SwePub
Sök i LIBRIS databas

  Extended search

onr:"swepub:oai:DiVA.org:su-123340"
 

Search: onr:"swepub:oai:DiVA.org:su-123340" > Chemical compositio...

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist
  • Oyabu, IkumiStockholms universitet,Institutionen för naturgeografi,Hokkaido University, Japan (author)

Chemical compositions of solid particles present in the Greenland NEEM ice core over the last 110,000 years

  • Article/chapterEnglish2015

Publisher, publication year, extent ...

  • 2015
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-123340
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-123340URI
  • https://doi.org/10.1002/2015JD023290DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • This study reports the chemical composition of particles present along Greenland's North Greenland Eemian Ice Drilling (NEEM) ice core, back to 110,000years before present. Insoluble and soluble particles larger than 0.45 mu m were extracted from the ice core by ice sublimation, and their chemical composition was analyzed using scanning electron microscope and energy dispersive X-ray spectroscopy and micro-Raman spectroscopy. We show that the dominant insoluble components are silicates, whereas NaCl, Na2SO4, CaSO4, and CaCO3 represent major soluble salts. For the first time, particles of CaMg(CO3)(2) and Ca(NO3)(2)center dot 4H(2)O are identified in a Greenland ice core. The chemical speciation of salts varies with past climatic conditions. Whereas the fraction of Na salts (NaCl+Na2SO4) exceeds that of Ca salts (CaSO4+CaCO3) during the Holocene (0.6-11.7kyr B.P.), the two fractions are similar during the BOlling-AllerOd period (12.9-14.6kyr B.P.). During cold climate such as over the Younger Dryas (12.0-12.6kyr B.P.) and the Last Glacial Maximum (15.0-26.9kyr B.P.), the fraction of Ca salts exceeds that of Na salts, showing that the most abundant ion generally controls the salt budget in each period. High-resolution analyses reveal changing particle compositions: those in Holocene ice show seasonal changes, and those in LGM ice show a difference between cloudy bands and clear layers, which again can be largely explained by the availability of ionic components in the atmospheric aerosol body of air masses reaching Greenland.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Iizuka, Yoshinori (author)
  • Fischer, Hubertus (author)
  • Schuepbach, Simon (author)
  • Gfeller, Gideon (author)
  • Svensson, Anders (author)
  • Fukui, Manabu (author)
  • Steffensen, Jörgen Peder (author)
  • Hansson, MargaretaStockholms universitet,Institutionen för naturgeografi(Swepub:su)hansso (author)
  • Stockholms universitetInstitutionen för naturgeografi (creator_code:org_t)

Related titles

  • In:Journal of Geophysical Research - Atmospheres120:18, s. 9789-98132169-897X2169-8996

Internet link

Find in a library

To the university's database

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view