TY - JOUR
T1 - Ice-core net snow accumulation and seasonal snow chemistry at a temperate-glacier site
T2 - Mount Waddington, southwest British Columbia, Canada
AU - Neff, Peter D.
AU - Steig, Eric J.
AU - Clark, Douglas H.
AU - McConnell, Joseph R.
AU - Pettit, Erin C.
AU - Menounos, Brian
PY - 2012/12
Y1 - 2012/12
N2 - A 141m ice core was recovered from Combatant Col (51.3858 N, 125.2588 W; 3000ma.s.l.), Mount Waddington, Coast Mountains, British Columbia, Canada. Records of black carbon, dust, lead and water stable isotopes demonstrate that unambiguous seasonality is preserved throughout the core, despite summer surface snowmelt and temperate ice. High accumulation rates at the site (>4m ice eq. a-1) limit modification of annual stratigraphy by percolation of surface meltwater. The ice-core record spans the period 1973-2010. An annually averaged time series of lead concentrations from the core correlates well with historical records of lead emission from North America, and with ice-core records of lead from the Greenland ice sheet. The depth-age scale for the ice core provides sufficient constraint on the vertical strain to allow estimation of the age of the ice at bedrock. Total ice thickness at Combatant Col is ∼250 m; an ice core to bedrock would likely contain ice in excess of 200 years in age. Accumulation at Combatant Col is significantly correlated with both regional precipitation and large-scale geopotential height anomalies.
AB - A 141m ice core was recovered from Combatant Col (51.3858 N, 125.2588 W; 3000ma.s.l.), Mount Waddington, Coast Mountains, British Columbia, Canada. Records of black carbon, dust, lead and water stable isotopes demonstrate that unambiguous seasonality is preserved throughout the core, despite summer surface snowmelt and temperate ice. High accumulation rates at the site (>4m ice eq. a-1) limit modification of annual stratigraphy by percolation of surface meltwater. The ice-core record spans the period 1973-2010. An annually averaged time series of lead concentrations from the core correlates well with historical records of lead emission from North America, and with ice-core records of lead from the Greenland ice sheet. The depth-age scale for the ice core provides sufficient constraint on the vertical strain to allow estimation of the age of the ice at bedrock. Total ice thickness at Combatant Col is ∼250 m; an ice core to bedrock would likely contain ice in excess of 200 years in age. Accumulation at Combatant Col is significantly correlated with both regional precipitation and large-scale geopotential height anomalies.
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U2 - 10.3189/2012JoG12J078
DO - 10.3189/2012JoG12J078
M3 - Article
AN - SCOPUS:84874905447
SN - 0022-1430
VL - 58
SP - 1165
EP - 1175
JO - Journal of Glaciology
JF - Journal of Glaciology
IS - 212
ER -