GRIP Ice Core 133KYr Mineralogy of Atmospheric Micro-Particles Maggi, V. Maggi, V. earth science/paleoclimate/ice cores (illite,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (chlorite,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mica group,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mica group,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,mafic minerals) earth science/paleoclimate/ice cores (quartz,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (oxide and hydroxide minerals,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (quartz,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (quartz,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (kaolinite,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (feldspar group,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,aluminum silicates) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,aluminum silicates) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,aluminum silicates) earth science/paleoclimate/ice cores (quartz,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,kaolinite/clay minerals) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,oxide minerals/quartz) earth science/paleoclimate/ice cores (chlorite,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,mafic minerals) earth science/paleoclimate/ice cores (carbonate,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (carbonate,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (silicate mineral,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,total silicates) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,non-silicates) earth science/paleoclimate/ice cores (silicate mineral,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,total silicates) earth science/paleoclimate/ice cores (mica group,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,mafic minerals) earth science/paleoclimate/ice cores (silicate mineral,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,"""other"" silicates") earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,non-silicates) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,clay minerals) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,mafic minerals) earth science/paleoclimate/ice cores (kaolinite,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (illite,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (oxide and hydroxide minerals,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (silicate mineral,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,"""other"" silicates") earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,clay minerals) earth science/paleoclimate/ice cores (mica group,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,kaolinite/clay minerals) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (mineral matter,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,"""other"" minerals") earth science/paleoclimate/ice cores (silicate mineral,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,total silicates) earth science/paleoclimate/ice cores (ice age at sample end,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (silicate mineral,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,total silicates) earth science/paleoclimate/ice cores (mineral index,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,aluminum silicates) earth science/paleoclimate/ice cores (feldspar group,particles,null,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (mineral index,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,oxide minerals/quartz) earth science/paleoclimate/ice cores (mineral matter,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,"""other"" minerals") earth science/paleoclimate/ice cores (ice age at sample start,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (oxide and hydroxide minerals,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (feldspar group,particles,null,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (oxide and hydroxide minerals,particles,one standard deviation,percent,null,ice cores,raw,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice cores (feldspar group,particles,one standard deviation,percent,null,ice cores,averaged,electron probe x-ray microanalysis,N,null) earth science/paleoclimate/ice core (GRIP>LATITUDE 72.58>LONGITUDE -37.63) The mineralogical composition of atmospheric dust particles changes along the Greenland Ice Core Project (GRIP) ice core in phase with other paleoatmospheric records, showing that climatic changes affect the location, the relative extent, and the surface characteristics of the dust source areas. Fifty GRIP ice samples from the Eemian to the last glacial maximum were analyzed using a scanning electron microscope coupled with X ray energy dispersive system microprobe. More than 20 mineral types or groups were identified and their relative abundance was evaluated. A different mineralogical composition was systematically observed in cold and warm time periods. Quartz, illite, chlorite, micas, and feldspars prevail in the mineral assemblage associated with cold stages or phases (marine isotope stage (MIS) 4, MIS 2, cold part of MIS 3 fast variations), while kaolinite and Fe (hydr)oxides dominate in warm episodes (MIS 5e5, warm parts of fast variations). The first dust mineral assemblage is related mainly to the mechanical weathering prevailing in arid and cold mid-high-latitude areas, while the second dust mineral assemblage is related mainly to deep chemical weathering in warm and humid low-latitude areas. K/C and O/Q ratios may be assumed as indicative of the relative importance of low-latitude versus arid and mid-high-latitude source areas. It is worthwhile to mention that the first warmer part of Eemian (5e5) differs in dust mineralogy from the second part (5e4-5e1) and that also the fast variations are accompanied by clear mineralogical changes of the dust microparticles. The changes of the atmospheric dust mineral background are possibly related to changes of the atmosphere dynamics (meridian pressure gradient, polar front shift, storm track changes, etc.) and or to changes in the relative extent of the deflation source areas. STUDY NOTES: This file contains measured abundances of atmospheric micro-particles, segregated by mineralogy, in the GRIP ice core. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Maggi, V. 1997-11-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17844 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral1.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral1.txt English https://www.ncdc.noaa.gov/paleo/study/17844 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral1.txt V. Maggi1997Mineralogy of atmospheric microparticles deposited along the Greenland Ice Core Project ice coreJournal of Geophysical Research: Oceans102C1226725-2673410.1029/97JC00613http://onlinelibrary.wiley.com/enhanced/doi/10.1029/97JC00613/ START YEAR: 133574 cal yr BP * END YEAR: 14861 cal yr BP -37.63 72.58 -37.63 72.58