DOI: 10.1002/2016GL069254
论文题名: Climate variability and extremes, interacting with nitrogen storage, amplify eutrophication risk
作者: Lee M. ; Shevliakova E. ; Malyshev S. ; Milly P.C.D. ; Jaffé P.R.
刊名: Geophysical Research Letters
ISSN: 0094-8844
EISSN: 1944-8575
出版年: 2016
卷: 43, 期: 14 起始页码: 7520
结束页码: 7528
语种: 英语
英文关键词: Chesapeake Bay
; climate variability
; dry spells
; nitrogen storage
; nitrogen-load anomalies
; watershed modeling
Scopus关键词: Climatology
; Drought
; Eutrophication
; Nitrogen
; River pollution
; Chesapeake Bay
; Climate variability
; Dry spells
; Nitrogen loads
; Nitrogen storages
; Watershed modeling
; Climate models
英文摘要: Despite 30 years of basin-wide nutrient-reduction efforts, severe hypoxia continues to be observed in the Chesapeake Bay. Here we demonstrate the critical influence of climate variability, interacting with accumulated nitrogen (N) over multidecades, on Susquehanna River dissolved nitrogen (DN) loads, known precursors of the hypoxia in the Bay. We used the process model LM3-TAN (Terrestrial and Aquatic Nitrogen), which is capable of capturing both seasonal and decadal-to-century changes in vegetation-soil-river N storage, and produced nine scenarios of DN-load distributions under different short-term scenarios of climate variability and extremes. We illustrate that after 1 to 3 yearlong dry spells, the likelihood of exceeding a threshold DN load (56 kt yr−1) increases by 40 to 65% due to flushing of N accumulated throughout the dry spells and altered microbial processes. Our analyses suggest that possible future increases in climate variability/extremes—specifically, high precipitation occurring after multiyear dry spells—could likely lead to high DN-load anomalies and hypoxia. ©2016. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978427567&doi=10.1002%2f2016GL069254&partnerID=40&md5=2a1087064528b5fe689f6f66eb5deedf
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9807
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States
Recommended Citation:
Lee M.,Shevliakova E.,Malyshev S.,et al. Climate variability and extremes, interacting with nitrogen storage, amplify eutrophication risk[J]. Geophysical Research Letters,2016-01-01,43(14).