Evaluation of present and past deposition flux of particulate elemental carbon by use of membrane filters installed in deposition gauges

2014 Fiscal Year Final Research Report

• Project/Area Number: 24510028
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: KANEYASU Naoki 独立行政法人産業技術総合研究所, 環境管理技術研究部門, 上級主任研究員 (00356809)
• Co-Investigator(Kenkyū-buntansha): NOGUCHI Izumi 地方独立行政法人北海道立総合研究機構, 環境保全部・地球・大気環境グループ, 研究主幹 (10442617) ; AKIYAMA Masayuki 地方独立行政法人北海道立総合研究機構, 環境保全部・化学物質グループ, 研究主幹 (30442619) ; YAMAGUCHI Takashi 地方独立行政法人北海道立総合研究機構, 環境保全部・地球・大気環境グループ, 研究主任 (90462316) ; MATSUMOTO Kiyoshi 山梨大学, 総合研究部, 准教授 (60373049)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 元素状炭素粒子 / 環境変動 / 環境分析 / 大気エアロゾル / 長距離輸送 / 地表面沈着

Outline of Final Research Achievements

The deposition of black carbon or elemental carbon (EC) on the snow or ice surface will result in the increase of the positive radiative forcing. In this study, we have conducted the retrieval of decadal record on the deposition of refractory carbon at Rishiri Island (remote site) and Sapporo (urban site). At these sites, deposition gauges have been operated for more than 18 years and membrane filters placed at the bottom of the funnel have been sorted.
We re-suspend the deposited water-insoluble components on the membrane filters into the aqueous phase by dissolving the filters by an organic solvent and re-filtered them through quartz fiber filters for the analysis TOT-EC. The annual deposition flux of EC in Sapporo and Rishiri showed a large increase in 2000 and 2001, which presumably reflected the effect of large forest fire events in Siberia. The influence of pollutants emitted during the rapid economic growth in Chia is not clearly identified in the deposition record.

Free Research Field

環境動態解析