DOI: 10.1002/2015GB005137
Scopus记录号: 2-s2.0-84945492103
论文题名: Is atmospheric phosphorus pollution altering global alpine Lake stoichiometry?
作者: Brahney J ; , Mahowald N ; , Ward D ; S ; , Ballantyne A ; P ; , Neff J ; C
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 9 起始页码: 1369
结束页码: 1383
语种: 英语
英文关键词: alpine Lakes
; biomass burning
; dust
; eutrophication
; phosphorus
; stoichiometry
Scopus关键词: alpine environment
; anthropogenic effect
; atmospheric pollution
; biomass burning
; concentration (composition)
; dust
; eutrophication
; lacustrine environment
; oligotrophic environment
; phosphorus
; precipitation quality
; primary production
; stoichiometry
; water quality
英文摘要: Anthropogenic activities have significantly altered atmospheric chemistry and changed the global mobility of key macronutrients. Here we show that contemporary global patterns in nitrogen (N) and phosphorus (P) emissions drive large hemispheric variation in precipitation chemistry. These global patterns of nutrient emission and deposition (N:P) are in turn closely reflected in the water chemistry of naturally oligotrophic lakes (r2 = 0.81, p < 0.0001). Observed increases in anthropogenic N deposition play a role in nutrient concentrations (r2 = 0.20, p < 0.05); however, atmospheric deposition of P appears to be major contributor to this pattern (r2 = 0.65, p < 0.0001). Atmospheric simulations indicate a global increase in P deposition by 1.4 times the preindustrial rate largely due to increased dust and biomass burning emissions. Although changes in the mass flux of global P deposition are smaller than for N, the impacts on primary productivity may be greater because, on average, one unit of increased P deposition has 16 times the influence of one unit of N deposition. These stoichiometric considerations, combined with the evidence presented here, suggest that increases in P deposition may be a major driver of alpine Lake trophic status, particularly in the Southern Hemisphere. These results underscore the need for the broader scientific community to consider the impact of atmospheric phosphorus deposition on the water quality of naturally oligotrophic lakes. ©2015. 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/77935
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geological Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Department of Ecosystem and Conservation Science, University of Montana, Missoula, MT, United States
Recommended Citation:
Brahney J,, Mahowald N,, Ward D,et al. Is atmospheric phosphorus pollution altering global alpine Lake stoichiometry?[J]. Global Biogeochemical Cycles,2015-01-01,29(9)