TY - JOUR
T1 - Antarctic ice rises and rumples
T2 - Their properties and significance for ice-sheet dynamics and evolution
AU - Matsuoka, Kenichi
AU - Hindmarsh, Richard C A
AU - Moholdt, Geir
AU - Bentley, Michael J.
AU - Pritchard, Hamish D.
AU - Brown, Joel
AU - Conway, Howard
AU - Drews, Reinhard
AU - Durand, Gaël
AU - Goldberg, Daniel
AU - Hattermann, Tore
AU - Kingslake, Jonathan
AU - Lenaerts, Jan T M
AU - Martín, Carlos
AU - Mulvaney, Robert
AU - Nicholls, Keith W.
AU - Pattyn, Frank
AU - Ross, Neil
AU - Scambos, Ted
AU - Whitehouse, Pippa L.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Locally grounded features in ice shelves, called ice rises and rumples, play a key role buttressing discharge from the Antarctic Ice Sheet and regulating its contribution to sea level. Ice rises typically rise several hundreds of meters above the surrounding ice shelf; shelf flow is diverted around them. On the other hand, shelf ice flows across ice rumples, which typically rise only a few tens of meters above the ice shelf. Ice rises contain rich histories of deglaciation and climate that extend back over timescales ranging from a few millennia to beyond the last glacial maximum. Numerical model results have shown that the buttressing effects of ice rises and rumples are significant, but details of processes and how they evolve remain poorly understood. Fundamental information about the conditions and processes that cause transitions between floating ice shelves, ice rises and ice rumples is needed in order to assess their impact on ice-sheet behavior. Targeted high-resolution observational data are needed to evaluate and improve prognostic numerical models and parameterizations of the effects of small-scale pinning points on grounding-zone dynamics.
AB - Locally grounded features in ice shelves, called ice rises and rumples, play a key role buttressing discharge from the Antarctic Ice Sheet and regulating its contribution to sea level. Ice rises typically rise several hundreds of meters above the surrounding ice shelf; shelf flow is diverted around them. On the other hand, shelf ice flows across ice rumples, which typically rise only a few tens of meters above the ice shelf. Ice rises contain rich histories of deglaciation and climate that extend back over timescales ranging from a few millennia to beyond the last glacial maximum. Numerical model results have shown that the buttressing effects of ice rises and rumples are significant, but details of processes and how they evolve remain poorly understood. Fundamental information about the conditions and processes that cause transitions between floating ice shelves, ice rises and ice rumples is needed in order to assess their impact on ice-sheet behavior. Targeted high-resolution observational data are needed to evaluate and improve prognostic numerical models and parameterizations of the effects of small-scale pinning points on grounding-zone dynamics.
KW - Antarctic Ice Sheet
KW - Holocene deglaciation
KW - Ice dome
KW - Pinning point
KW - Sea-level rise
UR - http://www.scopus.com/inward/record.url?scp=84943788125&partnerID=8YFLogxK
U2 - 10.1016/j.earscirev.2015.09.004
DO - 10.1016/j.earscirev.2015.09.004
M3 - Article
AN - SCOPUS:84943788125
SN - 0012-8252
VL - 150
SP - 724
EP - 745
JO - Earth-Science Reviews
JF - Earth-Science Reviews
ER -