Seasonal Variation of Wet Deposition of Black Carbon in Arctic Alaska

DOI Web Site Web Site Web Site Web Site 被引用文献8件 参考文献72件
  • T. Mori
    Department of Physics, Faculty of Science Division I Tokyo University of Science Tokyo Japan
  • Y. Kondo
    National Institute of Polar Research Tachikawa Japan
  • S. Ohata
    Institute for Space–Earth Environmental Research Nagoya University Nagoya Japan
  • Y. Zhao
    Air Quality Research Center University of California Davis CA USA
  • P. R. Sinha
    Department of Earth and Space Sciences Indian Institute of Space Science and Technology Thiruvananthapuram India
  • N. Oshima
    Meteorological Research Institute Tsukuba Japan
  • H. Matsui
    Graduate School of Environmental Studies Nagoya University Nagoya Japan
  • N. Moteki
    Department of Earth and Planetary Science, Graduate School of Science The University of Tokyo Tokyo Japan
  • M. Koike
    Department of Earth and Planetary Science, Graduate School of Science The University of Tokyo Tokyo Japan

書誌事項

公開日
2020-08-18
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2019jd032240
公開者
American Geophysical Union (AGU)

この論文をさがす

説明

<jats:title>Abstract</jats:title><jats:p>Black carbon (BC) aerosol deposited in and onto Arctic snow increases the snow's absorption of sunlight and accelerates snowmelt. Wet removal of BC from the atmosphere plays a key role in determining its abundance in the Arctic atmosphere and in Arctic snow. However, this process is poorly understood, mainly due to the scarcity of relevant measurements. To study wet deposition of BC, we made measurements of mass concentration of BC in snow and rain (<jats:italic>C</jats:italic><jats:sub>MBC</jats:sub>) and of BC in air (<jats:italic>M</jats:italic><jats:sub>BC</jats:sub>) with high accuracy (16% and 10%, respectively) at the Barrow Atmospheric Baseline Observatory, Alaska, from July 2013 to August 2017 and analyzed them along with routinely measured meteorological parameters from Barrow. Monthly mean <jats:italic>M</jats:italic><jats:sub>BC</jats:sub> near the surface and <jats:italic>C</jats:italic><jats:sub>MBC</jats:sub> were poorly correlated from midwinter to early spring, when <jats:italic>C</jats:italic><jats:sub>MBC</jats:sub> was close to the annual median while <jats:italic>M</jats:italic><jats:sub>BC</jats:sub> was at its annual peak. Seasonal variations in the altitude distribution of <jats:italic>M</jats:italic><jats:sub>BC</jats:sub> may lead to these differences in seasonal variation of <jats:italic>M</jats:italic><jats:sub>BC</jats:sub> near the surface and <jats:italic>C</jats:italic><jats:sub>MBC</jats:sub>. About 50% of the annual wet deposition of BC occurred in the 3 months of summer, associated with high values of total precipitation and BC originating from biomass burning. Size distributions of BC in snow and rain were stable throughout the year, suggesting that the size distribution of BC in the lower troposphere was similarly stable. Calculations by two global models reproduced the observed seasonal variations of <jats:italic>C</jats:italic><jats:sub>MBC</jats:sub> and showed that BC from biomass burning dominated <jats:italic>C</jats:italic><jats:sub>MBC</jats:sub> in summer.</jats:p>

収録刊行物

被引用文献 (8)*注記

もっと見る

参考文献 (72)*注記

もっと見る

関連プロジェクト

もっと見る

問題の指摘

ページトップへ