DOI: 10.1002/jgrd.50777
论文题名: Modeling of temporal patterns and sources of atmospherically transported and deposited pesticides in ecosystems of concern: A case study of toxaphene in the Great Lakes
作者: Li R. ; Jin J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 20 起始页码: 11863
结束页码: 11874
语种: 英语
英文关键词: pesticide background concentration
; pesticide deposition
; pesticide emission
; pesticide model
; pesticide soil residue
; pesticide transport
Scopus关键词: Atmospheric movements
; Deposition
; Ecosystems
; Lake pollution
; Pesticides
; Soil pollution
; Background concentration
; Pesticide deposition
; Pesticide emission
; Pesticide transport
; Soil residues
; Lakes
; atmosphere-hydrosphere interaction
; atmospheric deposition
; background level
; boundary layer
; environmental fate
; insecticide
; pesticide residue
; pollutant source
; pollutant transport
; temporal analysis
; Great Lakes [North America]
; Salmonidae
; Salvelinus namaycush
英文摘要: Pesticides have adverse effects on human health and the environment and can be transported through the atmosphere from application sites and deposited to sensitive ecosystems. This study applies a comprehensive multimedia regional pesticide fate and chemical transport modeling system that we developed to investigate the atmospheric transport and deposition of toxaphene to the Great Lakes. Simulated results predict a significant amount of toxaphene (~350 kg) being transported through the atmosphere and deposited into the Great Lakes in the simulation year. Results also show that U.S. residues and global background are major sources to toxaphene deposition into the Great Lakes and atmospheric concentrations in the region. While the U.S. residues are the dominant source in warm months, the background dominates during winter months. In addition, different sources have different influences on the individual Great Lakes due to their proximity and relative geographical positions to the sources; U.S. residues are the dominant source to Lakes Ontario, Erie, Huron, and Michigan, but they are a much less important source to Lake Superior. These results shed light on the mystery that observed toxaphene concentrations in Great Lakes' lake trout and smelt declined between 1982 and 1992 in four of the Great Lakes except Lake Superior. While monthly total depositions to Lakes Ontario, Erie, Huron, and Michigan have clear seasonal variability with much greater values in April, May, and June, monthly total depositions to Lake Superior are more uniformly distributed over the year with comparatively greater levels in cold months. Key points Quantified contributions of different sources of toxaphene to the Great Lakes Modeled temporal deposition patterns and identified the causes Solved the mystery of observed concentrations in trout and smelt in the five lakes ©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/63220
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: Department of Plants, Soils, and Climate, Utah State University, 4825 Old Main Hill, Logan, UT 84322-4825, United States
Recommended Citation:
Li R.,Jin J.. Modeling of temporal patterns and sources of atmospherically transported and deposited pesticides in ecosystems of concern: A case study of toxaphene in the Great Lakes[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(20)