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Penny Ice Cap, Baffin Island, Canada
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Penny Ice Cap ice core and snowpit microparticle data.
This dataset contains a summary of microparticle measurements from
snowpits and a 334-m long ice core (P95) from the Penny Ice Cap,
Baffin Island, Canada. Snowpits were excavated in 1994-1995,
and core P95 was drilled in April-May 1995.
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The P95 core was dated back to 7900 yr ago (319 m) by spectral analysis of the
electrical conductivity record which tracks seasonal chemical variations
(Fisher et al. 1998; Grumet et al., 1998. Additional time control was provided by
conductivity and sulfate peaks related major volcanic eruptions.
Beyond 7900 yr ago, the depth-age curve was adjusted to match the end of the
Younger Dryas-Holocene transition (326 m) dated at 11,550 +/- 70 yr ago in
Greenland ice-core records. Age values for the P95 microparticle record are
expressed in years before A.D. 2000 (yb2k).
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Microparticle concentrations and size distributions were measured
for a size range of 0.85 to 12 micrometer with an Elzone 280PC multi-channel
particle counter equipped with a 30 micrometer orifice (Zdanowicz et al., 1998).
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The microparticle parameters are:
N = total number of particles [0.85-12 micrometers], expressed in thousands of
particles per mililiter of meltwater (10^3 ml^-1)
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M = total mass of particles [0.85-12 micrometers], expressed in micrograms per
kilogram of ice (micrograms kg^-1 or ppb)
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NMD = arithmetic mean diameter of microparticles [0.85-12 micrometer], in micrometers
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b (beta) = slope of a Junge distribution applied to microparticles with diameter < 1 micrometer
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ORIGINAL REFERENCES:
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Zdanowicz, C.M., Zielinski, G.A. and Wake, C.P (1998). Characteristics of
modern atmospheric dust deposition in snow on the Penny ice cap, Baffin Island,
Arctic Canada. Tellus 50B, 506-520.
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Grumet, N.S., Wake, C.P., Zielinski, G.A., Fisher, D.A. and Jacobs, J.D. (1998).
Preservation of glaciochemical time-series in snow and ice records from the percolation
zone of the Penny Ice Cap, Baffin Island. Geophysical Research Letters 25, 357-360.
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Zdanowicz, C.M., Zielinski, G.A., Wake, C.P., Fisher, D.A. and Koerner, R.M. (2000).
A Holocene record of atmospheric dust deposition from the Penny ice cap,
Baffin Island, Canada. Quaternary Research, v53, No. 1, pp 62 -69, January 2000.
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