DOI: 10.1002/2017GB005788
Scopus记录号: 2-s2.0-85045326375
论文题名: Reversal of Increasing Tropical Ocean Hypoxia Trends With Sustained Climate Warming
作者: Fu W ; , Primeau F ; , Keith Moore J ; , Lindsay K ; , Randerson J ; T
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2018
语种: 英语
英文关键词: Climate warming
; Hypoxia
; Intermediate water
; Nutrient trapping
; Southern Ocean
; Ventilation
英文摘要: Dissolved oxygen (O2) is essential for the survival of marine animals. Climate change impacts on future oxygen distributions could modify species biogeography, trophic interactions, biodiversity, and biogeochemistry. The Coupled Model Intercomparison Project Phase 5 models predict a decreasing trend in marine O2 over the 21st century. Here we show that this increasing hypoxia trend reverses in the tropics after 2100 in the Community Earth System Model forced by atmospheric CO2 from the Representative Concentration Pathway 8.5 and Extended Concentration Pathway 8.5. In tropical intermediate waters between 200 and 1,000 m, the model predicts a steady decline of O2 and an expansion of oxygen minimum zones (OMZs) during the 21st century. By 2150, however, the trend reverses with oxygen concentration increasing and OMZ volume shrinking through 2300. A novel five-box model approach in conjunction with output from the full Earth system model is used to separate the contributions of biological and physical processes to the trends in tropical oxygen. The tropical O2 recovery is caused mainly by reductions in tropical biological export, coupled with a modest increase in ventilation after 2200. The time-evolving oxygen distribution impacts marine nitrogen cycling, with potentially important climate feedbacks. ©2018. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77677
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth System Science University of California Irvine, CA USA; Climate and Global Dynamics Division National Center for Atmosphere Research Boulder, CO USA
Recommended Citation:
Fu W,, Primeau F,, Keith Moore J,et al. Reversal of Increasing Tropical Ocean Hypoxia Trends With Sustained Climate Warming[J]. Global Biogeochemical Cycles,2018-01-01