Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012

Teruo Aoki, Sumito Matoba, Satoru Yamaguchi, Tomonori Tanikawa, Masashi Niwano, Katsuyuki Kuchiki, Kouji Adachi, Jun Uetake, Hideaki Motoyama, Masahiro Hori

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Light-absorbing snow impurities of elemental carbon (EC), organic carbon (OC), and mineral dust have been measured at three locations at elevations from 1,469 to 1,992 m on August 1, 2011, and at the site SIGMA-A (78oN, 68oW, elevation 1,490 m) on the northwest Greenland ice sheet (GrIS) during the period from June 28 to July 12, 2012. At SIGMA-A, a remarkable snow surface lowering together with snow melting was observed during the observation period in 2012, when a record surface melting event occurred over the GrIS. The concentrations in the surface were 0.9, 3.8, and 107 ppbw for EC, OC, and dust, respectively, at the beginning of the period, which increased to 4.9, 17.2, and 1327 ppbw for EC, OC, and dust, respectively, at the end. The EC and dust concentrations were remarkably higher than those at the three locations in 2011 and the recent measurements at Summit. However, our measurements for EC and OC could be underestimated because a recent study indicates that the collection efficiency of a quartz fiber filter, which we employed, is low. We confirm that the snow surface impurity concentrations were enhanced in the observation period, which can be explained by the effects of sublimation/evaporation and snow melt amplification associated with drastic melting. Scanning electron microscopy analysis of surface snow impurities on July 12 revealed that the major component of snow impurities is mineral dust with size larger than 5 μm, which suggests possible emission source areas are peripheral bare soil regions of Greenland and/or the Canadian Arctic.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalBulletin of Glaciological Research
Volume32
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

ice sheet
snow
dust
organic carbon
carbon
melting
sublimation
mineral
bare soil
amplification
evaporation
scanning electron microscopy
melt
quartz
filter

Keywords

  • Black carbon
  • Dust
  • Greenland
  • Snow impurities
  • Sublimation

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Aoki, T., Matoba, S., Yamaguchi, S., Tanikawa, T., Niwano, M., Kuchiki, K., ... Hori, M. (2014). Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012. Bulletin of Glaciological Research, 32(1), 21-31. https://doi.org/10.5331/bgr.32.21

Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012. / Aoki, Teruo; Matoba, Sumito; Yamaguchi, Satoru; Tanikawa, Tomonori; Niwano, Masashi; Kuchiki, Katsuyuki; Adachi, Kouji; Uetake, Jun; Motoyama, Hideaki; Hori, Masahiro.

In: Bulletin of Glaciological Research, Vol. 32, No. 1, 2014, p. 21-31.

Research output: Contribution to journalArticle

Aoki, T, Matoba, S, Yamaguchi, S, Tanikawa, T, Niwano, M, Kuchiki, K, Adachi, K, Uetake, J, Motoyama, H & Hori, M 2014, 'Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012', Bulletin of Glaciological Research, vol. 32, no. 1, pp. 21-31. https://doi.org/10.5331/bgr.32.21
Aoki, Teruo ; Matoba, Sumito ; Yamaguchi, Satoru ; Tanikawa, Tomonori ; Niwano, Masashi ; Kuchiki, Katsuyuki ; Adachi, Kouji ; Uetake, Jun ; Motoyama, Hideaki ; Hori, Masahiro. / Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012. In: Bulletin of Glaciological Research. 2014 ; Vol. 32, No. 1. pp. 21-31.
@article{250e72237848484ba25c38f67c3a4f3a,
title = "Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012",
abstract = "Light-absorbing snow impurities of elemental carbon (EC), organic carbon (OC), and mineral dust have been measured at three locations at elevations from 1,469 to 1,992 m on August 1, 2011, and at the site SIGMA-A (78oN, 68oW, elevation 1,490 m) on the northwest Greenland ice sheet (GrIS) during the period from June 28 to July 12, 2012. At SIGMA-A, a remarkable snow surface lowering together with snow melting was observed during the observation period in 2012, when a record surface melting event occurred over the GrIS. The concentrations in the surface were 0.9, 3.8, and 107 ppbw for EC, OC, and dust, respectively, at the beginning of the period, which increased to 4.9, 17.2, and 1327 ppbw for EC, OC, and dust, respectively, at the end. The EC and dust concentrations were remarkably higher than those at the three locations in 2011 and the recent measurements at Summit. However, our measurements for EC and OC could be underestimated because a recent study indicates that the collection efficiency of a quartz fiber filter, which we employed, is low. We confirm that the snow surface impurity concentrations were enhanced in the observation period, which can be explained by the effects of sublimation/evaporation and snow melt amplification associated with drastic melting. Scanning electron microscopy analysis of surface snow impurities on July 12 revealed that the major component of snow impurities is mineral dust with size larger than 5 μm, which suggests possible emission source areas are peripheral bare soil regions of Greenland and/or the Canadian Arctic.",
keywords = "Black carbon, Dust, Greenland, Snow impurities, Sublimation",
author = "Teruo Aoki and Sumito Matoba and Satoru Yamaguchi and Tomonori Tanikawa and Masashi Niwano and Katsuyuki Kuchiki and Kouji Adachi and Jun Uetake and Hideaki Motoyama and Masahiro Hori",
year = "2014",
doi = "10.5331/bgr.32.21",
language = "English",
volume = "32",
pages = "21--31",
journal = "Bulletin of Glaciological Research",
issn = "1345-3807",
publisher = "Japanese Society of Snow and Ice",
number = "1",

