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The effect of inpurities for surface albedo on snow and ice

Research Project

Project/Area Number 16K12590
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

Konya Keiko  国立研究開発法人海洋研究開発機構, 地球環境部門(北極環境変動総合研究センター), 技術研究員 (70506419)

Co-Investigator(Kenkyū-buntansha) 宮川 拓真  国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 研究員 (30707568)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsブラックカーボン / 氷河 / 積雪 / アラスカ / アルベド / エアロゾル / 北極域 / 北極 / 降雪 / 雪 / 積雪中不純物 / 気候 / 環境変動
Outline of Final Research Achievements

Black carbon (BC) is one of the light-absorbing particles, which reduce the albedo of snow surfaces. Snow samples were taken from the surface of three glaciers in the Alaska Range in mid-April 2017. The BC size distribution and concentration were analyzed with a laser-induced incandescence method. The BC concentration of the snow samples was 1-6 μgL-1 and 0.5-3 μgL-1 at a depth of 0-2 cm (surface) and 2-10 cm (subsurface), respectively. These values are comparable to other Arctic areas and are considered to be the Alaskan background level. The BC concentrations are 0.5% of those of insoluble solid particles (ISPs) measured using an electrical sensing zone method.

Academic Significance and Societal Importance of the Research Achievements

ブラックカーボンは大気中では温暖化促進の効果を示す物質である。積雪上では太陽光を吸収し、融雪を促進する効果があると言われている。温暖化が進行している北極域の氷河上にてブラックカーボンの影響を見積もることは今後の地球環境変動の影響を推測する上で重要である。本研究では春のブラックカーボン濃度および全不純物量の分析を行った。アルベドへの影響は小さいことがわかり、本研究で対象とした2017年4月の値はアラスカ域のバックグラウンドレベルと考えることができ、また全不純物量に比べブラックカーボンの割合が小さいことが分かった。今後、他の年・季節等と比較する必要がある。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018 Other

All Int'l Joint Research (1 results) Presentation (9 results) (of which Int'l Joint Research: 6 results)

  • [Int'l Joint Research] US Geological Survey/University of Alaska, Fairbanks(米国)

    • Related Report
      2019 Annual Research Report
  • [Presentation] Mass concentration and origin of black carbon in spring snow on Alaskan glaciers2020

    • Author(s)
      Keiko Konya, Takuma Miyakawa, Masayuki Takigawa, Masahiro Yamaguchi, Shad O’ Neel, Martin Truffer, David Clemens-Sewall and Ian R. Lee
    • Organizer
      Sixth International Symposium on Arctic Research
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mass concertation and particle number of black carbon on glaciers in the eastern Alaskan Range, Alaska USA2019

    • Author(s)
      Keiko Konya, Takuma Miyakawa, Masayuki Takigawa, Masahiro Yamaguchi, Shad O’ Neel, Martin Truffer, Ian R. Lee and David Clemens-Sewall
    • Organizer
      International Union of Geodesy and Geophysics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アラスカ山脈における氷河上ブラックカーボンの質量濃度と粒子数2019

    • Author(s)
      紺屋 恵子, 宮川 拓真, 滝川 雅之, 山口 将大
    • Organizer
      雪氷研究大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Evaluation of wet deposition process of black carbon using WRF-Chem and WRF-FLEXPART2019

    • Author(s)
      Masayuki Takigawa, Takuma Miyakawa, Masahiro Yamaguchi, Yugo Kanaya
    • Organizer
      3rd PACES (Air Pollution in the Arctic: Climate, Environment and Societies) Open Science Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of wet deposition process of black carbon in WRF/Chem model during MIRAI Arctic research cruise over high-latitude regions in 2016,2019

    • Author(s)
      Masayuki Takigawa, Takuma Miyakawa, Fumikazu Taketani, Masahiro Yamaguchi, Yugo Kanaya
    • Organizer
      2018 joint 14th iCACGP (the international Commission on Atmospheric Chemistry and Global Pollution) Symposium and 15th IGAC (the International Global Atmospheric Chemistry) Science Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 領域化学輸送モデルにおける北極海上でのブラックカーボンの湿性沈着過程の評価2019

    • Author(s)
      滝川雅之・竹谷文一・宮川拓真・山口将大・金谷有剛
    • Organizer
      ブルーアース2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 領域化学輸送モデルにおける北極海上でのブックカーボンの湿性沈着過程の評価2019

    • Author(s)
      滝川雅之, 竹谷文一, 宮川拓真, 山口将大,金谷有剛
    • Organizer
      ブルーアース2019
    • Related Report
      2018 Research-status Report
  • [Presentation] Spatial variability of black carbon on glaciers in the eastern Alaskan Range, Alaska USA2018

    • Author(s)
      Keiko Konya, Takuma Miyakawa, Masayuki Takigawa, Masahiro Yamaguchi, Shad O’Neel, Martin Truffer, David Clemens-Sewall and Ian R. Lee
    • Organizer
      AGU fall meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluation of wet deposition process of black carbon in WRF/Chem model during MIRAI Arctic research cruise over high-latitude regions in 20162018

    • Author(s)
      M. Takigawa, Takuma Miyakawa, F. Taketani, Masahiro Yamaguchi, Y. Kanaya
    • Organizer
      2018 joint 14th iCACGP Symposium and 15th IGAC Science Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2021-02-19  

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