations of the platforms, along with discussing the primary mechanisms that affect in the collapse of platforms and the subsequent acceleration and thinning of adjacent glaciers.

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Accelerated Ice Discharge from the Antarctic Peninsula following the Collapse of Larsen B Ice Shelf

Cited by 121 publications

References 24 publications

The evolving instability of the remnant Larsen B Ice Shelf and its tributary glaciers

The evolving instability of the remnant Larsen B Ice Shelf and its tributary glaciers

An Investigation of the Southern Ocean Surface Temperature Variability Using Long-Term Optimum Interpolation SST Data

Una revisión de las variaciones recientes de las plataformas de hielo y su efecto en los glaciares tributarios en el sector norte de la Península Antártica (63°S - 70°S)

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