DOI: 10.1002/jgrd.50213
论文题名: Springtime boundary layer O<inf>3</inf> and GEM depletion at Toolik Lake, Alaska
作者: Van Dam B. ; Helmig D. ; Burkhart J.F. ; Obrist D. ; Oltmans S.J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3382
结束页码: 3391
语种: 英语
英文关键词: Arctic Springtime
; Mercury
; Surface Ozone
Scopus关键词: Biochemistry
; Mercury (metal)
; Ordinary differential equations
; Ozone
; Arctic ocean
; Arctic Springtime
; Gaseous elemental mercury
; Lagrangian particle dispersion model
; Measurements of
; Mercuries (Hg)
; Surface ozone
; Toolik lake
; Meteorology
; air mass
; airflow
; atmospheric pollution
; boundary layer
; coastal zone
; mercury (element)
; ozone
; pollutant transport
; spatiotemporal analysis
; Alaska
; Arctic Ocean
; Barrow
; Toolik Lake
; United States
英文摘要: Atmospheric surface ozone (O3 ) was measured at Toolik Lake, Alaska, from September 2010 to August 2011, along with winter and springtime (January-May) measurements of gaseous elemental mercury (GEM). Concurrent episodic springtime depletion of both O3 and GEM was observed between April and May 2011. To investigate these depletion events, surface O 3 measurements from Toolik Lake were compared with similar measurements from Barrow, the only Alaskan site available to use as an indicator of conditions at the Arctic Ocean coastline. Barrow is located approximately 400 km to the northwest of Toolik Lake. In all cases where O3 and GEM depletion was observed at Toolik Lake, similar O3 depletion events (ODEs) were observed at Barrow. Conversely, in over half of the instances where ODEs were observed at Barrow, no such events were recorded at Toolik Lake. The Lagrangian particle dispersion model FLEXPART was utilized to interpret the transport conditions and potential influence of oceanic air masses on depletion events observed at Toolik Lake. These analyses indicate that ODEs observed at Toolik Lake are correlated with depletion events observed at Barrow when the prevailing airflow is from the north and the air mass has spent substantial time over the Arctic Ocean or coast within the previous week. These observations suggest that coastal O3 and GEM-depleted air masses are likely transported from the Arctic Ocean up to ~200 km inland and to at least an altitude of 700 m above sea level. These observations underscore that O 3 and GEM depletion events impact not just the Arctic coastal zone but also extensive inland areas with possible implications for the cycling and bioavailability of mercury (Hg) to inland Arctic ecosystems. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63797
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institute of Arctic and Alpine Research, University of Colorado, Boulder CO, United States; Norwegian Institute for Air Research (NILU), Kjeller, Norway; Sierra Nevada Research Institute, University of California, Merced, CA, United States; Desert Research Institute, Division of Atmospheric Sciences, Reno NV, United States; NOAA Earth System Research Laboratory, Global Monitoring Division, Boulder CO, United States; CIRES, University of Colorado, Boulder CO, United States
Recommended Citation:
Van Dam B.,Helmig D.,Burkhart J.F.,et al. Springtime boundary layer O<inf>3</inf> and GEM depletion at Toolik Lake, Alaska[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)