TY - JOUR
T1 - Sediment plumes as a proxy for local ice-sheet runoff in Kangerlussuaq Fjord, West Greenland
AU - McGRATH, D.
AU - Steffen, K.
AU - Overeem, I.
AU - Mernild, S. H.
AU - Hasholt, B.
AU - van den Broeke, M.R.
PY - 2010
Y1 - 2010
N2 - Meltwater runoff is an important component of the mass balance of the Greenland ice sheet (GrIS) and contributes to eustatic sea-level rise. In situ measurements of river runoff at the ∼325 outlets are nonexistent due to logistical difficulties. We develop a novel methodology using satellite observations of sediment plumes as a proxy for the onset, duration and volume of meltwater runoff from a basin of the GrIS. Sediment plumes integrate numerous poorly constrained processes, including meltwater refreezing and supra- and englacial water storage, and are formed by meltwater that exits the GrIS and enters the ocean. Plume characteristics are measured in Moderate Resolution Imaging Spectroradiometer (MODIS, band 1, 250 m) satellite imagery during the 2001-08 melt seasons. Plume formation and cessation in Kangerlussuaq Fjord, West Greenland, are positively correlated (r2=0.88, n=5, p
AB - Meltwater runoff is an important component of the mass balance of the Greenland ice sheet (GrIS) and contributes to eustatic sea-level rise. In situ measurements of river runoff at the ∼325 outlets are nonexistent due to logistical difficulties. We develop a novel methodology using satellite observations of sediment plumes as a proxy for the onset, duration and volume of meltwater runoff from a basin of the GrIS. Sediment plumes integrate numerous poorly constrained processes, including meltwater refreezing and supra- and englacial water storage, and are formed by meltwater that exits the GrIS and enters the ocean. Plume characteristics are measured in Moderate Resolution Imaging Spectroradiometer (MODIS, band 1, 250 m) satellite imagery during the 2001-08 melt seasons. Plume formation and cessation in Kangerlussuaq Fjord, West Greenland, are positively correlated (r2=0.88, n=5, p
U2 - 10.3189/002214310794457227
DO - 10.3189/002214310794457227
M3 - Article
SN - 0022-1430
VL - 56
SP - 813
EP - 821
JO - Journal of Glaciology
JF - Journal of Glaciology
IS - 199
ER -