Decadal variations of atmospheric 7 Be and 10 Be concentrations between 1998 and 2014 in Japan
作者: Takeyasu YamagataHisao NagaiHiroyuki MatsuzakiYukinori Narasaki
作者单位: 1College of Humanities and Sciences, Nihon University, Tokyo 156-8550, Japan
2The University Museum, The University of Tokyo, Tokyo 113-0032, Japan
3Fukuoka Institute of Health and Environmental Sciences, Fukuoka 818-0135, Japan
刊名: Nuclear Inst. and Methods in Physics Research, B, 2019, Vol.455 , pp.265-270
来源数据库: Elsevier Journal
DOI: 10.1016/j.nimb.2018.12.029
关键词: 7 Be10 BeAtmosphereStratosphere-troposphere exchangeAerosols
英文摘要: Abstract(#br)Atmospheric concentrations of 7 Be and 10 Be were investigated in Dazaifu, Fukuoka (1998–2001) and Tokyo (2002–2014) from 1998 to 2014. The seasonal variations were roughly the same for each year, with high 7 Be and 10 Be concentrations and high 10 Be/ 7 Be isotopic ratios caused by strong stratosphere-troposphere exchange (STE) from February to June, and fluctuating 7 Be and 10 Be concentrations and constant 10 Be/ 7 Be ratios caused by vertical convection in the troposphere from July to December. Using a three-box model, the residence time of the stratosphere, the troposphere, and the boundary layer were estimated to be 2 years, 55 days, and 3 days, respectively, and the mass flux observed during the STE season was estimated to be six times higher than the mass flux...
全文获取路径: Elsevier  (合作)

  • atmospheric 大气的
  • troposphere 对零
  • concentrations 浓聚物
  • exchange 交换
  • Japan 日本
  • between 在中间