DOI: 10.1002/2015GL067334
论文题名: What drives interannual variability of hypoxia in Chesapeake Bay: Climate forcing versus nutrient loading?
作者: Li M. ; Lee Y.J. ; Testa J.M. ; Li Y. ; Ni W. ; Kemp W.M. ; Di Toro D.M.
刊名: Geophysical Research Letters
ISSN: 0094-9305
EISSN: 1944-9036
出版年: 2016
卷: 43, 期: 5 起始页码: 2127
结束页码: 2134
语种: 英语
英文关键词: climate
; hypoxia
; interannual variability
; nutrient loading
Scopus关键词: Budget control
; Digital storage
; Nutrients
; Oxygen
; Oxygen supply
; Biogeochemical process
; Climate
; Hypoxia
; Interannual fluctuations
; Interannual variability
; Nutrient loading
; Primary production
; Relative contribution
; Loading
英文摘要: Oxygen depletion in estuaries is a worldwide problem with detrimental effects on many organisms. Although nutrient loading has been stabilized for a number of these systems, seasonal hypoxia persists and displays large year-to-year variations, with larger hypoxic volumes in wetter years and smaller hypoxic volumes in drier years. Data analysis points to climate as a driver of interannual hypoxia variability, but nutrient inputs covary with freshwater flow. Here we report an oxygen budget analysis of Chesapeake Bay to quantify relative contributions of physical and biogeochemical processes. Vertical diffusive flux declines with river discharge, whereas longitudinal advective flux increases with river discharge, such that their total supply of oxygen to bottom water is relatively unchanged. However, water column respiration exhibits large interannual fluctuations and is correlated with primary production and hypoxic volume. Hence, the model results suggest that nutrient loading is the main mechanism driving interannual hypoxia variability in Chesapeake Bay. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960332377&doi=10.1002%2f2015GL067334&partnerID=40&md5=8edc28d70672e818cf0f34723a479b9d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10268
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: Horn Point Lab, University of Maryland Center for Environmental Science, Cambridge, Maryland, United States
Recommended Citation:
Li M.,Lee Y.J.,Testa J.M.,et al. What drives interannual variability of hypoxia in Chesapeake Bay: Climate forcing versus nutrient loading?[J]. Geophysical Research Letters,2016-01-01,43(5).