DOI: 10.1016/j.atmosenv.2017.08.058
Scopus记录号: 2-s2.0-85029366560
论文题名: Meteorological effects on Hg wet deposition in a forested site in the Adirondack region of New York during 2000–2015
作者: Mao H ; , Ye Z ; , Driscoll C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 168 起始页码: 90
结束页码: 100
语种: 英语
英文关键词: Climate
; Huntington Wildlife Forest
; Large scale circulation
; Mercury precipitation concentration
; Mercury wet deposition
; NAO
; US East Coast Trough
Scopus关键词: Animals
; Atmospheric chemistry
; Atmospheric pressure
; Climate change
; Deposition
; Digital storage
; Ecology
; Ecosystems
; Forestry
; Meteorological problems
; Precipitation (meteorology)
; Climate
; East coast
; Huntington Wildlife Forest
; Large-scale circulation
; Wet deposition
; Mercury (metal)
; mercury
; atmospheric circulation
; climate change
; concentration (composition)
; flux measurement
; forest ecosystem
; mercury (element)
; North Atlantic Oscillation
; precipitation (climatology)
; wet deposition
; Article
; atmospheric deposition
; climate change
; concentration (parameters)
; forest
; meteorological phenomena
; New York
; North Atlantic oscillation
; particulate matter
; precipitation
; priority journal
; simulation
; spring
; summer
; wet deposition
; wildlife
; Adirondack Mountains
; Atlantic Coast [North America]
; Atlantic Coast [United States]
; Huntington Wildlife Forest
; New York [United States]
; United States
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: An analysis of weekly measurement data of mercury (Hg) wet deposition was conducted for Huntington Wildlife Forest (HWF), a forest ecosystem in Upstate New York and a biological Hg hotspot, during 2000–2015. Annual accumulated Hg wet deposition flux was found to decrease at a rate of −0.13 μg m−2 yr−1 (2% yr−1) (p = 0.09), and volume weighted mean (VWM) Hg precipitation concentrations at −0.14 ng L−1 yr−1 (2.5% yr−1) (p = 0.00). In examining data by season, no trends were identified for the two variables. It was found that the North Atlantic Oscillation (NAO) affected Hg wet deposition predominantly in spring, as did the position of the U.S. East Coast trough in summer, which suggests different dominant mechanisms driving Hg wet deposition in different seasons. The impacts of such large scale circulation processes were facilitated via variations in precipitation amounts. This was manifested in spring 2011 with the strongest positive phase of NAO, resulting in the wettest spring with the largest Hg wet deposition flux, and in summer 2007 with the U.S. East Coast trough positioned the farthest out over the Atlantic Ocean, causing the driest summer with the lowest Hg wet deposition flux of the study period. Extreme precipitation amounts in spring could singularly drive the overall long-term trend in Hg wet deposition whereas in summer other factors could just be as important. Similar mechanisms were thought to control the long term variations of Hg wet deposition and precipitation concentrations in all seasons but summer as indicated in their significant correlation in all but summer. Atmospheric concentrations of gaseous oxidized mercury (GOM) and particulate borne mercury (PBM) at HWF over 2009–2015 hardly exhibited correlations with Hg wet deposition or precipitation concentrations. Chemical transport model simulations strongly supported efficient scavenging of oxidized Hg by precipitation resulting in the lowest concentration of GOM in the warm season despite the supposedly largest GOM production. Our findings suggest that over the long run climate change could play an important role in atmospheric deposition of Hg into ecosystems facilitated by precipitation amounts, which is closely linked to variations in large scale circulation. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82614
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry, State University of New York College of Environmental Science and Forestry, Syracuse, NY, United States; Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY, United States
Recommended Citation:
Mao H,, Ye Z,, Driscoll C. Meteorological effects on Hg wet deposition in a forested site in the Adirondack region of New York during 2000–2015[J]. Atmospheric Environment,2017-01-01,168