noaa-icecore-17844 GRIP Ice Core 133KYr Mineralogy of Atmospheric Micro-Particles Maggi, V. GRIP Ice Core 133KYr Mineralogy of Atmospheric Micro-Particles 1997-11-30 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17844 Investigator V. Maggi 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 mineralogy geoscientificInformation 133574 cal yr BP 14861 cal yr BP Complete 72.58 72.58 -37.63 -37.63 Continent North America Greenland GRIP>LATITUDE 72.58>LONGITUDE -37.63 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII V. Maggi 1997 Journal of Geophysical Research: Oceans 102 C12 26725-26734 10.1029/97JC00613 http://onlinelibrary.wiley.com/enhanced/doi/10.1029/97JC00613/

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral2.txt Data File; GRIP Mineralogy of Atmospheric Micro-Particles - Selected Ages GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/chem/mineral1.txt Data File; GRIP Mineralogy of Atmospheric Micro-Particles - Detailed USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11