@article{fdi:010037947,
  title = {{D}iscriminating volcano deformation due to magma movements and variable surface loads: application to {K}atla subglacial volcano, {I}celand},
  author = {{P}inel, {V}irginie and {S}igmundsson, {F}. and {S}turkell, {E}. and {G}eirsson, {H}. and {E}inarsson, {P}. and {G}udmundsson, {M}. {T}. and {H}ognadottir, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}urface displacements induced by ice load variation through time are calculated by spatial integration of {G}reen's function for both end-members: an elastic half-space and a thick elastic plate lying over an inviscid mantle. {T}he elastic half-space model allows the consideration of displacements caused by short-term (seasonal) variations. {T}he thick plate model describes the final relaxed state. {T}he transition between these two stages is dominated by an effective relaxation time which depends on mantle viscosity. {T}his behaviour is considered to estimate displacements induced by long-term load changes (ice retreat over decades). {W}e apply these methods to the {M}yrdalsjokull ice cap, {I}celand, where an annual cycle in ice load occurs as well as a gradual ice retreat as a consequence of climate warming. {S}easonal vertical displacements measured from 2000 to 2006 at two continuous {GPS} stations located near the edge of {M}yrdalsjokull ice cap fit well to a model of an elastic response to the annual variation in ice load. {A} comparison of model displacements and observations provides a minimum value of 29 +/- 5 {GP}a for the effective static local value of the {Y}oung's modulus. {W}e infer long-term displacements induced by ice retreat over the last 115 yr using a combination of the instantaneous elastic response and the final relaxed state. {R}esults are compared to {GPS} measurements used to monitor the {K}atla volcano lying beneath the {M}yrdalsjokull ice cap. {A} forward model considering an elastic thickness of 5 km can explain a fraction of the uplift recorded from 1999 to 2004, but it cannot account for the observed horizontal velocities. {T}he study confirms that magma inflow is required to explain observed inflation of the {K}atla volcano 1999-2004.},
  keywords = {crustal deformation ; {GPS} ; {G}reen' s function ; retreating ice cap ; seasonal effects on volcanoes},
  booktitle = {},
  journal = {{G}eophysical {J}ournal {I}nternational},
  volume = {169},
  numero = {1},
  pages = {325--338},
  ISSN = {0956-540{X}},
  year = {2007},
  DOI = {10.1111/j.1365-246{X}.2006.03267.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037947},
}