DOI: 10.1029/2017JG004216
Scopus记录号: 2-s2.0-85047639083
论文题名: Tale of Two Storms: Impact of Extreme Rain Events on the Biogeochemistry of Lake Superior
作者: Cooney E.M. ; McKinney P. ; Sterner R. ; Small G.E. ; Minor E.C.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 5 起始页码: 1719
结束页码: 1731
语种: 英语
英文关键词: carbon cycling
; flood events
; Kd(490)
; Lake Superior
; nutrients
; storm plumes
Scopus关键词: biogeochemistry
; carbon cycle
; chlorophyll a
; climate change
; dissolved organic matter
; extreme event
; flood
; nutrient
; plume
; rainfall
; sediment transport
; spatiotemporal analysis
; storm
; water quality
; Great Lakes [North America]
; Great Lakes [North America]
; Lake Superior
英文摘要: Climate change is expected to profoundly affect the Great Lakes region of North America. An increase in intensity and frequency of rain events is anticipated to deliver more runoff and to increase riverine inputs to Lake Superior's ecosystem. The effects of these changes on key biogeochemical parameters were analyzed by coupling satellite data, water column sensor profiles, and discrete surface-water sampling after two “500-year” flood events in the Lake Superior basin. This study provides both a spatial and a temporal sense of how plumes interacted within the ecosystem. We also determined the significant differences in water quality parameters for plume versus nonplume waters. These two plumes were important for delivery of nutrients, with variable transport of sediments and colored dissolved organic matter (CDOM). Data from the 2012 storm event showed a significant input of total nitrogen, total phosphorus, and CDOM to the system. In the 2016 storm event, carbon cycling parameters (acidity, total inorganic carbon, and dissolved organic carbon) and ammonia levels were elevated within the plume. In neither storm event was there a significant difference in chlorophyll a between plume and nonplume waters during our sampling cruises. These two plume events were similar in amount of precipitation, but their effect on the biogeochemistry of Lake Superior varied due to differences in the watersheds where the rain fell. The studied plume events were dynamic, changing with currents, winds, and the settling of suspended sediments. ©2018. 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/113955
Appears in Collections: 气候减缓与适应
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作者单位: Water Resources Science Program, University of Minnesota, Duluth, MN, United States; Large Lakes Observatory, University of Minnesota Duluth, Duluth, MN, United States; US EPA Mid-Continent Ecology, Duluth, MN, United States; Department of Biology, University of Minnesota, Duluth, MN, United States; Biology Department, University of St. Thomas, St. Paul, MN, United States; Department of Chemistry and Biochemistry, University of Minnesota, Duluth, MN, United States
Recommended Citation:
Cooney E.M.,McKinney P.,Sterner R.,et al. Tale of Two Storms: Impact of Extreme Rain Events on the Biogeochemistry of Lake Superior[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(5)