@article{fdi:010066284,
  title = {{R}ifting processes and ice-flow modulation observed on {M}ertz {G}lacier, {E}ast {A}ntarctica},
  author = {{L}escarmontier, {L}. and {L}egresy, {B}. and {Y}oung, {N}. {W}. and {C}oleman, {R}. and {T}estut, {L}. and {M}ayet, {C}. and {L}acroix, {P}ascal},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigated the evolution of two major rifts cutting across {M}ertz {G}lacier {T}ongue, {E}ast {A}ntarctica, using a combination of satellite images and 60 day sets of {GPS} data from two stations deployed either side of the western rift in 2007. {T}he eastern rift began to open in the early 1990s, and the western rift initiated in 2002 in conjunction with the collision of a large iceberg with the tongue. {V}elocity time series derived from the 2007 {GPS} data exhibited strong variations at tidal periods modulated by sea-surface height and sea-surface slope and reproduced here with a conceptually simple model. {W}e found that opening of the western rift in 2002 leads to a dramatic change in behavior of the tongue as the large range in velocity (700-2400 m a(-1)) observed in 2000 was largely reduced (1075-1225 m a(-1)) in 2007. {O}pening of the western rift decoupled the glacier from the transverse loading on the tongue driven by east-west tidal circulation. {T}his loading previously induced time-varying lateral drag, which caused the large velocity range. {O}ur results suggest changes in the mechanical behavior of an ice tongue impact the dynamics of the outlet glacier system and should be considered in longer-term mass-balance evaluations.},
  keywords = {{A}ntarctic glaciology ; calving ; crevasses ; glacier flow ; glacier mechanics ; {ANTARCTIQUE}},
  booktitle = {},
  journal = {{J}ournal of {G}laciology},
  volume = {61},
  numero = {230},
  pages = {1183--1193},
  ISSN = {0022-1430},
  year = {2015},
  DOI = {10.3189/2015{J}o{G}15{J}028},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066284},
}