GISP2 Insoluble Microparticles, 3600 YearsEntry ID: NOAA_NCDC_PALEO_GISP2_MICROP
Abstract: Insoluble microparticle concentrations and grain-size distributions are
measured with an Elzone 280PC particle counter in a Class 100 clean room at the
University of New Hampshire. The Elzone uses a 30 um orifice to measure
microparticle concentrations in 64 logarithimically- divided channels from 0.65
um to 11 um and calculates a grain-size distribution as an equivalent spherical
diameter. Mass ... values were calculated assuming an average density of 2.65
g/cm3. Mean grain size is based on the number of particles. We have also used
mean grain size based on mass as discussed in Zielinski and Mershon [in press].
Beta values are the slope of the best-fit line of the grain-size distribution
on a logarithmic scale by channel measured with lower beta values reflecting an
overall coarser grain-size distribution and a higher beta value reflecting an
overall finer grain-size distribution. Because some channels can have zero
counts in them, the beta value may not be a reliable proxy of the overall
coarseness/fineness of a sample. We do not use it in our interpretation of the
insoluble microparticle record, but it is provided here because it has been
used in the past by other ice core investigators.
Data Set Citation
Dataset Originator/Creator: Zielinski, G.A., and G.R. Mershon
Dataset Title: GISP2 Insoluble Microparticles
Dataset Series Name: Greenland Summit Ice Cores CD-ROM
Dataset Release Date: 1997
Dataset Release Place: Boulder, CO
Dataset Publisher: WDC/Paleoclimatology
Other Citation Details: National Snow and Ice Data Center, University of Colorado at BoulderOnline Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gis...
Paleo Temporal Coverage
Paleo Start Date: 3600 ybp
Paleo Stop Date: 0 ybp
Data Set Progress
Distribution Media: online www, ftp
Distribution Format: ascii
Email: gzielinski at maine.edu
Climate Change Institute 318 Bryand Global Sciences Center University of Maine
Province or State: ME
Postal Code: 04469-5790
Climate Change Research Center Institute for the Study of Earth, Oceans and Space and Department of Earth Science University of New Hampshire
Province or State: NH
Postal Code: 03824
Zielinski, G.A., and G.R. Mershon. 1997. Paleoenvironmental implications of the insoluble microparticle record in the GISP2 (Greenland) ice core during the rapidly changing climate of the Pleistocene-Holocene transition. Geological Society of America Bulletin 109:547-559.
Holdsworth, G., P. Chylek, P.A. Damiano, B. Deck, K. Higuchi, B. Johnson,
P.A. Mayewski, M. Wahlen, and G.A. Zielinski. 1996. Historical biomass
burning: Late 19th centruy agriculture revolution in northern hemisphere
ice core data and its atmospheric interpretation. Journal of Geophysical
Chylek, P., B. Johnson, P.A. Damiano, K.C. Taylor, and P. Clement. 1995.
Biomass burning record and black carbon in the GISP2 ice core. Geophysical
Research Letters 22:89-92.
Creation and Review Dates
DIF Creation Date: 2005-05-23
Last DIF Revision Date: 2005-05-23