DOI: 10.1016/j.atmosenv.2014.10.050
Scopus记录号: 2-s2.0-84918538452
论文题名: Analysis and interpretation of 18 years of mercury observations since 1996 at Mace Head, Ireland
作者: Weigelt A ; , Ebinghaus R ; , Manning A ; J ; , Derwent R ; G ; , Simmonds P ; G ; , Spain T ; G ; , Jennings S ; G ; , Slemr F
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 100 起始页码: 85
结束页码: 93
语种: 英语
英文关键词: Atmospheric mercury
; Long term measurements
; Mace Head
; Seasonality
; Trend
; Trend change
Scopus关键词: Atmospheric movements
; Meteorology
; Tropics
; Atmospheric mercury
; Long-term measurements
; Mace Head
; Seasonality
; Trend
; Trend change
; Mercury (metal)
; mercury
; surface water
; air mass
; atmospheric chemistry
; concentration (composition)
; EOS
; mercury (element)
; observational method
; quantitative analysis
; seasonality
; trend analysis
; air
; Article
; atmospheric dispersion
; Ireland
; latitude
; meteorological phenomena
; prediction
; seasonal variation
; Connacht
; County Galway
; Ireland
; Mace Head
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Observations of atmospheric mercury at the Mace Head Atmospheric Research Station on the Atlantic coast of Ireland made from February 1996 to December 2013 are analyzed. Using meteorological analysis and a sophisticated Lagrangian dispersion model, the hourly averaged mercury concentrations were attributed to four different air mass types: baseline, local, European polluted, and sub-tropical maritime. Monthly median Hg concentrations of all types decreased over the analyzed period but the trend for sub-tropical maritime air masses was with-0.016±0.002ngm-3yr-1 in absolute terms significantly smaller than the trends for all other classes which varied between-0.021 and-0.023ngm-3yr-1. The seasonal variation for sub-tropical maritime air masses is also shallower than for all other classes. This is most likely due to shallower seasonal variation of oxidant concentrations at lower latitudes. The north-south gradient of the trend is qualitatively consistent with the GEOS-Chem model predictions based on decrease of mercury concentrations in surface waters of the North Atlantic but the trends are smaller than predicted. Tests for temporal change of the trends indicate that the decreasing trends of mercury concentrations are leveling off for all air masses with possible exception of the sub-tropical maritime air mass. Quantitative assessment of the trend changes, however, will require a longer time series of the mercury measurements at Mace Head. © 2014 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82092
Appears in Collections: 气候变化事实与影响
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作者单位: Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Geesthacht, Germany; Met Office, Exeter, Devon, United Kingdom; Rdscientific, Newbury, Berkshire, United Kingdom; University of Bristol, School of Chemistry, Bristol, United Kingdom; National University of Ireland Galway, School of Physics, Galway, Ireland; Max-Planck-Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, Germany
Recommended Citation:
Weigelt A,, Ebinghaus R,, Manning A,et al. Analysis and interpretation of 18 years of mercury observations since 1996 at Mace Head, Ireland[J]. Atmospheric Environment,2015-01-01,100