}

TY - JOUR

T1 - Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012

AU - Aoki, Teruo

AU - Matoba, Sumito

AU - Yamaguchi, Satoru

AU - Tanikawa, Tomonori

AU - Niwano, Masashi

AU - Kuchiki, Katsuyuki

AU - Adachi, Kouji

AU - Uetake, Jun

AU - Motoyama, Hideaki

AU - Hori, Masahiro

PY - 2014

Y1 - 2014

N2 - Light-absorbing snow impurities of elemental carbon (EC), organic carbon (OC), and mineral dust have been measured at three locations at elevations from 1,469 to 1,992 m on August 1, 2011, and at the site SIGMA-A (78oN, 68oW, elevation 1,490 m) on the northwest Greenland ice sheet (GrIS) during the period from June 28 to July 12, 2012. At SIGMA-A, a remarkable snow surface lowering together with snow melting was observed during the observation period in 2012, when a record surface melting event occurred over the GrIS. The concentrations in the surface were 0.9, 3.8, and 107 ppbw for EC, OC, and dust, respectively, at the beginning of the period, which increased to 4.9, 17.2, and 1327 ppbw for EC, OC, and dust, respectively, at the end. The EC and dust concentrations were remarkably higher than those at the three locations in 2011 and the recent measurements at Summit. However, our measurements for EC and OC could be underestimated because a recent study indicates that the collection efficiency of a quartz fiber filter, which we employed, is low. We confirm that the snow surface impurity concentrations were enhanced in the observation period, which can be explained by the effects of sublimation/evaporation and snow melt amplification associated with drastic melting. Scanning electron microscopy analysis of surface snow impurities on July 12 revealed that the major component of snow impurities is mineral dust with size larger than 5 μm, which suggests possible emission source areas are peripheral bare soil regions of Greenland and/or the Canadian Arctic.

AB - Light-absorbing snow impurities of elemental carbon (EC), organic carbon (OC), and mineral dust have been measured at three locations at elevations from 1,469 to 1,992 m on August 1, 2011, and at the site SIGMA-A (78oN, 68oW, elevation 1,490 m) on the northwest Greenland ice sheet (GrIS) during the period from June 28 to July 12, 2012. At SIGMA-A, a remarkable snow surface lowering together with snow melting was observed during the observation period in 2012, when a record surface melting event occurred over the GrIS. The concentrations in the surface were 0.9, 3.8, and 107 ppbw for EC, OC, and dust, respectively, at the beginning of the period, which increased to 4.9, 17.2, and 1327 ppbw for EC, OC, and dust, respectively, at the end. The EC and dust concentrations were remarkably higher than those at the three locations in 2011 and the recent measurements at Summit. However, our measurements for EC and OC could be underestimated because a recent study indicates that the collection efficiency of a quartz fiber filter, which we employed, is low. We confirm that the snow surface impurity concentrations were enhanced in the observation period, which can be explained by the effects of sublimation/evaporation and snow melt amplification associated with drastic melting. Scanning electron microscopy analysis of surface snow impurities on July 12 revealed that the major component of snow impurities is mineral dust with size larger than 5 μm, which suggests possible emission source areas are peripheral bare soil regions of Greenland and/or the Canadian Arctic.

KW - Black carbon

KW - Dust

KW - Greenland

KW - Snow impurities

KW - Sublimation

UR - http://www.scopus.com/inward/record.url?scp=84906078352&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906078352&partnerID=8YFLogxK

U2 - 10.5331/bgr.32.21

DO - 10.5331/bgr.32.21

M3 - Article

AN - SCOPUS:84906078352

VL - 32

SP - 21

EP - 31

JO - Bulletin of Glaciological Research

JF - Bulletin of Glaciological Research

SN - 1345-3807

IS - 1

ER -